Bicyclic pyrrole derivative, pharmaceutical composition in which the derivative is comprised, the composition for use in therapy and use of the derivative when preparing a medicament

Technical field

The invention relates to a bicyclic pyrrole derivative, a pharmaceutical composition comprising the bicyclic pyrrole derivative as an active ingredient, the pharmaceutical composition for use in the treatment and use of said bicyclic pyrrole derivative in the manufacture of a medicament.

BACKGROUND OF THE INVENTION

Protein kinases are involved in signaling that directs cell activation, growth and differentiation in response to extracellular mediators and environmental changes. In general, these kinases are divided into several groups; which preferably phosphorylate serion and / or threonine residues and some preferably phosphorylate tyrosine residues [SK Hanks and T. Hunter, FASEB. J. 1995, 9, 576-596]. Serine / threonine kinases include, for example, protein kinase C isoforms. [AC Newton, J. Biol. Chem. 1995, 270, page 28495-28498] and a group of cyclin dependent kinases such as cdc2 [J. Pins, Trends in Biochemical Sciences 1995, 18, page 195-197], Tyrosine kinases include membrane growth factor receptors such as epidermal growth factor receptor [S, Iwashita and M. Kobayashi, Celular Signaling 1992,4, pages 123-132 ], and cytosolic non-receptor kinases such as p56tck, p59fYn, ZAP-70 and csk kinases [C, Khan et al., Ann. Roar. Immunoi 1994, 12, pp. 555-592].

Too high protein kinase activity occurs in a number of diseases that result from abnormal cell function which, directly or indirectly, for example, by failure of the proper kinase control mechanism, may be associated with, for example, mutation, overexpression, or inappropriate enzyme activation; or caused by low production of cytokines or growth factors that are also involved in signal transduction after or against kinase. In all these cases, selective inhibition of kinase action may have a beneficial effect.

Syk is a 72-kDa cytoplasmic protein tyrosine kinase that is expressed by various hematopoietic cells and is a key element of some cascades that link antigen receptors and cellular responses. Therefore, Syk plays a central role in signaling the high affinity of the IgE receptor, FcεR1, in breast cells, and in signaling the receptor antigen in T and B lymphocytes. Signaling pathways have common features in breast and t cell cells. Receptor ligand binding sites lack intrinsic tyrosine kinase activity, but interact with transfer subunits that contain immunoreceptor tyrosine activation motifs (ITAMs) [M. Reth, Nature, 1989, 338, pages 383-384]. These motifs are present in the β and γ subunits of the FcεR1, the β-subunit of the T cell receptor (TCR), and the IgGa and IgG β subunits of the B cell receptors (BCR). [NS van Oers and A. Weiss, Seminar in Immunology, 1995, 7, pp. 227-236]. After antigen binding and multimerization, the ITAm residues are phosphorylated by Src family protein tyrosine kinase. Syk belongs to a unique family of tyrosine kinases having two pairs of Src homologous 2 (SH2) domains and a C-terminal catalytic domain. These SH2 domains bind with high affinity to ITAMs, and this SH2-linked association of Syk with an activated receptor stimulates Syk kinase activity and localizes Syk in the plasma membrane.

In the Syk deficient mice, degranulation of mammary gland cells is inhibited, suggesting that this is an important target for the development of agents that stabilize breast tissue cells [PS Costelo, Oncogene, 1996, 13, pages 2595-2605]. Similar studies have shown a critical role for Syk in BCR and TCR signaling [AM Cheng, Nature, 1995, 378, pages 303-306, (1995) and DH Chu et al., Immunological Reviews, 1998, 165, pages 167-180]. Syk is also involved in eosinophil survival in response to IL-5 and GM-CSF [S. Yosefi et al., J. Exp. Med., 1996, 183, pages 1407-1414. Despite the key role

In the mammary gland cells and in BCR and T cells, there is little known about the mechanism by which Syk transmits effectors. Two adapter proteins, BLNKs (SLP-65) and SLP-76, have been postulated as Syk substrates in B cells and mammary gland cells, which have been postulated as the interface between Syk and effectors [M. Ishiai et al. Immunity, 1999, 10, pages 117-125 and LR

Hedricks-Taylor et al., J. Biol. Chem., 1997, 272, pages 1363-1367]. Furthermore, Syk appears to play an important role in the CD40 signaling pathway, which plays an important role in B cell proliferation [M. Faris et al., J. Exp. Med., 1994, 179, pp. 1923-1931].

Syk is also involved in the activation of platelets stimulated with low affinity IgG receptor (Fc gam gamma-RIIA) or stimulated with collagen [F. Yanaga et al., Biochem. J. 1995, 311 (PT.2) pages 471-478].

Focal adhesion kinase (FAK) is a non-receptor tyrosine kinase that participates in integrin-mediated signal transduction pathways. FAK is colonized with integrins at focal contact sites, and activation of FAk and its phosphorous tyrosine has been shown to depend on the binding of integrins to their extracellular ligands in a number of cell types. The results of some studies support the hypothesis that FAK inhibitors might be useful in the treatment of cancer. For example, FAK-deficient cells poorly migrate due to chemotactic signals and high expression of FAK C-terminal domains blocks scattering and chemotactic migration (Sieg et al., J. Cell Science

1999, 112, 2677-2691; Richardson A. and Parsons T., Cell, 1997, 97, 221-231); and, in addition, tumor cells treated with FAK anti-oligonucleotides lose their attachment and undergo apoptosis (Xu et al., Cell Growth Differ. 1996, 4, 413-418). FAK overexpression has been reported in prostate, breast, thyroid, colon and lung cancer . The level of FAK expression is directly related to tumors that show the most aggressive phenotype.

Angiogenesis or formation of new vessels by development from pre-existing vasgiogenesis or formation of new vessels by development from pre-existing vasculature is of key importance for embryonic development and organogenesis. Abnormally developed neovascularization occurs in rheumatoid arthritis, diabetic retinopathy and during tumor development (Folkman, Nat. Med. 1995, 1, 27-31). Angiogenesis is a com30 plex multistep process that involves endothelial cell activation, migration, proliferation, and survival. Numerous angiogenesis studies in the past twenty years have defined a number of therapeutic targets involving kinases, redefining a number of therapeutic targets including kinases, proteases, and integrins, leading to a number of new anti-angiogenic agents including KDR inhibitors, some of which are already clinically tested (Jekunen and et al., Cancer Treatment

Roar. 1997, 23,263-286). Angiogenesis inhibitors can be used in the first line as a support and also preventively in the onset or recurrence of malignancies.

Some proteins have been found in yeast and drosophils that are involved in chromosome segregation and spindle formation. Disruption of these proteins leads to poor chromosome segregation and mono40 polar or disrupted spindles. These kinases include Ipl1 and the authors of the S. cerevisiae kinases and drosophils, which are required for centrosome separation and chromosome segregation. Several laboratories have recently cloned and characterized one human homologue of yeast Ipll. This kinase referred to as Aurora2, STK15 or BTAK belongs to the serine / threonine kinase family. Bischoff et al. have shown that Aurora2 is an oncogene and is widespread in human round orectal cancer cells (EMBO J., 1998, 17, 3052-3065) and has also been shown in epithelial tumors, such as breast cancer.

SUMMARY OF THE INVENTION

We have now discovered a new class of bicyclic pyrrole derivatives having significant pharmaceutical properties, in particular the ability to inhibit protein kinases, more particularly the ability to selectively inhibit Syk kinase.

-2GB 30I75I Bo

Accordingly, the present invention provides a pharmaceutical composition comprising an effective amount of a selective kinase inhibitor which is a bicyclic pyrrole derivative of the formula I:

<img file="CZ301751B6_D0001.tif" />

O) in which

R¹ represents an indolyl group optionally substituted by one or more of acyl, alkylenedioxy, alkenyl, alkenyloxy, alkynyl, aryl, cyano, halogen, hydroxy10, heteroaryl, heterocycloalkyl, nitro, R⁴, - £ (= Ο) -ΝΥΎ²-C (= O) -OR⁵, -ΝΥΎ², -N (R⁶) -C (= O) -R⁷, -N (R⁶) C (= O) -NY³Y⁴, -N (R⁶) -C (= O) -OR⁷, -N (R⁶) -SO2R⁷, -N (R⁶) -SO2NY³Y⁴, -SO3-NY¹ Y² and -Z²R⁴;

R⁴ represents an alkyl, cycloalkyl or cycloalkylalkyl group, each of which is optionally substituted with a substituent selected from the group consisting of aryl, cycloalkyl, cyano, halogen, heteroaryl, heterocycloalkyl, -CHO or 5-, 6- or 7 thereof -membered cyclic acetyl derivative,

-C (= O) -NY'Y², -C (= O) -OR⁵, -NY'y \ -N (R⁶) -C (= O) -R⁷, --NR @ 4 --OHQyV, --N (R @ 2)⁶) SOr-R⁷, -N (R⁶) -SOr-NY'Y⁴, -OR⁷ and one or more groups selected from hydroxy and carboxy;

R⁵ represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an arylalkyl group, a heteroaryl group or a heteroarylalkyl group;

R⁶ represents a hydrogen atom or a C 1-6 alkyl group;

R⁷ represents alkyl, aryl, arylalkyl, cycloacyl, cycloalkylalkyl, heteroaryl, heteroarylalkyl, heterocycloalkyl or heterocycloalkylalkyl;

R⁸ represents a hydrogen atom or a C 1-6 alkyl group;

X¹ represents CH, C-halogen, C-CN, CR⁷C-NY³Y⁴, C - OH, CZ²R⁷CC (= O) -OR⁵C (H = O) -NY³Y⁴, CN (R⁸) -C (= O) -R⁷C-SO2NY³Y⁴, CN (R⁸) -SO2R⁷, C-alkenyl, C-alkynyl or C-NO₂;

Y¹ and Y² independently represent a hydrogen atom, an alkenyl group, an aryl group, a cycloalkyl group, a heteroaryl group or an alkyl group optionally substituted by one or more of aryl, halogen, heteroaryl, hydroxy -C (= O) -NY³Y⁴, -C (= O) -Or \ -NNY³Y⁴, -N (R^OX (= O) -R⁷, -N (R⁶&gt; € (= O) -NY³Y⁴, -N (R⁶) -SO 2 -R⁷, -N (R⁶&gt; -SO₂-NY³Y⁴ and -OR⁷; or -NY^lY² it may form a cyclic amine;

Y³ and Y⁴ independently represent hydrogen, alkenyl, alkyl, aryl, arylalkyl, cycloalkyl, heteroaryl or heteroarylalkyl; or -NY³Y⁴ it may form a cyclic amine;

-3GB 301751 B6

OF² represents O or S (O) n;

n is zero or an integer of I or 2;

wherein (a) "acyl" means H-CO- or alkyl-CO-;

(b) "alkyl" means, unless otherwise indicated, an aliphatic hydrocarbon group which may have a straight or branched chain containing from 1 to 15 carbon atoms in the chain and optionally substituted with one or more halogen atoms;

(c) "alkylenedioxy" means an -O-alkylene-O- group in which the alkylene moiety is an aliphatic divalent group derived from a straight or branched alkyl group;

(d) "alkenyl" means an -O-alkenylene-O- group in which the alkylene radical is an aliphatic divalent group derived from a straight or branched alkyl group;

(d) "alkenyl" means an aliphatic hydrocarbon group which contains a carbon-carbon double bond and which may have a straight or branched chain containing from 2 to 15 carbon atoms in the chain;

(e) "alkynyl" means an aliphatic hydrocarbon group which contains a carbon-carbon triple bond and which may have a straight or branched chain containing from 2 to 15 carbon atoms in the chain;

(f) "aryl" as a group or part of a group means: (i) a monocyclic or multicyclic aromatic carbocyclic radical having 6 to 14 carbon atoms; or (ii) a partially unsaturated multicyclic aromatic carbocyclic radical in which an aryl group and a cycloalkyl group or a cycloalkenyl group are condensed together to form a cyclic structure, unless otherwise defined, wherein the aryl groups are optionally substituted with one or more substituents of an aryl group which may be identical or different and which are selected from the group consisting of acyl, acylamino, alkoxy, alkoxycarbonyl, alkylenedioxy, alkylsulfinyl, alkylsulfonyl, alkylthio, aroyl, aroylamino, aryl, arylalkyloxy, arylalkyloxycarbonyl, arylalkylthio, aryloxy, aryloxy and aryloxycarbonyl, aryloxycarbonyl, aryloxy and aryloxycarbonyl; arylthio, carboxy, or bioisoster cyano, halogen, heteroaryl, heteroaryl, heteroarylalkyloxy, heteroaroylamino, heteroaryloxy, hydroxy, nitro, trifluoromethyl, -NY³Y⁴, -CONY³Y⁴, -SO2NY³Y⁴, -NY³-C (= O) alkyl, -NY³SO 2 alkyl or alkyl optionally substituted with aryl, heteroaryl, hydroxy, and -NY³Y, (g) "cyclic amine" means a 3- to 8-membered monocyclic cycloalkyl ring system in which one of the ring carbon atoms is replaced by nitrogen and which (i) may also contain another heteroatom-containing group selected from O, S, SO₂ aNY⁷where Y⁷ represents hydrogen, alkyl, aryl, arylalkyl, -C (= O) -R⁷-C (= O) -OR⁷ or - $ O₂R⁷; and (ii) and which may be fused to another aryl, heteroaryl, heterocycloalkyl or cycloalkyl ring to form a bicyclic or tricyclic ring system;

(H) "cycloalkenyl" means a non-aromatic monocyclic or multicyclic ring system containing at least one carbon-carbon double bond and having from 3 to 10 carbon atoms;

(i) "cycloalkyl" means a saturated monocyclic or bicyclic ring system having 3 to 10 carbon atoms and optionally substituted with oxo;

(j) "heteroaryl" as a group or part of a group means: (i) an aromatic monocyclic or multicyclic organic radical containing 5 to 10 ring members wherein there are also one, two, three or four ring members selected from N and O and which is optionally substituted as described in (f) above unless otherwise indicated; (ii) a partially saturated multicyclic heterocarbocyclic moiety wherein the heteroaryl group and the cycloalkyl or cycloalkenyl group are fused together to form a cyclic structure optionally substituted with one or more aryl group substituents as defined in (f) above unless otherwise indicated;

(k) "heterocycloalkyl" means (i) a cycloalkyl group containing 3 to 7 ring members containing one or two heteroatoms or one or two heteroatom-containing groups, the heteroatom selected from O, S and NY⁷and which may be optionally substituted by an oxo group; (ii) a partially saturated multicyclic heterocarbocyclic moiety wherein the aryl or heteroaryl ring, each optionally substituted with one or more aryl group substituents, and the heterocycloalkyl group are fused together to form a cyclic structure; and its corresponding N-oxides and its ester prodrugs and its acidic bioisosteres; together with one or more pharmaceutically acceptable carriers or excipients;

wherein "acid bioisoster" means a compound in which the group -COOH is replaced by a group selected from the group consisting of -C (= O) -NHOH, -C (= Oy-CH₂OH, -C (= O) -CH₂SH, -C (-O) NH-CN, sulfo, phosphono, alkylsulfonylcarbamoyl heteroarylsulfonylcarbamoyl, N-methoxycarbamoyl, 3-hydroxy-3-cyclobuten-1,2-di30one, 3,5-dioxo-1,2 A 4-oxadiazolidinyl group, a 3-hydroxyisoxazolyl group, and a 3-hydroxy-1-methylpyrazolyl group.

The invention also relates to a bicyclic derivative of the formula I as defined above.

A preferred derivative of the invention is a bicyclic pyrrole derivative of the formula I wherein X¹ is CH.

A preferred derivative of the invention is a bicyclic pyrrole derivative of the formula I wherein X¹ means C (C_AND-C₄) "Alkoxy.

A preferred derivative of the invention is a bicyclic pyrrole derivative of the Formula I wherein X * is C-aryl.

A preferred derivative of the invention is a bicyclic pyrrole derivative of the formula I wherein X¹ represents an OCI group.

A preferred derivative of the invention is a bicyclic pyrrole derivative of the formula I wherein X¹ means C-CN.

-5GB 301751 B6

A preferred derivative according to the invention is a bicyclic pyrrole derivative of the general formula I in which the formula la has:

<img file="CZ301751B6_D0002.tif" />

Cla), in which R⁴, R⁷ and X¹ have the meanings defined in claim 1; R⁹ R is hydrogen;⁴5 alkenyl or heterocycloalkyl; R¹⁰ means alkenyloxy, carboxy or acidic bioisoster, cyano, halogen, hydroxy, heteroaryl, R⁴, -C (= O) -NY'Y², -OR⁴, -N (R^Ď) -C (= O) -R⁷, -N (R⁶) -SO4R⁷ or -NY^lY²; and p is zero or an integer of 1 or 2; and ester prodrugs thereof, and pharmaceutically acceptable salts and solvates thereof, for example hydrates, a bicyclic pyrrole derivative of formula Ia, and ester prodrugs thereof.

A preferred derivative of the invention is a bicyclic pyrrole derivative of formula (Ia) wherein X¹ represents CH, C- (C 1 -C 4) -alkoxy, C-aryl, C-halogen or C-CN.

A preferred derivative of the invention is a bicyclic pyrrole derivative of formula (Ia) wherein R is⁹ means;

(i) a hydrogen atom;

(ii) a C 1-6 -alkyl group;

(iii) a C 1-6 -alkyl substituted by a hydroxy group;

(iv) a C 1-6 -alkyl group substituted with -N (R 3);^OIC (= O) -R⁷;

(v) a C 1-6 -alkyl group substituted with a C 1 -C 4 -N 1 R 4 group²; or (vi) a cycloalkyl alkyl group substituted with a hydroxy group.

A preferred derivative of the invention is a bicyclic pyrrole derivative of formula (Ia) wherein R is¹⁰ means:

(i) hydroxy;

(ii) -OR⁴where R⁴ represents an alkyl group;

(iii) -OR⁴where R⁴ represents an alkyl group or a cycloalkyl group, each of which is substituted with one or more hydroxy groups;

(iv) -OR⁴where R⁴ represents an alkyl group substituted with an alkoxy group;

-6GB 30-175I Bo (v) -OR⁴where R⁴ represents an alkyl group or a cycloalkyl group, each of which is substituted with one or more carboxy groups;

(vi) -OR⁴where R⁴ represents a cycloalkyl group substituted with a -C -COj-NY ^ group²;

(vii) -N (R V C = O) -R⁷;

(νίϋ) -ΟΟΝΥ'Υ²;

io (ix) carboxy;

(x) an alkyl group substituted with a carboxy group;

(xi) a heteroaryl group; or (xii) a tetrazolyl group or an N-methyltetrazolyl group.

A preferred derivative of the invention is a bicyclic pyrrole derivative of formula (Ia) wherein R 1 is R 2¹⁰ is attached at position 5 of the indolyl ring.

A preferred derivative of the invention is a bicyclic pyrrole derivative of the formula I selected from the group consisting of:

1- [1-methyl-3- (1H-pyrrolo [2,3-6] pyridin-2-yl) -1H-indol-5-yloxy] cyclobutane-25 carboxylic acid amide;

2- (5-methoxy-1-methyl-1 H -indol-3-yl) -1 H -pyrrolo [2,3- b] pyridine-4-carbonitrile; and ester prodrugs thereof, and pharmaceutically acceptable salts and solvates of such compounds, and ester prodrugs thereof.

The present invention also provides a bicyclic pyrrole derivative as defined above, or a corresponding ester prodrug, or a pharmaceutically acceptable salt or solvate thereof, or an ester prodrug thereof for use in therapy.

The present invention also provides a bicyclic pyrrole derivative as defined above, or a corresponding ester prodrug, or a pharmaceutically acceptable salt or solvate thereof, or an ester prodrug thereof, for use in treating a patient suffering from or at risk of a disease that may be ameliorated by administration of a catalytic Syk kinase inhibitor.

The present invention also provides a composition as defined above for use in treating a patient suffering from or at risk of a disease that may be ameliorated by administration of an inhibitor of the catalytic activity of Syk kinase.

The present invention also provides a composition as defined above for use in the treatment of inflammatory diseases.

The present invention also provides a composition as defined above for use in the treatment of asthma.

The present invention also provides a composition as defined above for use in the treatment of psoriasis.

The present invention also provides a composition as defined above for use in the treatment of joint inflammation.

The present invention also provides a composition as defined above for use in the treatment of inflammatory bowel disease.

-7EN 301751 B6

The present invention also provides a composition as defined above for use in the treatment of cancer.

The invention also provides the use of a bicyclic pyrrole derivative or a corresponding ester prodrug as defined above in the manufacture of a medicament for the treatment of a patient suffering from or at risk of a disease that can be improved by administering an inhibitor of catalytic Syk kinase activity.

The invention also provides the use of a bicyclic pyrrole derivative or the corresponding ester prodrug or a pharmaceutically acceptable salt or solvate thereof or an ester prodrug thereof in the manufacture of a medicament for the treatment of asthma.

The invention also provides the use of a bicyclic pyrrole derivative or a corresponding ester prodrug or a pharmaceutically acceptable salt or solvate thereof or an ester prodrug thereof in the manufacture of a medicament for the treatment of psoriasis.

The invention also provides the use of a bicyclic pyrrole derivative or a corresponding ester prodrug or a pharmaceutically acceptable salt or solvate thereof or an ester prodrug thereof in the manufacture of a medicament for the treatment of joint inflammation.

The invention also provides the use of a bicyclic pyrrole derivative or the corresponding ester prodrug or a pharmaceutically acceptable salt or solvate thereof or an ester prodrug thereof in the manufacture of a medicament for the treatment of inflammatory bowel disease.

The invention also provides the use of a bicyclic pyrrole derivative or the corresponding ester prodrug or a pharmaceutically acceptable salt or solvate thereof or an ester prodrug thereof in the manufacture of a medicament for the treatment of cancer.

Unless otherwise stated, the terms in the description have the following meanings:

"Patient" refers to both human and other mammals.

"Acidic bioisoster" is a group that exhibits chemical and physical similarity that leads to very similar biological properties to a carboxyl group (see Lipinski, Annual Reports in Mecicinal Chemistry, 1986, 21, p. 283; "Bioisosterims ind Drug Design" ;

Hwahak Sekye, 1993, 33, pages 576-579; "Application of Biisosterism to New Drug Design"; Zhao, Huaxue Tongbao, 1995, pages 34-38; "Bioisosteric Replacement and Development of Lead Compounds in Drug Design"; Graham, Theochem, 1995, 343, pages 105-109; Theoretic Studies Applied To Drug Design; ab anitio Electronic Distributions in Biososteres'). Examples of suitable acid bioisosteres are -C (= O) -NHOH, -QOj-CFfOH,

-C (= O) CH 2 OH, -C (= O) -NH-CN, sulfo, phosphono, alkylsulfonylcarbamoyl, tetrazolyl, arylsulfonylcarbamoyl, heteroarylsulfonylcarbamoyl, N-methoxycarbamoyl, 3-hydroxy-3-cyclobutene 2-dione, 3,5-dioxo-1,2,4-oxadiazolidinyl or heterocyclic phenols such as 3-hydroxyisoxazolyl and 3-hydroxy-1-methylpyrazolyl.

An "acyl group" is an H-CO- or alkyl-CO- group, the alkyl group of which is defined below.

"Acylamino" is an acyl-NH- group whose acyl group is as defined above.

"Alkenyl" is an aliphatic hydrocarbon group containing a carbon-carbon double bond and which may be straight or branched with 2 to 15 carbon atoms in the chain. Preferred alkenyl groups have 2 to 12 carbon atoms in the chain; more preferably 2 to 6 carbon atoms in the chain (for example 2 to 4 carbon atoms). "Branched" means that one or more lower alkyl groups, such as a methyl group, are attached to a linear chain, here to a linear alkenyl group,

Ethyl or propyl, "Lower alkenyl" is 2 to 4 carbon atoms in the chain, which may be straight or branched. Examples of alkenyl groups are ethenyl, propenyl, n -butenyl, n -butenyl, 3-methylbut-2enyl, n-pentenyl, heptenyl, octenyl, and decenyl.

An "alkenyloxy group" is an alkenyl-O- group whose alkenyl group is as defined above. An exemplary alkenyloxy group is allyloxy.

io "Alkoxy" is an alkyl-Ο- group whose alkyl group is described below. An exemplary alkoxy group is difluoromethoxy, methoxy, trifluoromethoxy, ethoxy, n-propoxy, n-propoxy, n-butoxy, and heptoxy.

"Alkoxycarbonyl" is an alkyl 1-O-CO- group whose alkyl group is described below.

An exemplary alkoxycarbonyl group is methoxy and ethoxycarbonyl.

An "alkyl group" is, unless otherwise indicated, an aliphatic hydrocarbon group which may be straight or branched and may have from 1 to 15 carbon atoms in the chain and optionally substituted with one or more halogen atoms. Preferred alkyl groups have 1 to 6 carbon atoms. A "lower alkyl group" as a group or part of a lower alkoxy group, a lower alkylthio group, a lower alkylsulfinyl group or a lower alkylsulfonyl group is, unless otherwise indicated, an aliphatic hydrocarbon group which may have a straight or branched chain of 1 to 4 carbon atoms. An exemplary alkyl group is methyl, ethyl, n-propyl, n-propyl, n -butyl, s-butyl, n -butyl, n -pentyl, 3-pentyl, heptyl, octyl a group, a nonyl group, a decyl group and a dodecyl group. An exemplary alkyl group substituted with one or more halogen atoms is a trifluromethyl group.

An "alkylene group" is an aliphatic divalent group derived from a straight or branched alkyl group 30 whose alkyl group is as described above. Exemplary alkylene groups are methylene, ethylene, and trimethylene.

"Alkylenedioxy" is -O-alkylene-Ο-, wherein the alkylene group is as defined above. Examples of alkylenedioxy groups are methylenedioxy and ethylenedioxy "Alkylsulfinyl" is an alkyl-SO- group whose alkyl group is as described above. Preferred alkyl sulfinyl groups are those wherein the alkyl group contains 1 to 4 carbon atoms.

An "alkylsulfonyl group" is an alkyl-SO 2 - group whose alkyl group is as described above.

Preferred alkylsulfonyl groups are those in which the alkyl group contains 1 to 4 carbon atoms.

"Alkylsulfonylcarbamoyl" is alkyl-SO₂-NH-C (= O) - whose alkyl group is as described above. Preferred alkylsulfonylcarbamoyl groups are those in which the alkyl group contains 1 to 4 carbon atoms.

"Alkyithio" is an alkyl-S- group whose alkyl group is described. Above. An exemplary alkylthio group is methylthio, ethylthio, isopropylthio and heptylthio.

An "alkynyl group" is an aliphatic hydrocarbon group containing a carbon-carbon triple bond and which may be straight or branched and may contain from 2 to 15 carbon atoms in the chain. Preferred alkynyl groups have 2 to 12 carbon atoms in the chain, more preferably 2 to 6 carbon atoms (for example 2 to 4 carbon atoms). Exemplary alkynyl groups are ethynyl group, propynyl group, n-butynyl group, t -butynyl group, 3-methylbut-2-ynyl group and n-pentynyl group.

"Aroyl" is an aryl-CO- group whose aryl group is described below. An exemplary aroyl group is benzoyl and 1- and 2-naphthoyl.

"Aroy lamino" is an aroyl-ΝΗ- group whose aroyl group is as described above.

An "aryl group" as a group or part of a group is:

(i) an optionally substituted monocyclic or multicyclic aromatic carbocyclic group containing 6 to 14 carbon atoms, such as phenyl or naphthyl; or (ii) an optionally substituted partially saturated multicyclic aromatic carbocyclic group whose aryl and cycloalkyl or cycloalkenyl groups are joined to form a cyclic structure such as a tetrahydronaphthyl, indenyl or indanyl ring.

Unless otherwise indicated, the aryl group may be substituted with one or more aryl group substituents, which may be the same or different, where the "aryl group substituent" may be, for example, acyl, acylamino, alkoxy, alkoxycarbonyl, alkylenedioxy, alkylsulfinyl, alkylsulfonyl , alkylthio, aroyl, aroylamino, aryl, arylalkyloxy, arylalkyloxycarbonyl, arylalkylthio, aryloxy, aryloxycarbonyl, arylsulfinyl, arylsulfonyl, arylthio, carboxy (or an acidic new bioisoster), cyano, halogen, heteroaryl, heteroaryl, heteroarylalkyloxy, heteroaryloxy, heteroaryloxy, heteroaryloxy,³Y⁴, -CONY group³Y⁴, -SO2NY group³Y⁴, -NY³-C (= O) alkyl, -NY SO 2 alkyl or alkyl optionally substituted with aryl, heteroaryl, hydroxyl or -NY³Y⁴.

"Arylalkyl" is an aryl-alkyl- group whose aryl and alkyl groups are as defined above. Preferred arylalkyl groups contain alkyl groups having 1 to 4 carbon atoms. Exemplary arylalkyl groups are benzyl, 2-phenethyl and naphthalenomethyl, "arylalkyloxy" is an aryl alkyl 1-Ό- group whose arylalkyl group is as described above. An exemplary aryl alkyloxy group is a benzyloxy group and a 1- or 2-naphthalenmethoxy group.

"Arylalkyloxycarbonyl" is an arylalkyl 1-OCO- group whose arylalkyl group is as defined above. An exemplary arylalkyloxycarbonyl group is a benzyloxycarbonyl group.

"Arylalkylthio" is an arylalkyl 1-S- group whose arylalkyl group is as defined above. An exemplary arylalkylthio group is benzylthio.

"Aryloxy" is an ayl-Ο- group whose aryl group is as defined above. Exemplary aryloxy groups are phenoxy and naphthoxy, each of which may be optionally substituted.

An "aryloxycarbonyl" group is an aryl-OC (= O) - group whose aryl group is as described above. An exemplary aryloxycarbonyl group is a phenoxycarbonyl group and a naphthoxycarbonyl group.

- 10GB 301/51 A 'Arylsulfinyl group' is an aryl-SO- group whose aryl group is as described above.

"Arylsulfonyl" is an aryl group I-SO 2 - whose aryl group is as described above.

"Arylsulfonylcarbamoyl" is an aryl-SO group₂-NH-C (= O) -, its aryl group is as described above.

"Arylthio" is an aryl 1-S- group whose aryl group is as described above. An exemplary arylthio group is phenylthio and naphthylthio.

"Azaheteroaryl" is an aromatic carbocyclic group containing 5 to 10 ring atoms, one of which is a nitrogen atom and the other selected from the group consisting of carbon, oxygen, sulfur and nitrogen; Examples of azaheteroaryl groups are benzimidazolyl, imidazolyl, indazolinyl, indolyl, isoquinolinyl, pyridyl, pyrimidinyl, pyrrolyl, quinolinyl, quinazolinyl and tetrahydroindolizinyl.

"Cyclic amine" is a 3- to 8-membered monocyclic cycloalkyl ring system wherein one of the ring carbon atoms is replaced by a nitrogen atom and which (i) may also contain another heteroatom-containing group, such as oxygen, sulfur, SO₂ or NY⁷ (where Y⁷ is hydrogen, alkyl, aryl, arylalkyl, -C (O) -R⁷, -C (= O) -OR⁷ or -SO₂R⁷); and (ii) may be linked to another aryl group (e.g., phenyl), heteroaryl (e.g., pyridyl), heterocycloalkyl or cycloalkyl to form a bicyclic or tricyclic ring system. An exemplary cyclic amine is pyrrolidine, piperidine, morpholine, piperazine, indoline, pyrindoline, tetrahydroquinoline and the like.

A "cycloalkenyl group" is a non-aromatic monocyclic or multicyclic ring system containing at least one carbon-carbon double bond and 3 to 10 carbon atoms. An exemplary monocyclic cycloalkenyl ring is cyclopentenyl, cyclohexenyl and cycloheptenyl.

"Cycloalkyl" is a saturated monocyclic or bicyclic ring system containing 3 to 10 carbon atoms optionally substituted by an oxo group. An exemplary monocyclic cycloalkyl ring is a C 3 -C 8 cycloalkyl group such as cyclopropyl, cyclopentyl, cyclohexyl and cycloheptyl.

A "cycloalkylalkyl group" is a cycloalkyl-alkyl group whose cycloalkyl and alkyl groups are as described above. Exemplary monocyclic cycloalkylalkyl groups are cyclopropylmethyl, cyclopentylmethyl, cyclohexylmethyl, and cycloheptylmethyl.

"Halogen" means a fluorine atom, a chlorine atom, a bromine atom or an iodine atom. Fluorine and chlorine atoms are preferred.

"Heteroaroyl" is a heteroaryl-C (= O) - group whose heteroaryl group is described below. An exemplary heteroaryl group is the pyridyl carbonyl group.

"Heteroaroylamino" is a heteroaroyl-ΝΗ- group whose heteroaryl group is described below.

"Heteroaryl group" as a group or part of a group is:

(i) an optionally substituted aromatic monocyclic or multicyclic organic group of 5 to 10 ring atoms, one or more of which is a non-carbon atom, such as nitrogen, oxygen or sulfur (examples of such groups are benzimidazolyl, benzothiazolyl, furyl) , imidazolyl, indolyl, indolizinyl, isoxazolyl, isoquinolinyl, isothiazolyl, oxadiazolyl, pyrazinyl, pyridazinyl, pyrazolyl, pyridyl, pyrimidinyl, pyrrolyl, quinazolinyl, quinolinyl, 1,3,4-thiadiazolyl, thiazolyl, thienyl and triazolyl, which are optionally substituted if: unless otherwise indicated, one or more aryl substituents as defined above);

(ii) an optionally substituted partially saturated multicyclic heterocarbocyclic group whose heteroaryl group and cycloalkyl group or cycloalkenyl group are joined to form a cyclic structure (examples of such groups are pyrindanyl groups optionally substituted with one or more "aryl substituents" as defined above, unless otherwise stated) . Optional substituents are, unless otherwise indicated, one or more of the "aryl group substituents" defined above.

"Heteroarylalkyl" means a heteroaryl 1-alkyl- group_? wherein the heteroaryl group and the alkyl group are as described above. Preferred heteroarylalkyl groups contain alkyl groups having 1 to 4 carbon atoms. An exemplary heteroarylalkyl group is pyridylmethyl.

"Heteroarylalkyloxy" is a heteroarylalkyl-Ό- group whose heteroarylalkyl group is as described above. An exemplary heteroarylalkyloxy group is an optionally substituted pyridylmethoxy group.

"Heteroaryloxy" is a heteroaryl group 1-0 whose heteroaryl group is as described above. An exemplary heteroaryloxy group is an optionally substituted pyridyloxy group.

"Heteroarylsulfonylcarbamoyl" is a heteroaryl-SO 2 -NH-C (= O) - group whose heteroaryl group is as described above.

"Heterocycloalkyl" means:

(i) a cycloalkyl group having 3 to 7 ring atoms, one or more heteroatoms or heteroatom-containing groups selected from the group consisting of oxygen, sulfur and NY⁷, and optionally may be substituted by oxo;

(ii) a partially saturated multicyclic heterocarbocyclic group, wherein each aryl (or heteroaryl) ring may optionally be substituted with one or more "aryl substituents", and a heterocycloalkyl group joined together to form a cyclic structure.

(Examples of such groups are chromanyl, dihydrobenzofuranyl, indolinyl and pyrindolinyl).

"Heterocycloalkylalkyl" means a heterocycloalkyl-alkyl group whose heterocycloalkyl and alkyl groups are as described above.

A "prodrug" is a compound that is convertible in vivo by metabolic means (e.g., hydrolysis) to a compound of Formula I, including its N-oxides. For example, an in vivo hydrolysis convertible to the parent compound may be an ester of a compound of Formula 1 that contains a hydroxyl group. Alternatively, in vivo hydrolysis convertible to the parent compound may be an ester of a compound of formula I that contains a carboxy group.

-12en 30175Ϊ bó

Suitable esters of the hydroxyl group-containing compounds of formula jsou are, for example, acetates, citrates, lactates, tartrates, malonates, oxalates, salicylates, propionates, succinates, fumarates, maleates, methylene-bis-p-hydroxynaphthoates, gentisates, isethionates, di-p-toluoyltartrate, methanesulfonates, ethanesulfonates, benzenesulfonates, p-toluenesulfonates, cyclohexylsulfamates and quinates.

Suitable esters of compounds of formula I containing a carboxy group are described, for example, in FJ Leinweber, DrugMetab. Res. 1987, 18, 379.

Suitable esters of the compounds of formula (I) are lactones formed by the elimination of water from said carboxyl group and hydroxyl group. Examples of such lactones are caprolactones and butyrolactones.

A particularly suitable group of esters of compounds of formula I containing a hydroxyl group can be prepared from the acids described by Bundgaard et al., J. Med. Chenr, 1989, 32, pages

2503-2507 and include substituted (aminomethyl) benzoates, for example dialkylaminomethylbenzoates, in which two alkyl groups may be either linked and / or interrupted by an oxygen atom or an optionally substituted nitrogen atom, for example an alkylated nitrogen atom, more specifically (morpholinomethyl) benzoates, for example 3- or 4- (morpholinomethyl) benzoates and (4-alkylpiperazin-1-yl) benzoates, for example 3- or 4- (4-alkylpiperazin-1-yl) benzoates.

If the compounds of the present invention contain a carboxyl group or a sufficiently acidic bioisoster, they may form base addition salts which are more convenient for use; in practice, the use of salt is actually equivalent to the use of free acid. Bases which can be used for the preparation of basic addition salts include those which, when reacted with the free acids, form pharmaceutically acceptable salts, i. salts whose cations are non-toxic to patients at a pharmaceutical dose such that the beneficial inhibitory effects of the free base are not impaired by the side effects of the cations. The pharmaceutically acceptable salts of the alkali and alkaline earth metals of the present invention are derived from the following bases: sodium hydride, sodium hydroxide, potassium hydroxide, calcium hydroxide, aluminum hydroxide, lithium hydroxide, magnesium hydroxide, zinc hydroxide, ammonia, ethylenediamine, N-methylglucamine, lysine, arginine, omithine, choline, Ν, Ν'-dibenzylethylenediamine, chloroprocaine, diethano lamin, procaine, N-benzylphenethylamine, diethylamine, piperazine, tris (hydroxymethyl) aminomethane, tetramethylammonium hydroxide and the like.

Certain compounds of the present invention are basic and suitable for use in the form of the free base or a pharmaceutically acceptable acid addition salt thereof.

Acid addition salts are more suitable for use, and in practice the use of a salt is substantially equivalent to the use of the free base. Acids which can be used for the preparation of acid addition salts suitably include those which, by the free base reaction, provide pharmaceutically acceptable salts, i.e. salts whose anions are nontoxic to the patient in a pharmaceutical dosage, so that the beneficial inhibitory effects of the free base are not impaired by side effects. anions. Although pharmaceutically acceptable salts of said basic compounds are preferred, all conventional acid addition salts are suitable as the source of the free base, although the particular salt itself is only desirable as an intermediate, such as when the salt is formed for purification and identification purposes only or used as an intermediate in the preparation of pharmaceutically acceptable salts by ion exchange. The pharmaceutically acceptable salts of the present invention are derived from mineral and organic acids and include hydrohalides such as hydrochloride and hydrobromides, sulfates, phosphates, nitrates, sulfamates, acetates, citrates, lactates, tartrates, malonates, oxalates, salicylates, propionates, succinates, fumarates, maleate, methylene-bis-p-hydroxynaphthoates, gentisates, isethionates, di-p-toluoyl tartrates, methanesulfonates, ethanesulfonates, benzenesulfonates, p-toluenesulfonates, cyclohexylsulfamates and quinates.

The salts of the present invention are suitable both as active compounds and for purification purposes, for example by utilizing the solubility differences between the salt and the parent compound, by-products and / or starting materials by techniques well known to those skilled in the art.

-13GB 301751 B6

The compounds of the present invention exhibit suitable pharmacological activity and are therefore used in pharmaceutical compositions and further used in the treatment of patients suffering from certain health problems. Therefore, the present invention provides, in a further aspect, the compounds of the present invention and compositions comprising them for use in therapy.

The compounds of the present invention block the catalytic activity of kinases according to the tests described in the literature and in vitro procedures described below. The results of these assays are considered to be consistent with pharmacological activity in humans and other mammals. Thus, in another embodiment, the present invention provides compounds of the present invention and compositions comprising them for use in treating patients suffering from conditions that can be improved by administration of protein kinase inhibitors (e.g., Syk, FAK, KDR or Aurora2). For example, the compounds of the present invention are useful in the treatment of inflammatory diseases such as asthma; inflammatory dermatoses (e.g., psoriasis, dermatitis herpetiformis, eczema, necrotization and cutaneous vasculitis, blisters); allergic rhinitis and allergic conjunctivitis; connective tissue inflammations including arthritis, rheumatoid arthritis and other arthritic conditions such as rheumatoid spondylitis, gout, traumatic arthritis, rubeolitic arthritis, psoriatic arthritis and osteoarthritis. The compounds are also useful in the treatment of chronic obstructive pulmonary disease (COPD), acute synovitis, autoimmune diabetes, autoimmune encephalomyelitis, colitis, atherosclerosis, peripheral vascular disease, cardiovascular diseases, multiple sclerosis, restenosis, myocarditis, lymphomas of the cell, lymphomas of the cell, lymphomas transplant rejection and associated problems, cancer and tumors (such as colorectal, prostate, breast, thyroid, intestines and lungs) and inflammatory bowel disease. In addition, the compounds are useful against tumor angiogenesis.

A special embodiment of the treatment method of the present invention is the treatment of asthma. Another special embodiment of the method of the present invention is the treatment of psoriasis.

Another special embodiment of the method of the present invention is the treatment of connective tissue inflammation.

Another particular embodiment of the method of the present invention is the treatment of inflammatory disease of the viscera.

A special embodiment of the treatment method of the present invention is the treatment of cancer and tumors,

Another object of the present invention is a method of treating a human or animal suffering from a condition that can be ameliorated by administering a protein kinase inhibitor (e.g. Syk, FAK, KDR or Aurora2), e.g., conditions described above, comprising administering an effective amount of a compound of the present invention or a composition comprising of the present invention to patients. "Effective amount" means an amount of a compound of the present invention capable of inhibiting the catalytic activity of a protein kinase, such as Syk, FAK, KDR or Aurora2, and thereby producing the desired therapeutic effect.

The term treatment herein includes prophylactic treatment as well as treatment of pre-existing conditions.

The present invention also encompasses pharmaceutical compositions comprising at least one compound of the present invention in association with a pharmaceutically acceptable carrier or excipient.

The compounds of the present invention may be administered by any suitable route. In practice, the compounds of the present invention may generally be administered parenterally, topically, rectally, orally or by inhalation, particularly orally.

-14GB 301/51 ti

The compositions of the present invention may be prepared by conventional procedures using one or more pharmaceutically acceptable excipients. Additives include, but are not limited to, diluents, sterile aqueous media, and various non-toxic organic solvents. The compositions may take the form of tablets, pills, granules, powders, aqueous solutions or suspensions, injectable solutions, beverages or syrups, and may contain one or more agents selected from the group consisting of sweetening, flavoring, coloring, or stabilizing agents to provide a pharmaceutically acceptable. preparation. The choice of carrier and determination of the amount of active agent in the carrier is generally determined by the solubility and chemical properties of the active compound, the particular mode of administration and pharmaceutical practice. For example, excipients such as lactose, sodium citrate, calcium carbonate, dibasic calcium phosphate and disintegrants such as starch, alginic acid and some complex silicates associated with lubricants such as magnesium stearate, sodium lauryl sulfate and talc may be used in the preparation of tablets. Lactose and high molecular weight polyethylene glycols are suitable for the preparation of the capsules. When aqueous suspensions are used, they may contain emulsifiers or suspending agents. Diluents such as sucrose, ethanol, polyethylene glycol, propylene glycol, glycols and chloroform or mixtures thereof may also be used.

For parenteral administration, emulsions, suspensions or solutions of the products of the present invention in vegetable oil, for example sesame oil, peanut oil or olive oil, or aqueous organic solutions such as water and propylene glycol, injectable organic esters such as ethyl oleate and sterile aqueous solutions are used. pharmaceutically acceptable salts. Salts of the products of the present invention are particularly suitable for administration by muscle or subcutaneous injection. Aqueous solutions also containing solutions of salts in pure distilled water may be used for intravenous administration, provided that their pH is appropriately adjusted to be buffered and isotonic with sufficient glucose or sodium chloride and sterilized by heat, irradiation or microfiltration,

Gels (water or alcohol based), creams or ointments containing the compounds of the present invention may be used for topical administration. The compounds of the present invention may also be in a gel or matrix for application in the form of a patch, allowing controlled release of compound 30 across the transdermal barrier.

For administration by inhalation, the compounds of the present invention are dissolved or suspended in a carrier suitable for use in a nebulizer or aerosol, or can be absorbed or adsorbed on a solid carrier suitable for use in a dry powder inhaler.

Solid compositions for rectal administration include suppositories which are prepared by known methods and contain at least one compound of the present invention.

The proportion of active ingredient in the composition of the present invention may vary, but must be such that the correct dosage is obtained. Of course, several dosage units can also be administered at the same time. The dose employed will be determined by the physician and will depend upon the desired therapeutic effect, the mode of administration, the duration of treatment and the condition of the patient. In adults, the dose is generally from 0.001 to 50, suitably from 0.001 to 5 mg / kg body weight per day by inhalation; when administered orally from 0.01 to 100, suitably from 0.1 to 70, more preferably from 0.5 to 10 mg / kg body weight per day; and intravenous administration from 0.001 to 10, suitably from 0.01 to 1 mg / kg body weight per day. In each particular case, the dose is determined according to features exhibited by the subject being treated, such as age, weight, general health, and other features that may affect the efficacy of the drug.

The compounds of the present invention may be administered as often as necessary to achieve the desired therapeutic effect. Some patients may respond quickly to a higher or lower dose and may require a much lower maintenance dose. In other patients, long-term treatment with 1 to 4 doses per day may be required, depending on the physiological requirements of each particular patient. The active product can generally be administered orally 1 to 4 times per day.

However, in some patients it may be necessary not to exceed 1 or 2 doses per day.

-15GB 301751 B6

The compounds of the present invention may be prepared by application or adaptation of known methods, by which the methods used or those described in the literature are used, for example RC Larock, Comprehensive Organic Transformations, VCH publishers, 1989.

In the reactions described below, it may be necessary to protect reactive functional groups, for example, hydroxy, amino, imino, thio or carboxy, if these are desired in the final product to prevent their undesired participation in the reactions. Conventional protecting groups may be utilized in accordance with conventional practice, for example see U.S. Pat. TW Green and PGM Wuts, "Protective Groups in Organic Chemistry", John Wiley and Sons, 1991.

Compounds of formula I wherein R 1¹, R² and R³ are as defined above, and X¹ is a nitrogen atom or a CH group, may be prepared by application or adaptation of the procedures described in Davis et al., Tetrahedron, 1992, 48, pages 939-952, for example:

(i) reaction of a compound of formula III:

X¹ 2 xs (III)

N where R² and R³ are as defined above and X¹ is nitrogen or CH, with a suitable base such as lithium diisopropylamide (or butyllithium) in an inert solvent such as tetrahydrofuran at a temperature of from -26 ° C;

(ii) reaction of the resulting anion with a nitrile of formula IV:

R &amp; apos; -CN (IV), wherein R &amp; apos;¹ is as defined above, at a temperature of from -15 ° C to room temperature.

This process is very suitable for the preparation of compounds of formula I, wherein R is¹ R 3 is an optionally substituted N-methylindol-3-yl group, R 3⁵ and R³ are hydrogen and X¹ is nitrogen or CH.

Compounds of formula I wherein R 1¹, R², R³ and X¹ as defined above, may also be prepared by application or adaptation of the procedures described by Chang and Bag, J. Org. Chem_L, 1995, 21, pages 7030-7032, for example by reaction of a compound of formula V:

<img file="CZ301751B6_D0003.tif" />

where R¹, R², R³ and X¹ are as defined above and X² is a halogen atom, suitably iodine, or triflate, with a boronic acid of formula VI:

R'-B (OH)₂ (VI),

- 16lz 30i75i Bo where R¹ is a group as defined above. The coupling reaction can be advantageously performed, for example, in the presence of a complex metal catalyst such as tetrakis (triphenylphosphine) palladium (0), and sodium bicarbonate in aqueous dimethylformamide at a temperature up to the boiling point of the mixture.

The compounds of the present invention may also be prepared by interconversion of other compounds of the present invention.

For example, a carboxy-containing compound of formula I may be prepared by hydrolysis of the corresponding ester. Hydrolysis may conveniently be carried out alkaline using a base such as an alkali metal hydroxide such as lithium hydroxide or an alkali metal carbonate such as potassium carbonate in the presence of an aqueous / organic solvent mixture using an organic solvent such as dioxane, tetrahydrofuran or methanol, e.g. temperature from room temperature to boiling point. The ester hydrolysis can also be carried out in an acidic manner using an inorganic acid such as hydrochloric acid in the presence of an aqueous / inert organic solvent mixture using an organic solvent such as dioxane or tetrahydrofuran at a temperature of from 50 to 80 ° C.

Another example of the preparation of a compound of formula I containing a carboxy group is the acid-catalyzed removal of the t-butyl group of the corresponding t-butyl ester using standard reaction conditions, for example by reaction with trifluoroacetic acid at room temperature.

Another example of the preparation of a compound of formula I containing a carboxy group is the hydrogenation of the corresponding benzyl ester. The reaction may be carried out in the presence of ammonium formate and a suitable metal catalyst, for example palladium, on an inert support such as coal, preferably in a solvent such as methanol or ethanol at a temperature around the boiling point of the mixture. Alternatively, the reaction may be carried out in the presence of a suitable metal catalyst, for example platinum or palladium, optionally anchored on an inert support such as coal, preferably in a solvent such as methanol or ethanol.

As an example of interconversion, compounds of formula I containing the group - ^ (“ΟΙ-ΝΥ'ΝΥ) can be used²prepared by coupling a compound of formula I containing a carboxy group with an amine of formula HNY^lY² to obtain an amide bond using standard peptide synthesis procedures, for example, by coupling in the presence of O- (7-azabenzotriazol-1-yl-1,1,3,3-tetramethyluronium hexafluorophosphate and tri35 ethylamine (or diisopropylethylamine) in tetrahydrofuran (or dimethylformamide) at room temperature. Coupling can be accomplished by reacting a carboxy-containing compound of formula I with N - {(dimethylamino) (1 H -1,2,3-triazolo [4,5- b] pyridin-1-yl) methylene} -N-methylmethanaminium hexafluorophosphate N-oxide in the presence of a suitable base such as diisopropylethylamine in an inert solvent such as dimethylformamide at room temperature and subsequent reaction with an amine of formula HNY y (ammonium chloride may be used to prepare a compound of formula I containing a -C (= O) -NH 2 group) .

As another example of preparation by interconversion, compounds of formula I containing a -CH group can be prepared₂OH by reducing the corresponding compound of formula 1 containing a -CHO group or a -CO group₂R⁷ (where R⁷ is lower alkyl). For example, the reduction can be conveniently performed by reaction with lithium aluminum hydride in an inert solvent such as tetrahydrofuran at room temperature to the boiling point of the mixture.

Another example of the interconversion preparation is the preparation of a compound of formula I, wherein R is¹ is aryl or heteroaryl substituted with -CO₂Me, where Me means methyl:

(i) reacting a compound of formula I wherein R 1¹ is aryl or hydroxy substituted heteroaryl, with N-phenyltrifluoromethanesulfonimide in the presence of a suitable base such as triethylamine, in an inert solvent such as dichloromethane at -78 ° C;

- 17) 301751 B6 (ii) by reacting the resulting triflate with carbon monoxide in the presence of a suitable catalyst (e.g. palladium acetate), 1,3-bis (diphenylphosphino) propane, triethylamine and methanol in an inert solvent such as dimethylformamide at a pressure of 100 kPa (1) atm) at room temperature.

This process is particularly suitable for the preparation of compounds of formula I, wherein R is^l is 5-carboxymethyl-N-methylindol-3-yl.

Another example of the interconversion preparation is the preparation of a compound of formula I, wherein R is¹10 is an aryl or heteroaryl group substituted with -SO₂NY 'Y²:

(i) reacting a compound of formula I wherein R 1¹ is aryl or heteroaryl substituted by hydroxy, with N-phenyltrifluoromethanesulfonimide as described above;

(ii) reacting the resulting triflate with a t-butyl dipstick in the presence of i-sodium butoxide, palladium acetate, lithium chloride and R (+) - 2,2'-bis (diphenylphosphino) -1,1-b-naphthyl in an inert solvent such as is toluene, at a temperature of 110 to 120 ° C;

(iii) reacting the resulting compound of formula I wherein R 1^l is an aryl or heteroaryl group substituted with -S'Bu, wherein Bu is butyl with trifluoroacetic acid and mercuric acetate in an inert solvent such as toluene at room temperature followed by reaction with sulfane;

(iv) reacting the resulting compound of formula I, wherein R 1¹ is aryl or heteroaryl substituted with -SH, with chlorine in aqueous acetic acid at room temperature;

(v) reacting the resulting compound of formula I wherein R 1¹ is aryl or heteroaryl substituted with -SO₂C1, with an amine of formula ΗΝΥΎ².

Another example of the interconversion preparation is the preparation of a compound of formula I, wherein R is¹is an aryl or heteroaryl group substituted with an aryl (or heteroaryl) group, by reaction of a compound of formula I wherein R is¹ is an aryl or heteroaryl group substituted with a hydroxy group, with N-phenyltrifluoromethanesulfonimide as described above, followed by reacting the resulting triflate with the aryl (or heteroaryl ester) boronoyl acid in the presence of a suitable catalyst (e.g. tetrakis (triphenylphosphine palladium) and aqueous sodium bicarbonate is dimethylformamide, at a temperature of 120 to 150 ° C.

Another example of the interconversion preparation is the preparation of a compound of formula I, wherein R is^l is an aryl or heteroaryl group substituted by a hydroxy group, by reacting the corresponding compound of formula I wherein R * is an aryl or heteroaryl group substituted by a methoxy group with a Lewis acid such as boron tribromide in an inert solvent such as dichloromethane at 0 ° C to room temperature.

Another example of the interconversion preparation is the preparation of a compound of formula I, wherein R is¹is aryl or heteroaryl substituted with -OR⁴, may be prepared by alkylation of the corresponding compound of formula I, wherein R 1¹ is aryl or heteroaryl substituted with hydroxy, a compound of formula (VII);

R⁴-X³ (VIII), where R⁴ is defined above and X³ is a halogen atom, preferably bromine, or a tosyl group, using standard alkylation conditions. For example, the alkylation may be carried out in the presence of a base such as an alkali metal carbonate (e.g. potassium carbonate or cesium carbonate), an alkoxide

- 18GB 301751 An alkali metal (for example potassium t-butoxide) or alkali metal hydride (for example sodium hydride) in dimethylformamide or dimethylsulfoxide at a temperature of from 0 to 100 ° C.

Alternatively, the compounds of formula I, wherein R 1, can be used¹ is an aryl group or a heteroaryl group sub-5 substituted with -OR⁴, can be prepared by reacting the corresponding compound of formula I, wherein R¹ is aryl or heteroaryl substituted with hydroxy with the corresponding alcohol of formula VIH;

R⁴-OH (VIII), where R⁴ is defined above, in the presence of a triarylphosphine such as triphenylphosphine, and a dialkylacetylenedicarboxylate, such as diisopropylacetylenedicarboxylate or dimethylacetylenedicarboxylate, in an inert solvent such as toluene at room temperature. This process is particularly suitable for the preparation of compounds of formula I, wherein R is¹ is a heteroaryl group substituted with -OR⁴.

Another example of the interconversion preparation is the preparation of a compound of formula I, wherein R is¹is aryl or heteroaryl substituted with -OR⁴where R⁴ is a propyl group substituted with a hydroxy group, by reaction of the corresponding compound of formula I, wherein R is¹ is aryl or heteroaryl substituted with -OR⁴where R⁴ is a propenyl group, with borane and subsequent reaction with hydrogen peroxide in the presence of sodium hydroxide. This process is particularly suitable for the preparation of compounds of formula I, wherein R is¹ is an indolyl group substituted with -OCH₂CH (CH₃OH and -OCH 2 CH 2 -CH 2 OH.

Another example of the interconversion preparation is the preparation of a compound of formula I wherein R * is aryl or heteroaryl substituted with -OR⁴where R⁴ is a 1,3-dihydroxyalkylene group, by reaction of the corresponding compound wherein R is⁴ is an alkenyl group, with osmium tetroxide in the presence of 4-methylmorpholine-N-oxide. The reaction may conveniently be carried out in an inert solvent such as acetone at room temperature.

Another example of the interconversion preparation is the preparation of a compound of formula Ia, wherein R 1⁹is alkyl, alkenyl, cycloalkyl, heterocycloalkyl or alkyl substituted with -CloO O-NY ^;², -OR⁷, - &lt;(= O) -OR⁵, -NY * Y²alkylating the corresponding compound of formula Ia, wherein R⁹ is a hydrogen atom corresponding to the halide of formula IX:

RX⁴ (IX), wherein R⁹ is alkyl, alkenyl, cycloalkyl, heterocycloalkyl or alkyl substituted with -C (^ O) NY'Y², -OR⁷, group

-C (= O) -OR⁵, -NY * Y², and X⁴ is a halogen atom, preferably a bromine atom, using standard alkylation conditions, such as those described above.

Another example of preparation by interconversion is the preparation of a compound of formula I containing the group -N (R 3)⁶) -I (= O) -NY³Y⁴where R⁶ and Y³ are hydrogen and Y⁴ is defined above, by reacting the corresponding amino-containing compound of formula I with an isocyanate of formula OC = NY⁴ in an inert solvent such as tetrahydrofuran at room temperature.

As another example of the interconversion preparation, the preparation of a compound of formula I containing sulfoxide linkages by oxidation of the corresponding compound containing the -S- linkages. For example, this oxidation may conveniently be carried out by reaction with a peroxyacid such as 3-chloroperbenzoic acid, suitably in an inert solvent such as dichloromethane, suitably at or near room temperature, or alternatively with potassium hydrogen peroxosulfate in a solvent such as aqueous methanol buffered to pH 5 0 ° C to room temperature. This second method is preferred for compounds containing acid labile groups.

- 19GB 301751 B6

As another example of the interconversion preparation, the preparation of a compound of formula I containing sulfone linkages can be prepared by oxidation of the corresponding compounds containing -S- or sulfoxide linkages. For example, the oxidation may conveniently be carried out by reaction with a peroxyacid, for example 3-chloroperbenzoic acid, suitably in an inert solvent, for example dichloromethane, suitably at or near room temperature.

As another example of the interconversion preparation, the preparation of a compound of formula I containing a cyano group may be prepared by reaction of a corresponding compound of formula I containing a group -C (= O) NH₂ with phosphorus pentachloride in the presence of triethylamine. The reaction may conveniently be carried out in an inert solvent such as tetrahydrofuran at the boiling point of the mixture.

As another example of the interconversion preparation, the preparation of a compound of formula I containing a tetrazolyl group by reaction of the corresponding compound of formula I containing a cyano group with azidotributyltin. The reaction may conveniently be carried out in an inert solvent such as toluene at the boiling point of the mixture.

Another example of the interconversion preparation is the preparation of a compound of formula Ϊ, where R²is a fluorine atom, by reaction of the corresponding compound of formula I, wherein R is² is a hydrogen atom, with methylmagnesium bromide (in an inert solvent such as tetrahydrofuran, at a temperature of about 0 ° C) and subsequent reaction with 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo [2.2.2] octanebis (tetrafluoroborate) ) at 0 ° C to the boiling point of the mixture.

The compounds of the present invention may contain asymmetric centers. These asymmetric centers may be independently in either the R or S configuration. Those skilled in the art will appreciate that some of the compounds of the present invention may also exhibit geometric isomerism. It is to be understood that the present invention includes the individual geometric isomers and stereoisomers and mixtures thereof including the racemic mixtures of the compounds of Formula 1 described above. These isomers may be separated from their mixture by the application or adaptation of known methods, for example chromatographic techniques and recrystallization techniques, or prepared separately from the corresponding 30 isomers of their intermediates,

In another aspect of the invention, the free base can be prepared by reacting the free base with a suitable acid by applying or adapting known methods of the acid addition salt of the compounds of the present invention. For example, acid addition salts of the compounds of the present invention may be prepared either by dissolving the free base in water or an aqueous alcoholic solution or other suitable solvent containing the appropriate acid and isolating the salt by evaporating the solution, or by reacting the free base with an acid in an organic solvent to separate the salt directly; is obtained by concentrating the solution.

The acid addition salts of the compounds of the present invention may be regenerated from the salts by application or adaptation of known methods. For example, the parent compounds of the present invention can be regenerated from their acid addition salts by treatment with a base, for example an aqueous sodium bicarbonate solution or an aqueous ammonia solution.

The compounds of the present invention can be regenerated from their base addition salts by application or adaptation of known methods. For example, the parent compounds of the present invention can be regenerated from their base addition salts by treatment with an acid, such as hydrochloric acid.

The compounds of the present invention may conveniently be prepared or prepared by the process of the present invention as solvates (e.g. hydrates). Hydrates of the compounds of the present invention may conveniently be prepared by recrystallization from an aqueous / organic solvent mixture using an organic solvent such as dioxane, tetrahydrofuran or methanol.

In another aspect of the present invention, the base addition salts of the compounds of the present invention can be prepared by reacting the free acid with a suitable base using or adapting known methods.

Of the invention. For example, the base addition salts of the compounds of the present invention may be prepared either by dissolving the free acid in water or an aqueous alcoholic solution or other suitable solvent containing a suitable base and isolating the salt by evaporating the solution, or by reacting the free acid and base in an organic solvent. is obtained by concentrating the solution.

The starting materials and intermediates may be prepared by application or adaptation of known methods, for example those described in the Reference Examples or obvious chemical equivalents thereof.

Compounds of formula IV, wherein R 1 is R 1¹ as defined above, may be prepared by reacting the corresponding compound of formula 1:

R &amp; apos; -CHO (1), wherein R &amp; apos;¹ is defined above, with hydroxylamine hydrochloride in an inert solvent such as dimethylformamide at a temperature of about 150 ° C.

Compounds of formula IV wherein R¹ is a group of formula IIIa, wherein R 1¹⁰ and p are as defined above and R⁹ is alkyl, alkenyl, cycloalkyl or alkyl substituted with -C (= O) NY^lN², -OR⁴, -C (= O) -OR 1, -NY^lY², may be prepared by alkylation of the corresponding 1 H -indole of formula IV, wherein R 1¹ is a group of formula IIa, wherein R is¹⁰ and p are as defined above and R⁹ is a hydrogen atom, with the corresponding (optionally substituted) alkyl halide, alkenyl halide or cycloalkyl halide using standard alkylation conditions. For example, the alkylation may be carried out in the presence of a base such as an alkali metal carbonate such as potassium carbonate or an alkali metal hydride such as sodium hydride in an inert solvent such as dimethylformamide or dimethyl sulfoxide at room temperature to 100 ° C.

Compounds of formula IV wherein R¹ is a 5,6,7,8-tetrahydroindolizin-1-yl group, the following may be prepared:

(i) reacting piperidine-2-carboxylic acid with formic acid and acetic anhydride at room temperature;

(ii) reacting the resulting sodium 1-formalpiperidine-2-carboxylate with 4-toluenesulfonyl chloride 35 in an inert solvent such as dichloromethane at room temperature;

(iii) reaction with acrylonitrile in the presence of triethylamine at room temperature.

Compounds of formula 1 wherein R 1¹ as defined above, forms of the leftover compound of formula 2 may be prepared:

R &amp; apos; -H (2) wherein R &amp; apos;¹ is defined above, using standard reaction conditions, for example using a Vilsmeier-Haack formylation reaction with phosphorus pentoxide in dimethylformamide.

This process is particularly useful in the preparation of compounds of formula 1 wherein R 1¹ is an optionally substituted N-methylindol-3-yl group.

-21 GB 301751 B6

Compounds of formula V wherein R², R³ and X¹ are as defined above and X² is an iodine atom, iodinated compounds of formula 3 can be prepared:

<img file="CZ301751B6_D0004.tif" />

where R², R³ and X¹ are defined above. Iodination may conveniently be accomplished by application or adaptation of Procedure 5 described by Saulníer and Gribble, J. Org. Chem., 1982, 47, 1982, for example by reacting a compound of Formula 3 with lithium diisopropylamide in an inert solvent such as tetrahydrofuran at -78 ° C followed by reaction of the resulting anion with iodine. This reaction is conveniently carried out with an NH group of an indole protected, for example, with a tosyl group.

Compounds of formula 3, wherein R 1², R³ and X¹ as defined above, may be prepared by cyclization of compounds of formula 4:

<img file="CZ301751B6_D0005.tif" />

(4),

CHO where R², R³ and X¹ are defined above. The cyclization reaction may conveniently be carried out in the presence of an alkali metal alkoxide such as sodium ethoxide in an inert solvent such as ethanol at room temperature to the boiling point of the mixture.

Compounds of formula 3 wherein R³ and X¹ are as defined above and R² is a hydrogen atom, may be prepared by cyclization of a compound of formula 5:

<img file="CZ301751B6_D0006.tif" />

1T OEt where R³ and X¹ are as defined above and Et is ethyl. The cyclization reaction may conveniently be carried out in the presence of sodamide in N-methylaniline at a temperature of 120 to 200 ° C.

-22GB BH75i Bo

Compounds of formula 3 wherein R³ and X¹ are as defined above and R² is methyl (or C 1 -C 4 alkyl optionally substituted with -Z'R)⁸where Z¹ and R⁸are defined above), may be prepared by cyclizing compounds 6:

<img file="CZ301751B6_D0007.tif" />

where R³ and X¹ are as defined above, R¹¹ is hydrogen (or C 1 -C 3 alkyl optionally substituted with -Z)^lR⁸where Z¹ and R⁸ are as defined above) and X⁵is a halogen atom, suitably a bromine atom or a triflate group. The cyclization may conveniently be carried out in the presence of a complex metal catalyst such as tetrakis (triphenylphosphine) palladium (0), a tertiary amine such as triethylamine, and a triarylphosphine such as triphenylphosphine in an inert solvent such as dimethylformamide at 60-120 ° C. This process is particularly suitable for the preparation of compounds of formula 3, wherein R is³ and X¹ are as defined above, X¹ is nitrogen and R is² is C-CH₃.

Compounds of formula 3 wherein R³, R² and X¹ are defined above, you can prepare:

(i) reaction of a compound of formula 7:

<img file="CZ301751B6_D0008.tif" />

(7), where R³ and X¹ are as defined above and X⁶ is a halogen atom, preferably iodine, with acetylene of formula 8:

R²-CsC-SiMe₃ (8), where R² is defined above, in the presence of a complex metal catalyst such as dichloro [1,1'-bis (diphenylphosphino) phercocene] palladium complex, lithium chloride and sodium carbonate in an inert solvent such as dimethylformamide at a temperature of up to 100 ° C.

(ii) desilylation.

Compounds of formula 4 wherein R², R³ and X¹ as defined above, may be prepared by reacting a compound of formula 9:

^ / \ ^ ch₂r²

<img file="CZ301751B6_D0009.tif" />

(9), where R², R³ and X * are as defined above, with a mixture of formic acid and acetic anhydride.

-23EN 301751 B6

Compounds of formula 5 wherein R^J and X¹ as defined above, may be prepared by reacting the corresponding compound of formula 9, wherein R 1³ and X¹ are as defined above and R² is a hydrogen atom, with triethyl orthoformate, in the presence of an acid catalyst, such as hydrogen chloride, in ethanol at room temperature to the boiling point of the mixture.

Compounds of formula wherein R³, R¹¹ and X¹ are as defined above and X⁵ is a halogen atom, alkylating compounds of formula (7) wherein R @ 1 may be prepared³, X¹ and X⁶ are as defined above, with a suitable alkenyl halide of formula 10:

io R¹ 1 -CHCH-CH 2 X⁷ (10), where R¹¹ is defined above and X⁷ is a halogen atom, suitable for bromine. The alkylation may conveniently be carried out in the presence of an alkyl metal hydride such as sodium hydride in an inert solvent such as tetrahydrofuran at room temperature.

Compounds of formula 7 wherein R³ and X¹ are as defined above and X⁶ is a bromine atom, can be prepared by bromination of the compound of formula 11:

NH, (11), where R³ and X¹ are as defined above in dimethylsulfoxide.

Compounds of formula 7 wherein R³ and X¹ are as defined above and X⁵ is an iodine atom, iodinated compounds of formula 11 can be prepared wherein R is³ and X¹ are defined above. The iodination can be accomplished by application or adaptation of the procedure from the WW publication. Sy, Syn / A Comm., 1992, 22, pp. 3215-3219.

Compounds of formula V wherein R¹, R², R³ and X¹ are as defined above and X⁵ is a triflate group, may be prepared by reacting a compound of formula 12:

<img file="CZ301751B6_D0010.tif" />

where R², R³ and X¹ are defined above, with triflyl anhydride in the presence of Huníg's base in an inert solvent such as dichloromethane at a temperature of about 0 ° C. This reaction is conveniently carried out with an NH group of an indole protected, for example, with a tosyl group.

-24GB 301751 Bo

Compounds of formula 12 wherein R², R³ and X¹ as defined above, may be prepared by reacting a compound of formula 13:

<img file="CZ301751B6_D0011.tif" />

(13), where R³ and X¹ are as defined above, with metachloroperbenzoic acid in an inert solvent, such as dichloromethane, at a temperature of about 5 ° C. This reaction is conveniently carried out with an NH group of an indole protected, for example, with a tosyl group.

Compounds of formula 13 wherein R³ and X¹ as defined above, may be prepared by reacting a compound of Formula 14:

<img file="CZ301751B6_D0012.tif" />

(14), where R³ and X¹ are defined above, with lithium diisopropylamide in an inert solvent such as tetrahydrofuran, followed by reaction with dimethylformamide at a temperature of about -78 ° C. This reaction is conveniently carried out with an NH group of an indole protected, for example, with a tosyl group.

Compounds of formula 14 wherein R 1³ and X¹ as defined above, may be prepared by reacting a compound of formula 7 wherein R 1³ and X¹ are as defined above and X⁶ is an iodine atom, with trimethylsilylacetylene in the presence of a complex metal catalyst, such as dichloro- [1,1'-bis (diphenylphosphino) ferrocene] palladium (II) complex, followed by desylation.

Compounds of formula VI wherein R¹ as defined above, may be prepared by reacting a compound of Formula 15:

R'-X⁸ (15), where R¹ is defined above and X⁸ is a halogen atom, suitably bromine, in the presence of tributyl borate with a suitable base such as butyllithium in an inert solvent such as tetrahydrofuran at a temperature of about -100 ° C.

Compounds of formula VI wherein R^l is defined above. It can also be prepared by reacting a compound of formula 15, wherein R 1¹ is defined above and X⁸ is -HgOAc, where Ac is acetyl, with a borane in an inert solvent such as tetrahydrofuran at room temperature.

Compounds of formula 15 wherein R 1¹ is an optionally substituted indol-3-yl group and X⁸ is a bromine atom, may be prepared by reacting an optionally substituted indole with bromine in an inert solvent such as dimethylformamide at room temperature.

-25GB 301751 B6

Compounds of formula 13 wherein R¹ is an optionally substituted indol-3-yl group and X⁸ is a group

-HgOAc, may be prepared by reacting an optionally substituted indoline with mercuric acetate in glacial acetic acid at room temperature.

DETAILED DESCRIPTION OF THE INVENTION

The present invention is further illustrated, but not limited, by the following examples and reference examples.

io

400 MHz 1 H nuclear magnetic resonance (NMR) spectra were measured on a Varian Unity INOVA instrument. In nuclear magnetic resonance (NMR) spectra, chemical shifts (δ) are expressed in ppm relative to tetramethylsilane. Abbreviations used have the following meanings: s - singlet; d = doublet; t = triplet; m = multiplet; q = quadruplet; dd = doublet of doublets;

ddd = doublet of doublets of doublets.

HPLC retention times_T) were measured:

Method A: Phenomenex C18 column (150 x 4.6 mm), eluting with a gradient of acetonitrile / water with 0.1% trifluoroacetic acid (0 to 1 minute 5% acetonitrile; minute increase to 95% acetonitrile; 12 to 14.95 minutes 95% acetonitrile; 14.95-15 minutes (0% acetonitrile); or Method B: YMC ODS-AQ column (2 x 50 mm) eluting with a gradient of acetonitrile / water with 0.1% formic acid [95/5 / 0.1% (A) to 5/95 / 0.1% (B)] at a flow rate of 0.4 ml / min); or method C: gradient elution of acetonitrile / water with 0.1% formic acid (95/5 / 0.1%, water / acetonitrile / formic acid, 0.1 min, linear gradient to 5/95 / 0.1% , water / acetonitrile / formic acid in 2 min to 3.5 min).

Thin Layer Chromatography (TLC, R_F) was measured on Merck silica gel films,

Example 1 (a) 6- (5-Methoxy-1-methyl-1 H -indol-3-yl) -5 H -pyrrolo [2,3- b] pyrazine

To a stirred solution of 59.9 mL of diisopropylamine in 1400 mL of tetrahydrofuran was added 131 mL of a 1.6 M solution of n-butyllithium in hexane over 25 minutes at -15 ° C under a nitrogen atmosphere while maintaining the temperature below -10 ° C. The mixture was stirred for 30 minutes and then added over 15 minutes

26.8 g of methyl pyrazine, stirred for 1 hour and then a solution of 53 g of 5-methoxy-1-methyl-1H-indole-3-carbonitrile [Reference Example 1 (a)] in 600 ml of tetrahydrofuran is added while maintaining the temperature below 5 ° C. The reaction mixture was allowed to warm to room temperature over 2 hours, allowed to stand overnight, and then 100 mL of water was added. The tetrahydrofuran was then removed in vacuo and the residue was partitioned between 500 mL of ethyl acetate and 200 mL of water. The layers were separated and the aqueous layer was extracted with 200 mL ethyl acetate. The combined organic layers were washed with 500 ml of water and then evaporated. The residue was chromatographed on silica gel eluting with dichloromethane / methanol (19: 1, v / v) to give 19.4g of the title compound as a gray solid, mp 270-272 ° C. Mass Spectrum: 279 (MH +).

(b) In a similar manner to that described in Example 1 (a) above, but using 1-methylindole-3-carbonitrile [Reference Example 2 (b)], 6- (1-methyl-1 H -indole) was prepared. 3-yl) -5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, mp 264-266 ° C. [Elemental analysis: C, 72.34; H, 4.68; N, 22.28%. Calcd₁₅H_]2N₄: C, 72.56; H, 4.87; N, 22.57%].

(C) In a similar manner to that described in Example 1 (a) above, but using 3-bromobenzonitrile, 6- (3-bromophenyl) -5 H -pyrrolo [2,3- b] pyrazine was prepared. 247 DEG-249 DEG C. Mass spectrum: 276 (MH @ +).

(d) In a similar manner to that described in Example 1 (a) above, but using 2-isobutylpyrazine and benzonitrile, 7-isopropyl-6-phenyl-5H-pyrrolo [2,3-a] pyrazine was prepared as a colorless solid mp 216-218 ° C. Mass spectrum: 238 (MH +).

(e) In a similar manner to that described in Example 1 (a) above, but using 4-bromo-benzo nitrile, 644-bromo-phenyl} -5,7-pyrrolo [2,3-b] pyrazine was prepared as a colorless solid at temperature mp 326-329 ° C. Mass Spectrum: 276 (MH +).

(f) In a similar manner to that described in Example 1 (a) above, but using 2- (4-cyanophenyl) -1,3-dioxane (prepared according to U.S. Patent Application No. 5,750,723, e.g.

3a) 6- (4- (1,3) dioxan-2-ylphenyl) -5 H -pyrrolo [2,3- b] pyrazine is obtained as a yellow solid, m.p. 288-289 ° C. layer: R_F = 0.3 (ethyl acetate / pentane: 1/1).

(g) In a similar manner to that described in Example 1 (a) above, but using 2- (3-cyano20 phenyl) -1,3-dioxane (prepared as described in US Patent Application No. 5,750,723, e.g. 3a) ) 6- (3- (1,3) dioxan-2-ylphenyl) -5 H -pyrrolo [2,3- b] pyrazine was obtained as a yellow solid, m.p. 205-206 ° C. H, 5.46; N, 15.02% Calculated for C 14 H 14 Cl 2: C, 68.31; H, 5.37; N, 14.94%.

(h) In a similar manner to that described in Example 1 (a) above, but using 2-quinolinecarbonitrile, 2- (5H-pyrrolo [2,3-a] pyrazin-6-yl) quinoline was prepared in the form of light yellow solid, m.p. 293-295 ° C. Mass Spectrum: 247 (MH +). [Elemental analysis: C, 72.76; H, 3.82; N, 22.56%. Calculated for C,₆Hi_WITHN₃O₂: C, 73.16; H, 4.09; N, 22.56%].

(i) In a similar manner to that described in Example 1 (a) above, but using 3-isoquinolinecarbonitrile, 3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) isoquinoline was prepared as green m.p. 281-285 ° C. Mass Spectrum: 247 (MH +).

(j) In a similar manner to that described in Example 1 (a) above, but using 1-methyl-1 H -indole-5-carbonitrile [Reference Example 2 (c)], 6- [1-methyl] was prepared. 1 H-Indol-5-yl] -5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, m.p. 260-265 ° C. Mass spectrum: 249 (MH +).

(k) In a similar manner to that described in Example 1 (a) above, but using 2,6-dimethyl-40 pyrazine, 6- (5-methoxy-1-methyl-1H-indol-3-yl) - 2-methyl-5 H -pyrrolo [2,3- b] pyrazine as a yellow solid Mass spectrum: 293 (MH +) 1 HNMR [(CD)₃)₂SO]: δ 12.2-12.3 (1H, broad s); 8.54, 8.56 (2x, 1H, s); 7.50 (1H, d, J = 8.9 Hz); 7.47 (1H, d, J = 2.4Hz); 6.96 (1H, dd, J = 8.9 and 2.4 Hz); 6.91 (1H, s); 3.91, 3.87 and 2.57 (3x 3H, s).

(1) In a similar manner to that described in Example 1 (a) above, but using 2,5-dimethylpyrazine and 1-methyl-1 H -indole-3-carbonitrile [Reference Example 2 (c)], prepare 3-Methyl-6- (1-methyl-1H-indol-3-yl) -5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, m.p. 170-175 ° C. Mass Spectrum: 263 (MH +).

(m) In a similar manner to that described in Example t (a) above, but using 1-benzyl-5-methoxy-1H-indole-3-carbonitrile [Reference Example 2 (g)], 6- (1-benzyl- 5-Methoxy-1H-indol-3-yl] -5H-pyrrolo [2,3-b] pyrazine as a yellow solid, m.p. 240 DEG-244 DEG C. Thin layer chromatography: Rt_F = 0.5 (dichloromethane / methanol: 19/1).

(N) In a similar manner to that described in Example 1 (a) above, but using 1-methyl-1 H -pyrrole-3-carbonitrile [Reference Example 2 (i)], 6 - (1-methyl-1H-pyrrol-3-yl) -5H-pyrrolo [2,3-b] pyrazine as a yellow solid, m.p. 211-213 ° C. Mass spectrum: 199 ( MH⁺).

(o) In a similar manner to that described in Example 1 (a) above, but using 1-methyl-1H-pyrrole-2-carbonitrile [Reference Example 2 (j)], 6- (1-methyl-1H-pyrrole) was prepared. -2-yl] -5 H -pyrido [2,3- b] pyrazine as a yellow solid, m.p. 208 DEG-209 DEG C. Mass spectrum: 199 (MH @ +).⁴).

(p) In a similar manner to that described in Example 1 (a) above, but using indolizine-1-carbonitrile [Reference Example 5], 6-indolizin-1-yl-57 H -pyrrolo [2,3- b] was prepared. mp pyrazine as a yellow solid, m.p. 224-225 ° C (dec.). Mass Spectrum: 235 (MH +);⁴).

(q) In a similar manner to that described in Example 1 (a) above, but using 3-methylindolizine-1-carbonitrile [Reference Example 6], 6- (3-methylindolizine-1) -57 / pyrrolo was prepared. [2,3-b] pyrazine as a yellow solid, m.p. 233-235 ° C (dec.). Mass Spectrum: 249 (MH +);⁴).

(r) In a similar manner to that described in Example 1 (a) above, but using 1-methyl-5-phenyl-1 H -pyrrole-3-carbonitrile [Reference Example 2 (k)], 6- (1-methyl) was prepared. 1-5-Phenyl-17 (pyrrol-3-yl) -5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, m.p. 221-222 ° C (dec.). Mass Spectrum: 275 (MH +)⁴).

(s) In a similar manner to that described in Example 1 (a) above, but using 5,6,7,8-tetrahydroindolizine-1-carbonitrile [Reference Example 8], 6- (5,6,7,8) was prepared. -tetrahydroindolizin-1-yl-5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, m.p. 236-238 ° C (dec.) Mass spectrum: 239 (MH +)⁺).

(t) In a similar manner to that described in Example 1 (a) above, but using 3-furonitrile, 6-furan-3-yl-57 H -pyrrolo [2,3- b] pyrazine was prepared as an orange solid . Mass Spectrum: 186.79 (MH +)⁴). Thin layer chromatography: R_F = 0.45 (dichloromethane / methanol: 19/1).

(u) In a similar manner to that described in Example 1 (a) above, but using 4-N, N-dimethylaminobenzonitrile, dimethyl [4- (5H-pyrrolo [2,3-7] pyrazin-6-yl) was prepared. phenyl] amine as a yellow solid, m.p. 297-298 ° C (dec.). Mass Spectrum: 239 (MH +);⁺).

(v) In a similar manner to that described in Example 1 (a) but using ethylpyrazine, 6- (5-methoxy-1-methyl-1H-indol-3-yl) -7-methyl-57- pyrido [2,3-b] pyrazine as a yellow solid, m.p. 243-244 ° C. HPLC (Method A): Rt_T = 6.73 minutes.

(w) In a similar manner to that described in Example 1 (a) above, but using 4-t-butylbenzonitrile, 6- (4-t-butylphenyl) -57H-pyrrolo [2,3-7] pyrazine was prepared. as a yellow solid. LCMS: Rt_T = 3.29 minutes; 252 (MH +)⁺).

(x) In a similar manner to that described in Example 1 (a) above, but using 2-ethylpyrazine and 4-t-butylbenzonitrile, 6- (4'-t-butylphenyl} -7-methyl-5 H -pyrrolo) was prepared. [2,3-7] pyrazine as a yellow solid, m.p. 213 DEG-214 DEG C. Mass spectrum: 266 (MH @ +).⁴).

(y) In a similar manner to that described in Example 1 (a) above, but using 3,4-dimethoxybenzonitrile, 6- (3,4-dimethoxyphenyl) -5 H -pyrrolo [2,3- b] pyrazine was prepared. m.p. 212-214 ° C. Mass Spectrum: 256 (MH +);⁴).

(Z) In a similar manner to that described in Example 1 (a) above, but using 2-ethylpyrazine and 4-aminobenzonitrile, 6- (4-aminophenyl) -7-methyl-5 H -pyrrolo is prepared. [2,3-d] pyrazine as a brown solid, m.p. 330 DEG-332 DEG C. Mass spectrum: 225 (MFf).

(aa) In a similar manner to that described in Example 1 (a) above, but using 4- (1-methyl) ethoxybenzonitrile [Reference Example 51], 6- [4- (1-methyl) ethoxyphenyl pyrrolo [ 2,3-δ] pyrazine as a yellow solid. Mass Spectrum: 254 (MH +)⁺). HPLC (Method B): R t = 1.64 minutes.

(ab) In a similar manner to that described in Example 1 (a) above, but using 1 H-5-cyano-1-methyl-2-methylthioimidazole [Reference Example 52], 6- (1 H-1) is prepared. methyl 2- (methylthio) imidazol-5-yl) -5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, m.p. 230 ° C. Mass spectrum: 246 (MH +).

(ac) In a similar manner to that described in Example 1 (a) above, but using 3-cyano-T-methyl-1 H -indazole [Reference Example 56 (a)], 6- (1-methyl-1) is prepared. (Tindazol-3-yl) -57] pyrrolo [2,3-b] pyrazine as a yellow solid. Mass spectrum: 250 (MH +), 248 (MH +).^l@ 1 H NMR₃)₂SO]: δ 12.5-12.6 (IH, broad s); 8.38 (1H, d, J = 2.4 Hz); 8.24 (d, 1H,

J = 7.9 Hz); 8.21 (s, 1H, J = 2.4 Hz); 7.76 (d, 1H, J = 8.1 Hz); 7.48 (t, 1H); 7.32 (t, 1H); 7.29 (s, 1H); 4.18 (s, 3H).

(ad) In a similar manner to that described in Example 1 (a) above, but using 3-cyano-1-methyl-1-phenyl-1 H -pyrrole [Reference Example 56 (b)], 6-O-methyl-1-phenyl was prepared 1 H (pyrrole-3-yl) -5 H -pyrrolo [2,3- b] pyrazine as a solid, m.p. 195 ° C (dec.). Mass Spectrum: 275 (MH +).

(ae) In a similar manner to that described in Example 1 (a) above, but using 4-fluorobenzonitrile, 6- (4-fluorophenyl) -5H-pyrrolo [2,3-d] pyrazine was prepared as an off-white solid.

1 HNMR [(CD₃)₂SO]: δ 12.3 (s, 1H), 8.4 (d, IH), 8.2 (d, IH), 8.05 (d, 2H), 7.4 (d, 2H), 7 2 (s, 1H). Mass spectrum; 213 (MH &amp; lt; + &amp; gt;).

(af) In a similar manner as described in Example 1 (a) above but using 4-methoxybenzonitrile, 6- (4-methoxyphenyl) -5 H -pyrrolo [2,3- a] pyrazine was prepared as off-white m.p. 244-246 ° C. Mass spectrum: 225 (MFf).

(ag) In a similar manner to that described in Example 1 (a) above, but using 4- (t-butyl) benzonitrile and 4- (pyrazinyl) -1-butene [Reference Example 59], 6- [4] was prepared. - (t-butyl) phenyl] 7- (propenyl) -5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, m.p.

208 Deň: 32 ° C. Mass spectrum: 292 (MH +).

(ah) In a similar manner to that described in Example 1 (a) above but using 4- (methylthio) benzonitrile, 6- (4-methylthiophenyl) -5 H -pyrrolo [2,3- b] pyrazine was prepared. as a yellow solid. Mass Spectrum: 242 (MH +). @ 1 H NMR₃)₂SO]: δ 12.48 (1H, s); 8.37 (1H, s);

8.18 (1H, s); 7.98 (2H, d, J = 7.9Hz); 7.19 (2H, d, J = 7.9Hz); 7.11 (1H, s); 2.52 (3H, s), (ai) In a similar manner to that described in Example 1 (a) above, but using 3-methoxybenzonitrile, 6- (3-methoxyphenyl) -5H-pyrrolo [2] was prepared. 3- (pyrazine) as an orange solid, m.p. 194-196 ° C. Mass spectrum: 226 (MH +).

(aj) In a similar manner to that described in Example 1 (a) above, but using 1-methyl-4-cyanopyrazole (prepared according to the method described in Yoshida, J. flet. Cfcem., 1995, 32, page 701), Preparation of 6- (1-methyl-1H-pyrazol-4-yl) -5H-pyrrolo [2,3-d] pyrazine as an orange solid, m.p. 232-234 ° C. Mass Spectrum: 200 (MH +).

(Ak) In a similar manner to that described in Example 1 (a) above, but using 1-methyl-3-cyano-5-phenylpyrazole [Reference Example I (k)], 6- (1-methyl) is prepared. -5-phenyl-1H-pyrazol-3-yl) -5H-pyrrolo [2,3-b] pyrazine as an orange solid, m.p. 222-223 ° C, HPLC Ry - 7.36 minutes.

(a1) In a similar manner to that described in Example 1 (a) above but using 2-cyanopyridine, 6- (pyridin-2-yl) -5 H -pyrrolo [2,3- a] pyrazine was prepared as yellow solid, m.p. 234-235 ° C. 1 H NMR [(CDCl 3) δ: δ 8.71 (1H, d, J = 4.1 Hz); 8.38 (1H, s); 8.24 (1H, s); 8.17 (1H, d, J = 8.2 Hz), 7.93 (1H, t, J = 8.2 Hz), 7.41 (1H, m), 7.36 (1H, s).

(am) In a similar manner to that described in Example t (a) above, but using 4-cyanopyridine, 6-(pyridin-4-yl) -5 H -pyrrolo [2,3- a] pyrazine was prepared as yellow mp 324-326 ° C. @ 1 H NMR .delta₃)₂SO]; δ 8.69 (2H, d, J = 7.1 Hz); 8.45 (1 H, s); 8.33 (1 H, s); 8.00 (2H, d, J = 7.1Hz); 7.47 (1 H, s).

Example 2 (a) 3- [3- (5H-Pyrrolo [2,3-b] pyrazin-6-yl) -indol-1-yl] -propan-1-ol

To a solution of 29 g of 6- {1- [3- (Z-butyldimethylsiloxy) propyl] -1 H -indol-3-yl} -5 H -pyrrolo [2,3- b] pyrazine [Reference Example 3 ( a)] in 500 ml of tetrahydrophirane, 144 ml of a 1.0 M solution of tetrabutylammonium fluoride in tetrahydrofuran was added under a nitrogen atmosphere. The mixture was stirred at room temperature for 4 hours and then concentrated in vacuo. Water was added to the residue to obtain a solid which was filtered, then washed with water and then dried to give 17.5 g of the title compound as a tan solid, m.p. 220-221 ° C. Mass spectrum: 293 (MH +).

(b) In a similar manner to that described in Example 2 (a) above, but using 6- {1- [3- (z-butyldimethylsilyloxy) propyl] -5-methoxy-1 H -indol-3-yl} -5- tert -pyrrolo [2,3-b] pyrazine [Reference Example 3 (b)] was prepared 3- [5-methoxy-3- (5H-pyrrolo [2,3- b] pyrazine-6)]. 1-yl) indol-1-yl] propan-1-ol as a yellow solid, m.p. 225-228 ° C. Mass Spectrum: 323 (MH +);⁺). Thin layer chromatography: R_F = 0.16 (dichloromethane / methanol: 19/1).

(c) In a similar manner to that described in Example 2 (c) above, but using 6- {1- [2- (t-butyl 135 dimethylsilyloxy) ethyl] -1 H -indol-3-yl} -5 // -pyrrolo [2,3-b] pyrazine [Reference Example 3 (c)], 2- [3- (5H-pyrrolo [2,3-b] pyrazin-6-yl) indol-1-yl] was prepared. yl] ethanol as a yellow solid, m.p. 272-273 ° C. Mass Spectrum: 279 (MH +).

(d) In a similar manner to that described in Example 2 (a) above, but using 6- {1- [2- (t-butyl 140 dimethyl] silyloxy) ethyl] -5-methoxy-1 H -indole-3 -yl} -5 H -pyrrolo [2,3- b] pyrazine [Reference Example 3 (d)], 2- [5-methoxy-3- (5 H) -pyrrolo [2,3- b] [pyrazin-6-yl] indol-1-yl] ethanol as a gray solid, m.p. 270-273 ° C. Mass Spectrum: 309.43 (MH +)⁺).

Example 3 (a) 3- [3- (5H-Pyirolo [2,3-b] pyrazin-6-yl) indol-1-yl] propylamine

To a solution of 12 g of 3- [3- (5H-pyrrolo [2,3-a] pyrazin-6-yl) indol-1-yl] propan-1-ol [Example 2 (a)] 50 and 19.1 g of carbon tetrabromide in 300 ml of dichloromethane is added a solution of 12.9 g of triphenylphosphine in 100 ml of dichloromethane over 5 minutes at room temperature. After stirring at room temperature for 3 hours, the reaction mixture was filtered and the solid was washed with small portions of dichloromethane.

The filtrate was evaporated to give a brown glue which was mixed with 80 ml of liquid ammonia in a sealed pressure vessel and stirred at room temperature for 18 hours. The vessel is then cooled to

-78 ° C and then gently aerate. The ammonia was allowed to evaporate and the residue was purified by chromatography

-30GB 301751 Bo on silica gel eluting with dichloromethane / methanol and concentrated ammonia (900: 100: 7, v / v) to give 3 g of the title compound as a yellow solid, mp 170 ° C, 1 H NMR [(CD)₃)₂SO]: δ 8.28 (1H, d, J = 2.7Hz); 8.18 (1 H, s); 8.10, 7.64 (2x 1H, d, J = 7.7 Hz); 8.09 (1H, d, J = 2.7Hz); 7.29, 7.23 (2x 1H, td, J = 7.1 and 1.0 Hz); 6.97 (1 H, s); 4.32 (2H, t, J = 7.0Hz); 2.57 (2H, t, J = 6.5Hz); 1.89 (2H, quintet, J = 6.4 Hz).

(b) In a similar manner to that described in Example 3 (a) above, but using 3- [5-methoxy-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) indol-1] [Yl] propan-1-ol [Example 2 (b)], 3- [5-methoxy-3- (5H-pyrrolo [2,3-Z)] pyrazin-6-yl) indole was prepared. propyl amine as a yellow solid, m.p. 95-100 ° C and 150-160 ° C. Mass Spectrum: 322 (MH +);⁺). Thin layer chromatography: R_F = 0.2 (dichloromethane / methanol / concentrated ammonia: 900/100/7 , v / v).

Example 4

N- {3- [3- {57H-Pyrrolo [2,3-b] pyrazin-6-yl) -indol-1-yl] -propyl} -acetamide

To a solution of 100 g of 3- [3- (5H-pyrrolo [2,3-6] pyrazin-6-yl) indol-1-yl] propylamine [Example 3 (a)] is added dropwise at room temperature and under a nitrogen atmosphere. add 31 μΐ of acetyl chloride and 52,2 μΐ of triethylamine and 20 ml of dichloromethane. The mixture was stirred at room temperature for 24 hours and then evaporated. The residue was purified by silica gel chromatography eluting with dichloromethane / methanol (9: 1, v / v) to give 82 mg of the title compound as a yellow solid, mp 260 ° C. Mass Spectrum: 334 (MH +)⁴).

Example 5 (a) 6- [1- (3-Morpholin-4-yl-propyl) -1H-indol-3-yl] -5H-pyrrolo [2,3-b] pyrazine

A mixture of 250 mg of 3- [3- (5/7-pyrrolo [2,3-b] pyrazin-6-yl) indol-1-yl] propyl bromide [Reference Example 4], 0.5 ml of morpholine, 100 mg of potassium carbonate and 2 crystals of potassium iodide are heated to boiling in ethyl methyl ketone for 2 hours. The mixture was then allowed to cool to room temperature over 16 hours and then evaporated. The residue was chromatographed on silica gel eluting with dichloromethane / methanol (9: 1, v / v) to give a yellow glass which was overlaid with ethyl acetate and pentane to give 40 mg of the title compound as a yellow solid, m.p. 180-185 °. C. Mass Spectrum: 362 (MH +);⁴).

(b) In a similar manner to that described in Example 5 (a) above, but using piperidine, 6- [1- (3-piperidin-1-yl-propyl) -1 H -indol-3-yl] was prepared. 5 H -pyrrolo [2,3- b] pyrazine as a yellow solid, m.p. 240 ° C. Mass Spectrum: 360 (MH +)⁴).

Example 6

6- {1- [3- (Pyridin-3-yloxy) propyl] -1 H -indol-3-yl} -5 H -pyrrolo [2,3- b] pyrazine

To a solution of 359 mg of triphenylphosphine in 2.5 ml of tetrahydrofuran at 0 ° C under nitrogen atmosphere was added dropwise a solution of 269 μis of diisopropyl azodicarboxylate in 0.5 ml of tetrahydro-furan over 2 minutes. The mixture was stirred at the same temperature for 20 minutes and then a solution of 65 mg of 3-hydroxypyridine in 1 ml of tetrahydrofuran (1 ml) was added over 1 minute followed by a suspension of 200 mg of 3- [3- (5H-pyrrolo [2,3-b]]. [pyrazin-6-yl] indol-1-yl] propan-1-ol [Example 2 (a)] in 2 mL of tetrahydrofuran. The mixture was allowed to warm to room temperature over 18 hours and then evaporated. The residue was purified by silica gel chromatography eluting with ethyl acetate / methanol (9: 1, v / v) to give 110 mg.

The title compound is a yellow solid, mp 208-209 ° C. Mass Spectrum: 370 (MH +);⁺).

Example 7

1-Methyl-3- (5H-pyrrolo [2,3-b] pyridin-6-yl) -17H-indol-5-ol

A mixture of 200 mg of 6- (5-methoxy-1-methyl-1H-indol-3-yl) -5H-pyrrolo [2,3-a] pyrazine [Example 1 (a)], 500 μ 500 48% hydrobromic acid and 3 ml of glacial acetic acid were heated at reflux for 14 hours. After cooling, the mixture was neutralized by the addition of saturated sodium bicarbonate solution, the resulting dark solid was collected by filtration, and then dried to give 180 mg of the title compound as a black solid, mp 289-290 ° C. Mass Spectrum: 264 (MH +)⁺).

Example 8

6- (2-Chloro-5-methoxy-1-methyl-1H-indol-3-yl) -5H-pyrrolo [2,3-a] pyrazine

To a solution of 100 mg of 6- (5-methoxy-1-methyl-1 H -indol-3-yl) -5 H -pyrido [2,3- d] pyrazine [Example 1 (a)] in 25 mL of dimethoxyethanol When cooled to -78 ° C, add 172 μΐ of a 2,5 M solution of n-butyllithium in hexane. The mixture was stirred with 82 mg of 4-toluenesulfonyl chloride for 30 minutes and then slowly warmed to room temperature and then evaporated. The residue was chromatographed on silica gel eluting with dichloromethane / methanol (19: 1, v / v) to give 45 mg of the title compound as a black solid. Mass Spectrum: 313 (MH +);⁺). 1 HNMR [(CD₃)₂SO]: δ 12.20 (1H, s); 8.39 (1H, d, J = 3Hz); 8.21 (1 H, d, J = 3 Hz); 7.54 (1H, d, J = 9 Hz); 7.30 (1H, d, J = 2Hz); 6.96 (1H, dd, J = 9 and 2 Hz); 6.84 (1H, d, J = 2Hz); 3.82 (3 H, s); 3.81 (3 H, s).

Example 9 (a) 3- (5H-Pyrrolo [2,3-b] pyrazin-6-yl) benzaldehyde

To a solution of 1.6 g of 6- (3- (1,3) dioxan-2-ylphenyl) -5H-pyrrolo [2,3-a] pyrazine [Example 1 (g)] in 50 ml of dichloromethane is added 5 The mixture was heated to boiling for 6 hours, allowed to cool overnight and then evaporated The residue was overlaid with diethyl ether to give a yellow solid which was recrystallized from ethyl acetate to give 0.6 g of the title compound. m.p. 268-270 ° C. [Elemental analysis: C, 69.96; H, 3.92; N, 18.69%. Calcd₁₃H₉N₃O: C, 69.95; H, 4.06; N, 18.82%].

(b) By a similar procedure to that described in Example 9 (a) above, but using 6- (4- [1,3] dioxan-2-ylphenyl) -5,7-pyrrolo [2,3-a] pyrazine [Example] 1 (f)], 4- (5H-pyrrolo [2,3-f] pyrazin-6-yl) benzaldehyde hydrate is obtained as a yellow solid, m.p. &amp; gt; 295 ° C. [Elemental analysis: C, 67.57; H, 4.33; N, 18.04%. Calculated for Ci₃H₉N₃OH₂O: C, 67.23; H, 4.34; N, 18.09%].

Example 10 (a) [3- (5H-Pyrrolo [2,3-b] pyrazin-6-yl) phenyl] methanol

To a suspension of 0.4 g of 3- (5H-pyrrolo [2,3-b] pyrazin-6-yl) benzaldehyde [Example 9 (a)] in ethanol 55 (50 ml) was added 200 ml of sodium borohydride and the mixture was Stir for 1 hour at temperature

Then, 10 ml of water are added and then evaporated. The solid residue was overlayed with 50 mL of water to give a pale yellow solid which was washed with water and then recrystallized from methanol to give 0.35 g of the title compound as a yellow crystalline solid, m.p. 225-226 ° C. [Elemental analysis: C, 68.72; H, 4.73; N, 18.44%. Calcd₎₃HnN₃O: C,

69.32; H, 4.92; N, 18.65%].

(b) In a similar manner to that described in Example 10 (a) above, but using 4- (5H-pyrroio [2,3-b] pyrazin-6-yl) benzaldehyde [Example 9 (b)], 4 (5H-pyrrolo [2,3-b] pyrazin-6-yl) -phenyl] -methanol as a yellow solid, m.p. 284-285 ° C. [Elemental analysis: C, 68.61; H, 4.65; N, 18.28. Calculated for Ci₃H, iN₃O: C, 69.32; H, 4.92; N, 18.65%].

They did

6- (5-Methoxy-1 H -indol-3-yl) -5 H -pyrrolo [2,3- b] pyrazine

To a solution of 50 mg of 6- (1-benzyl-5-methoxy-1 H -indol-3-yl) -5 H -pyrrolo [2,3- b] pyrazine [Example 1 (m)] in 20 ml of cooled tetrahydrofuran 20 ml of liquid ammonia and then 100 mg of sodium are added at -78 ° C. The mixture was stirred at -78 ° C for 30 minutes, then slowly warmed to room temperature, then 50 mL of water was added and the mixture was then extracted three times with 50 mL of ethyl acetate. The combined extracts were dried over sodium sulfate and then evaporated. The residue was overlaid with diethyl ether to give 14 mg of the title compound as a brown solid, mp 268-271 ° C; 265.24 (MH +).

Example 12

2- [5-Methoxy-3- {5H-pyrrolo [2,3-b] pyrazin-6-yl) indol-1-yl] -1-morpholin-4-ylethanone

To a stirred solution of 70 mg of 6- (5-methoxy-1 H -indol-3-yl) -5 H -pyrrolo [2,3- b] pyrazine [Example 11] in 10 mL of dry dimethylformamide was added 21.6 mg sodium hydride (60% dispersion in mineral oil). The mixture was stirred for 30 minutes and then a solution of 44.1 mg of 4- (2-chloroacetyl) morpholine in 1 ml of dimethylformamide was added and stirring was continued for a further 3 hours. The reaction mixture is poured into 20 ml of water and then extracted three times with 30 ml of ethyl acetate. The combined extracts were dried over sodium sulfate and then evaporated. The residue was overlaid with diethyl ether to give 55 mg of the title compound as a yellow solid, mp 263-267 ° C. Mass spectrum; 392.21 (MH +).

Example 13 (a) [5-Methoxy-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -indol-1-yl] -acetic acid

A mixture of 4.67 g of {5-methoxy-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-245-yl] indol-1-yl} -acetic acid ethyl ester [ Reference Example 13 (a)], 250 ml of methanol and 25 ml of 5M aqueous potassium hydroxide were heated to boiling for 7 hours. The methanol was removed under reduced pressure and 20 ml of water was added to the residue and the pH of this solution was adjusted to 7 by addition of concentrated hydrochloric acid. The resulting yellow solid was collected by filtration and chromatographed on silica gel eluting with ethyl acetate / methanol (7: 3, v / v) to give 1.69 g of the title compound as a white solid. Mass spectrum: 320 (MH +). HPLC (Method A): Rt_T = 6.67 minutes.

(b) In a similar manner to that described in Example 13 (a), but using 4-methoxy-2- (5-methoxy-1-methyl-1H-indol-3-yl) -1- (toluene-4- sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 2 (1)] was prepared 4-methoxy-2- (5-methoxy-1-methyl-1H-indol-3- yl) -1H-33US 301751 B6 pyrrolo [2,3-b] pyridine as a tan solid, m.p. 288 DEG-289 DEG C. Mass spectrum: 307 (MH @ +).⁺).

(c) In a similar manner to that described in Example 13 (a), but using 4-methoxy-2- (55-methoxy-1 H -indol-3-yl) -1- (toluene-1-sulfonyl) -1 H- 4-methoxy-2- (5-methoxy-1-methyl-1 H -indol-3-yl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 39] [2,3-δ] pyridine as a tan solid, m.p. 294-295 ° C. Mass Spectrum: 294 (MH +);⁺).

(d) In a similar manner to that described in Example 13 (a), but using 4-chloro-2- (4-t-butylphenyl) -1- (toluene-4'-sulfonyl) -1H-pyrrolo [2] 3-δ] pyridine [Reference Example 12 (j)] was prepared 4-chloro-2- (4-t-butylphenyl) -1 H -pyrrolo [2,3- b] pyridine as a cream colored solid. Thin layer chromatography: R_F Melting point = 0.71 (ethyl acetate / heptane 1: 1)₃)₂SO]: δ 12.52 (1H, s); 8.16 (1H, d, J = 6.1Hz); 7.93 (2H, d, J = 8.1Hz); 7.50 (2H, d, J = 8.1Hz); 7.21 (1H, d, J = 6.1 Hz); 6.96 (1 H, s); 1.30 (9 H, s).

(e) In a similar manner to that described in Example 13 (a), but using 2- (5-methoxy-linyl-1H-indol-3-yl) -5-phenyl-1- (toluene-4- sulfonyl) -1 H -pyrrolo [2,3- f] pyridine [Reference Example 13 (j)] was prepared 2- (5-methoxy-1-methyl-1 H -indol-3-yl) -17 p-pyrrolo [2,3-b] pyridine as a cream colored solid, m.p. 240-242 ° C. Mass Spectrum: 354 (MH +)⁺).

Example 14 (a) 2 - {[5-Methoxy-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) indol-1-yl] -1-morpholin-4-yl} ethanone

To a suspension of 60 mg of [5-methoxy-341H-pyrrolo [2,3-b] pyridin-2-yl) -indol-1-yl] -acetic acid [Example 13 (a)] in 7 ml of dry dimethylformamide is added 71 mg of N - {(dimethylamino) (1 H 30 1,2,3-triazolo [4,5- b] pyridin-1-yl) methylene} -N-methylmethanammonium hexafluorophosphate-Noxide and 45 µl diisopropylethylamine. The mixture is stirred at room temperature for 30 minutes, then 18 μΐ of morpholine is added and the mixture is stirred at room temperature for a further 12 hours. The solvent was removed in vacuo and the residue was suspended in saturated sodium bicarbonate solution. The resulting precipitate was collected by filtration and dried to give 10 mg of the title compound as a violet solid, m.p. 243-247 ° C. Mass Spectrum: 391 (MH +)^4-).

(b) In a similar manner to that described in Example I4 (a), but using 1- [1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H] -indol-5-yloxy Cyclobutanecarboxylic acid [Example 15 (c)] and ammonium chloride, 1- [1-methyl-3- (1H-pyrrolo [2,3-b] pyridin-2-) amide was prepared. 1) -1 H -indol-5-yloxy] cyclobutanecarboxylic acid as a light purple solid, m.p. 267-268 ° C. Mass Spectrum: 361 (MH +);⁺).

(c) In a similar manner to that described in Example 14 (a) above, but using 1- [1-methyl-3 (1H-pyrrolo [2,3-b] pyridin-2-yl) -1] 1H-indol-5-yloxy Cyclobutanecarboxylic acid [Example

15 (c)] and methylamine, 1- [1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indol-5-yloxyCyclobutanecarboxylic acid methylamide is prepared m.p. 249-250 ° C. Mass Spectrum: 375 (MH +);⁺).

(d) In a similar manner to that described in Example 14 (a) above, but using 1-methyl 1-350 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H- Indole-5-carboxylic acid [Example 15 (d)] and methylamine, 1-methyl-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -1 H -methylamide was prepared. indole-5-carboxylic acid as a light orange solid, m.p. 186 ° C. Mass Spectrum: 304 (MH +);⁺).

(E) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1H-pyrrolo [2,3-a] pyridin-2-yl) -1 1 H -indole-5-carboxylic acid [Example 15 (d)] and ethanolamine, 1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2) (2-hydroxyethyl) amide was prepared 1 H -1-indole-5-carboxylic acid as a yellow solid, m.p. 256-257 ° C.

Mass Spectrum: 335 (MH +);⁴).

(f) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole - 5-carboxylic acid [Example 15 (d)] α-2-aminoethylmorpholine, 1-methyl-3- (1H-pyrrolo [2,3-a] pyrimidine- (2-morpholin-4-ylethyl) amide was prepared.

2-yl) -1 H -indole-5-carboxylic acid as a colorless solid, m.p. 268-270 ° C. Mass Spectrum: 404 (MH +);⁴).

(g) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole 5-carboxylic acid [Example 15 (d)] and β-alanine-15 amide, 1-methyl-3- (1H-pyrrolo [2,3-b] pyridine-2- (2-carbamoylethyl) amide) was prepared. yl) - Hindole-5-carboxylic acid as a colorless solid, m.p. 286-288 ° C. Mass Spectrum: 362 (MH +);⁴).

(h) In a similar manner to that described in Example 14 (a) above but using 1-methyl 1-320 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H- indole-5-carboxylic acid [Example 15 (d)] and diethanolamine, 1-methyl-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -bis- (2-hydroxy-ethyl) -amide was prepared -1 H -indole-5-carboxylic acid as a yellow solid, m.p. 230-232 ° C. Mass Spectrum: 379 (MH +)⁴).

(i) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1 H -pyrrolo [2,3- f] pyridin-2-yl) -1 H- indole-5-carboxylic acid [Example 15 (d)] and ammonium chloride, 1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole amide is prepared -5-carboxylic acid as a yellow solid, m.p. 330-325 ° C. Mass Spectrum: 291 (MH +);⁴).

(j) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1 H -pyrrolo [2,3- d] pyridin-2-yl) -1 H- of indole-5-carboxylic acid [Example 15 (d) and tris (hydroxymethyl) aminomethane, (2-hydroxy-1,1-bishydroxymethylethyl) amide is prepared

1-Methyl-3- (1H-pyrrolo [2,3-d] pyridin-2-yl) -1H-indole-5-carboxylic acid as a yellow solid, m.p. 205-206 Deň: 32 ° C. Mass Spectrum: 395 (MH +)⁴).

(k) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-1-3 (1H-pyrrolo [2,3-b] pyridin-2-yl] -1H-indol- 5-carboxylic acids [Example 15 (d)] a

2-amino-2-methyl-1,3-propanediol, 1-methyl-3- (1 H -pyrrolo [2,3- b] 2-hydroxy-1-hydroxymethyl-1-methylethyl) 40 amide is prepared. d] pyridin-2-yl) -1 H -indole-5-carboxylic acid as a yellow solid, m.p. 180-182 ° C. Mass Spectrum: 379 (MH +)⁴).

(1) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1H-pyrrolo [2,3-a] pyridin-2-yl) -1H-indole -5-carboxylic acids [Example 15 (d)] and 3-amino-1,2-propanediol, 1-methyl-3- (1H-pyrrolo [2,3-d] pyrrolo [2,3-d] hydroxy-propyl) -amide was prepared. -6] pyridin-2-yl) -1H-indole-5-carboxylic acid as a yellow solid, m.p. 171-172 ° C. Mass Spectrum: 365 (MH +);⁴).

(m) In a similar manner to that described in Example 14 (a) above, but using 1-methyl 1-350 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H- indole-5-carboxylic acid [Example 15 (d)] and 2-amino-2-methyl-1-propanol, 1-methyl-3- (1H-pyrrolo) (2-hydroxy-1,1-dimethylethyl) amide was prepared [2,3-b] pyridin-2-yl) -1 H -indole-5-carboxylic acid as a yellow solid, mp 161-162 ° C. Mass Spectrum: 365 (MH +);⁴).

(N) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-1-3 (1H-pyrrolo [2,3-Z)] pyridin-2-yl} -; -indole-5-carboxylic acid [Example 15 (d)] and serinol, 1-methyl-3- (1 H -pyrrolo [2,3- b] pyridine-2-hydroxy-1,1-hydroxymethyl-ethyl) -amide was prepared. (l) -1 H -indole-5-carboxylic acid as a yellow solid, m.p.

179 Deň: 32 ° C. Mass Spectrum: 365.41 (MH +)⁺).

(o) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole Of 6-carboxylic acid [Example 15 (g)] and 3-aminopropionamide hydrochloride, 1-methyl-1-3- (1 H -pyrrolo [2,3- b] pyridine-2- (2-carbamoylethyl) amide) was prepared. yl) -1 H -indole-6-carboxylic acid as a light yellow solid, m.p. 277-280 ° C. Mass Spectrum: 362 (MH +).

(p) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indole- Of 6-carboxylic acid [Example 15 (g)] and ethanol 15 amine, 1-methyl-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indole (2-hydroxyethyl) amide was prepared -6-carboxylic acid as a brown solid, m.p. 264-267 ° C. Mass Spectrum: 335 (MH +).

(q) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-320 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H- indole-6-carboxylic acid [Example 15 (g)] and 1H- [1,2,4] triazol-3-ylamine, prepare (1H- [1,2,4] triazol-3-yl) amide 1 methyl-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indole-6-carboxylic acid as a light yellow solid, m.p. 343-345 ° C. Mass Spectrum: 358 (MH +).

(r) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole Of 6-carboxylic acid [Example 15 (g)] and serinol, 1-methyl-3- (1H-pyrrolo [2,3-6] pyridin-2y) (2-hydroxy-1-hydroxymethyl-ethyl) -amide was prepared 1 H -indole-6-carboxylic acid as a light brown solid, m.p. 247-249 ° C. Mass Spectrum: 365 (MH +).

(s) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5,7-pyrrolo [2,3-a] pyrazin-6-yl) -1H-indole -5-carboxylic acids [Example 15 (i)] and 2-amino-2-methyl-1-propanol, 1-methyl-3- (5 H -pyrrolo [2 H] 2-hydroxy-1,1-dimethylethyl) amide was prepared. 3- (6-pyrazin-6-yl) -1 H -indole-5-carboxylic acid as a yellow solid, m.p. 210-214 ° C. Mass Spectrum: 364 (MH +).

(t) In a similar manner to that described in Example 14 (a) above, but using 3- [6- (4-t-butylphenyl) -5 H -pyrrolo [2,3- b] pyrazine-7- yl] propionic acid [Example 25 (a)] and methylamine, 3- [6- (4-t-butylphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl] -N- methylpropionamide as an off-white solid, m.p. 222-228 ° C, mass spectrum: 337 (MH +).

(u) In a similar manner to that described in Example 14 (a) above, but using 3- [6- (4-t-butylphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl)] propionic acid [Example 25 (a)] and dimethylamine, 3- [6- (4-t-butylphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl] -N, N-dimethylpropionamide was prepared 203 DEG-204 DEG C. Mass spectrum: 351 (MH @ +).

(v) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole- Of 5-carboxylic acid [Example 151] α-2-methoxyethylamine, 1-methyl-3- (5H-pyrrolo [2,3-b] pyrazin-6-yl] 50H-indole 2-methoxyethylamide was prepared -5-carboxylic acid as an orange solid: 350 (MH +)⁺). HPLC (Method C): Rt_T = 1.27 minutes.

(w) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole- Of 5-carboxylic acid [Example 15 (i)] and 2-thien-5-ylethylamine, 1-methyl-3- (5H-pyrrolo [2,3-a] pyrazine-2-thien-2-ylethylamide) was prepared. 6-36 (3075 B) yl] -1 H -indole-5-carboxylic acid as a yellow solid Mass spectrum: 402 (MH +) HPLC (Method C): R_T = 1.45 minutes.

(x) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-35 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole Of -5-carboxylic acid [Example 15 (i)] and 2-fluoroethylamine, 1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1-2-fluoroethylamide is prepared N-indole-5-carboxylic acid as an orange solid MS: 338 (MH +) HPLC (method C): R_T= 1.30 minutes.

io (y) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-1-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H- 1-methyl-3- (5H-pyrrolo [2,36] pyrazin-6-yl) -1-indole-5-carboxylic acid [Example 15 (i)] and alanine ethyl ester hydrochloride were prepared. 1-indole-5-carboxylic acid as an orange solid Mass spectrum: 392 (MH +) HPLC (method C): R_T - 1.38 minutes.

(z) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole- Of 5-carboxylic acid [Example 15 (i)] and methyl ester hydrochloride, 1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H- (1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl)) - Indole-5-carboxylic acid as an orange solid Mass spectrum: 394 (MH +) HPLC (method C): R t = 1.24 min.

(aa) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole Of 5-carboxylic acid [Example 15 (i)] and ethanolamine, 1-methyl-3- (5H-pynolo [2,3-6] pyrazin-6-yl] -1-2-hydroxyethylamide is prepared_JRf 25 Indole-5-carboxylic acid as a yellow solid, m.p. 171-173 ° C (dec.). Mass spectrum: 336 (MH +).

(ab) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole ~ 5-carboxylic acids in the form of a beige solid. Mass Spectrum: 304 (ΜΗ *). 1 H NMR: δ 8.64 (1H, broad s); 8.59 (d, 1H, J = 1.0Hz); 8.27 (d, 1H, J = 2.4Hz); 8.17 (s, 1 H); 8.15 (d, 1H, J = 2.4Hz); 7.82 (dd, 1H, J = 1.0 Hz, 7.9 Hz); 7.62 (d, 1H, J = 7.9Hz); 7.21 (s, 1 H); 3.96 (s, 3H); 2.82 (s, 3H).

(ac) In a similar manner to that described in Example 14 (a) but using 1-methyl 1-3- (5/735 pyrrolo [2,3-6] pyrazin-6-yl) -1 H -indole Of 5-carboxylic acid [Example 15 (i)] and dimethylamine, 1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole- dimethylamide was prepared. 5-carboxylic acid as a yellow solid. Mass spectrum: 320 (ΜΗ *). 1 H NMR: δ 8.26 (d, 1H, J = 2.1 Hz); 8.18 (s, 1 H); 8.15 (d, 1H, J = 2.1Hz); 7.62 (d, J = 8.1 Hz); 7.372 (dd, 1H, J = 1.0 Hz, 8.1 Hz); 6.98 (s, IH); 3.94 (s, 3H); 3.05 (s, 6H).

(ad) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole- Of 5-carboxylic acid [Example 15 (i)] and morpholine, [1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole-5] was prepared -yl] morpholin-4-yl ketone as a yellow solid. Mass Spectrum: 362 (MH +).

(ae) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole -5-carboxylic acids [Example 15 (i)] and 4-hydroxypiperidine, 4-hydroxy- [1- [1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -pyrazine] was prepared 1 H -indol-5-yl] carbonylpiperidine as a yellow solid. Mass spectrum: 376 (MH +), 398 (MNa +).

(let) In a similar manner to that described in Example 14 (a) above, but using 3- [1-methyl-1-3 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 t-Indol-5-yl] carbonylaminopropionic acid [Example 15 (1)] and methylamine, 3- [1-methyl-3- (5H-pyrrolo [2,3-6] pyrazin-6-yl) -methylamide was prepared. &gt; -37EN 301751 B6 1 / Z-Indol-5-yl] carbonylaminopropionic acid as a yellow solid Mass spectrum: 377 (MH)⁺). HPLC (Method C): Rt_T = 1.20 minutes.

(ag) In a similar manner to that described in Example 14 (a) above, but using 1-methyl-35 (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H -indole- Of 5-carboxylic acid [Example 15 (i)] and 3-hydroxypropylamine, 1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1-3-hydroxypropylamide was prepared 1-Indole-5-carboxylic acid as a yellow solid. Mass Spectrum: 350 (MH +);⁺). HPLC (Method C): Rt_T - 1.22 minutes.

io (ah) In a similar manner to that described in Example 14 (a) above, but using 3- {6- [4- (tmethyl) ethoxyphenyl-5 H -pyrrolo [2,3- b] pyrazine-7- Y-propionic acid [Example 25 (b)] and methylamine, 3- {6- [4- (1-methyl) ethoxyphenyl] - (5 H -pyrrolo [2,3- b] pyrazine-7-) methyl amide was prepared. yl} propionic acid as a yellow solid, Mass Spec .: 339 (MH +)⁺). HPLC (Method C): Rt_T = 1.49 minutes.

(ai) In a similar manner to that described in Example 14 (a) above, but using 3- [6- (4-methoxyphenyl) -577-pyrrolo [2,3-b] pyrazin-7-yl] propionic acid [Example 25 (d)] and methylamine, 3- [6- (4-methoxyphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl} -propionic acid methylamide) was prepared as an off-white solid. ^!HNMR [(CD₃)₂SO]: δ 12.0 (s, 1H), 8.3 (d, 1H), 8.2 (d, 1H), 7.7 (d, 2H), 7.1 (d, 2H), 3 Δ (s, 3H), 3.05 (t, 2H), 2.6 (t, 2H), 2.5 (s, 3H).

Mass Spectrum: 310 (MFT).

(aj) In a similar manner to that described in Example 14 (a) above, but using 3- {6- [4- (1-methyl) ethoxyphenyl] -57H-pyrrolo [2.3-6] pyrazine-7- yl} propionic acids [reference example

25 (b) as ammonium chloride, 3- {6- [4- (1-methyl) ethoxyphenyl] - (5 H -pyrrolo [2,3- b] pyrazin-7-yl} propionic acid is prepared as a white solid Mass Spectrum: 325 (MH +);⁺). HPLC (Method C): Rt_T = 1.44 minutes.

(ak) In a similar manner to that described in Example 14 (a) above, but using 3- {6- (4-hydroxyphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl} propionic acid. of acid [Example 30] and ammonium chloride, 3- {6- (4-hydroxyphenyl) -5ZH-pyrrolo [2,3-6] pyrazin-7-yl} propionamide was prepared as a white solid. Mass Spectrum: 283 (MH +);⁺). HPLC (Method C): Rt_T = 2.18 minutes.

(a1) In a similar manner to that described in Example 14 (a) above, but using 3- [6- (4-fluoro-35-phenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] -propionic acid [Example 25 (c)] and methylamine, 3- [6- (4-fluorophenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] propionic acid methylamide was prepared as an off-white solid. NMR₃)₂SO]: δ 12.5 (s, 1H), 8.4 (d, 1H), 8.2 (d, 1H), 7.8 (d, 2H), 7.4 (d, 2H), 3 1 (t, 2H); 2.6 (t, 2H); 2.5 (s, 3H). Mass spectrum: 298 (MLT).

Example 15 (a) [1-Methyl-3- {17H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indol-5-yloxy] -acetic acid

To a solution of 500 mg of {1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-, ethyl ester 5-Yloxy} acetic acid [Reference Example 15 (b)] in 25 ml methanol was added 3 ml 5M potassium hydroxide solution and the mixture was then heated under quark for 16 hours. The solvent was removed under reduced pressure and 10 ml of water was added to the residue. The pH of this mixture was adjusted to 7 by the addition of acetic acid, and the resulting colorless solid was collected by filtration and then dried to give 170 mg of the title compound as a colorless solid with a melting point&gt; 300 ° C. Mass Spectrum: 322 (MH +);⁺).

(b) In a similar manner to that described in Example 15 (a) above, but using the ethyl ester

3- {1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy) 55 propionic acid [Reference Example 15 (c)] was prepared 3- [1-methyl-3- (1H-pyrrolo [2,3-6] -38) 301751 B-pyridin-2-yl) -1 H -indole -5-yloxy} propionic acid as a colorless solid, m.p. 177-178 ° C. Mass spectrum: 336 (MH).

(c) In a similar manner to that described in Example 15 (a) above, but using the ethyl ester

1 - {1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} cyclobutanecarboxylic acids [Reference Example 15 (d)], 1- [1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole-5 was prepared. -yloxy] cyclobutanecarboxylic acid as a colorless solid, m.p. 168-169 ° C. Mass Spectrum: 362 (MH +).

(d) In a similar manner to that described in Example 15 (a) above, but using 1-l-methyl-3- [14-toluene-1-sulfonyl) -1 H -pyrrolo [2,3- b] methyl ester pyridin-2-yl] -1 H -indole-5-carboxylic acid [Reference Example 19 (a)], 1-methyl 1-3- (1 H -pyrrolo [2,3- b] pyridine- 2-yl) -1 H -indole-5-carboxylic acid as a yellow solid with a melting point&gt; 300 ° C, Mass spectrum: 291 (MH +).

(e) In a similar manner to that described in Example 15 (a) above, but using 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-ol [Reference Example 14 (a)], 1-methyl 1-3- (1 H -pyrrolo [2,3- b] pyridin-2) is prepared 1-Indol-5-ol as a yellow solid, m.p. 199-200 ° C. Mass Spectrum: 264 (MH +).

(f) In a similar manner as described in Example 15 (a) above, but using 1- {1- (ethyl-cyclobutanecarboxylate) -3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [ethyl] ester [ 2,3-d] pyridin-2-yl] -1 H -indol-5-yloxy} cyclobutanecarboxylic acid [Reference Example 23 (d)], prepare 1-} 1- (cyclobutanecarboxylic acid) -3- [1H -pyrrolo [2,3-b] pyridin-2-yl] -1 H -indol-5-yl 125 oxy} cyclobutanecarboxylic acid as a yellow solid, m.p. 240 DEG C. (decomposition). Mass spectrum: 444 (MH +).

(g) In a similar manner to that described in Example 15 (a) above, but using 1-methyl-3- [1- (toluene-1-sulfonyl) -1 H -pyrido [2,3- b] pyridine methyl ester -2-yl] -1 H -indole-6-carboxylic acid [Reference Example 13 (g)], 1-methyl 1-3- (1 H -pyrrolo [2,3- f] pyridine- 2-yl] 1 H -indole-6-carboxylic acid as a yellow solid, mp 359-361 ° C MS 292 (MH).

(h) In a similar manner to that described in Example 15 (a) above, but using the ethyl ester

3- {1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- f] pyridin-2-yl] -1 H -indol-5-yl} ' propionic acid [Reference Example 38 (a)], 3- [1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole-5- yl} propionic acid as a yellow solid, m.p. 268 DEG-270 DEG C. Mass spectrum: 320 (MH @ +).

(i) In a similar manner to that described in Example 15 (a) above but using methyl-1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1 H- of indole-5-carboxylate [Reference Example 19 (b)], 1-methyl-345H-pyrrolo [2,3-6] pyrazin-6-yl] -1H-indole-5-carboxylic acid was prepared in m.p. 350 ° C. HPLC (Method A): Rt_T = 5.85 minutes.

(j) In a similar manner to that described in Example 15 (a) above, but using [2-methoxy-5- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -phenoxy] -acetic acid ethyl ester [Example 27], [2-methoxy-5- (5H-pyrrolo [2,3-a] pyrazin-6-yl] -phenoxy] -acetic acid was prepared as a white solid, m.p. 330-332 ° C. C. Mass Spectrum: 300 (MH +).

(k) In a similar manner to that described in Example 15 (a) above, but using ethyl 3- [2-dimethylamino-5- (5 H -pyrrolo [2,3- b] pyrazin-6-yl)) phenyl] propionate [Reference Example 38 (b) J. 3- [2-dimethylamino-5- (5H-pyrrolo [2,3-b] pyrazin-6-yl) -phenyl] -propionic acid was prepared as an orange solid, m.p. 269-271 ° C. Mass Spectrum: 311 (MH +).

(1) In a similar manner to that described in Example 15 (a) above, but using 1-methyl-3- (5H-pyrido [2,3- b] pyrazin-6-yl) 2-carboethoxyethylamide 1 H -indole-5-carboxylic acid [Example 14 (y)] and sodium hydroxide, 35 mg of 3- [1-methyl-3- (5 H -pyrrolo [2,3- b]] are prepared. pyrazin-6-yl) -1 H -indol-5-yl] carbonylaminopropionic acid as an orange solid. Mass Spectrum: 364 (MH +). HPLC (Method C): Rt_T = 1.24 minutes.

Example 16 10 (a) 2- [1-Methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indol-5-yloxy] ethanol

To a solution of 120 mg of {1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-5 ethyl ester -yloxy} acetic acid [Reference Example 15 (b)] in 5 ml dry tetrahydrofuran is added at 0 ° C under a nitrogen atmosphere of 50 μΐ of a 1.0 M solution of lithium aluminum hydride in tetrahydrofuran. The mixture was allowed to warm to room temperature, stirred for 3 hours and then poured carefully into 75 ml of water. The mixture was extracted three times with 25 mL of ethyl acetate and the combined organic extracts were washed with 75 mL of saturated sodium chloride solution, then dried over sodium sulfate and then evaporated to give 45 mg of the title compound as a colorless solid, mp 209-210 ° C. Mass Spectrum: 308 (MH +);⁺).

(b) In a similar manner to that described in Example 16 (a) above, but using 3- {1-methyl-3- [1-methyl-3- [1- (toluene-4-sulfonyl) -1-ethyl ester] ethyl ester N -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} propionic acid [Reference Example 15 (c)], prepared 3- [1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indol-5-yloxy] propionic acid 1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indol-5-yloxy] propan-1-ol as a colorless solid, m.p. 164-165 ° C. Mass spectrum: 320 (MH +), (c) In a similar manner to that described in Example 16 (a) above, but using 3- {1-methyl-3- [1- (toluene-4-sulfonyl) ethyl ester. 1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} cyclobutanecarboxylic acid [Reference Example 15 (d)], prepared {1- [1] Methyl methyl 3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indol-5-yloxy] cyclobutyl} methanol as a colorless solid, m.p. 144-146 ° C. Mass Spectrum: 348 (MH +)^4-). HPLC (Method A): R t = 6.37 minutes.

(d) In a similar manner to that described in Example 16 (a) above, but using (6-phenyl-5 H 35 pyrrolo [2,3- b] pyrazin-7-yl) acetic acid [Reference Example 35], 246-phenyl-5-pyrrolo [2,3-b] pyrazin-7-yl) ethanol as a colorless solid, m.p. 201-202 ° C. Mass Spectrum: 348 (MH +). HPLC (Method A): Rt_T = 6.37 minutes, [Elemental analysis: C, 70.68; H, 5.77; N, 17.44%. Calculated for C,₃HnN₃O: C, 70.28; H, 5.48; N, 17.56%].

(e) In a similar manner to that described in Example 16 (a) above, but using [2-methoxy-5- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -phenoxy] -acetate, ethyl ester of the acid [Example 27] was prepared

2- [2-methoxy-5- (5H-pyrrolo [2,3-b] pyrazin-6-yl) -phenoxy] -ethanol as a yellow solid, m.p. 203-205 ° C. Mass Spectrum: 268 (MH +);⁺).

(f) By a similar procedure to that described in Example 16 (a) above but using ethyl 3- [2-dimethylamino-5- (5 H -pyrrolo [2,3- b] pyrazin-6-yl)) phenyl] propionate [Reference Example 38 (b)], 3- [2-dimethylamino-5- (5 H -pyrrilo [2,3- b] pyrazin-6-yl) phenyl] propan-1-ol was prepared m.p. 203-204 ° C. Mass Spectrum: 297 (MH +).

(g) In a similar manner to that described in Example 16 (a) above, but using 3- {6- [4- (1-methyl) ethoxyphenyl] -5H-pyrrolo [2,3-6] pyrazine-7 -yl} propionic acid [Example 25 (b)], 7 mg of 3- {6- [4- (1-methyl) ethoxyphenyl] -5Z-pyrrolo [2,3-6] pyrazin-7-yl are prepared Propanol as a yellow solid. Mass Spectrum: 312 (MH +);⁺). HPLC (Method C): R t = 2.9 min.

-40tz 30I75I Bo

Example 17 (a) 2- (5-Methoxy-1-methyl-17 H -indol-3-yl) -1 H -pyrrolo [2,3- b] pyridine

To a solution of 1.45 g of 2- (5-methoxy-1-methyl-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] ] pyridine [Reference Example 13 (b)] in 100 ml methanol was added 15 ml 5M potassium hydroxide solution and the mixture was heated to boiling for 2 hours. The reaction mixture was cooled and then evaporated, the residue was overlaid with 150 ml of water and the resulting solid collected by filtration and then dried to give 0.75 g of the title compound as a tan solid, m.p. 226-227 ° C. . Mass Spectrum: 278 (MH +).

(b) In a similar manner to that described in Example 17 (a) above, but using 3- {1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} propan-1,2-diol [Reference Example 16], prepare 3- [1-methyl-3- (1H-pyrrolo [2,3- 6] pyridin-2-yl) -1 H -indol-5-yloxy] propane-1,2-diol as a colorless solid, m.p. 202-203 ° C. Mass spectrum: 338 (MH).

(c) In a similar manner to that described in Example 17 (a) above, but using 3- {1-methyl-1-3 [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3] -6] pyridin-2-yl] -1 H -indol-5-yloxy} propan-1-ol [Reference Example 17], prepare 3- [1-methyl-3- (1 H -pyrrolo [2], 2-methylpyridin-2-yl) -propan-1-ol. 3- (6-pyridin-2-yl) -1 H -indol-5-yloxy] propan-1-ol as a yellow solid, m.p. 192-193 ° C. Mass spectrum: 322 (MH +).

(d) In a similar manner to that described in Example 17 (a) above, but using 3- {1-methyl-1-325 [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] Pyridin-2-yl] -1 H -indol-5-yloxy} propan-2-ol [Reference Example 17] was prepared 3- [1-methyl-3- (1H-pyrrolo [2,3- b]). 1-pyridin-2-yl) -1 H -indol-5-yloxy] propan-2-ol as a yellow solid, m.p. 201-202 ° C. Mass Spectrum: 322 (MH +).

(e) In a similar manner to that described in Example 17 (a) above, but using 2- [1-methyl-1-5 (1-trimethylstannanes) -1 H -tetrazol-5-yl) -1 H- Indol-3-yl-1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridine [Reference Example 20] was prepared 2- [1-methyl-5- {2/1]. (3-Tetrazol-5-yl) -1 H -indol-3-yl] -1 H -pyrrolo [2,3- b] pyridine as a yellow solid, m.p. 303 ° C. Mass spectrum: 316 (MH +).

(f) In a similar manner to that described in Example 17 (a) above, but using 2- [1-methyl-1-5 (2-methyl-2H-tetrazol-5-yl) -1 H -indole -3-yl] -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 21] was prepared 2- [1-methyl-5- (2-methyl-2 H)] (1-Tetrazol-5-yl) -1 H -indol-3-yl] -1 H -pyrrolo [2,3- b] pyridine as a beige solid, m.p. 299-300 ° C (dec.). Mass Spectrum: 330 (MH +).

(g) In a similar manner to that described in Example 17 (a) above, but using 2- [1-methyl-1-5 (1-methyl-17 H -tetrazol-5-yl) -1 H -indole- 3-yl] -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 21] was prepared 2- [1-methyl-5- {1-methyl-1-1] H-tetrazol-5-yl-1H-indole-

3-yl] -1 H -pyrrolo [2,3- b] pyridine as a beige solid, m.p. 286-289 ° C (dec.). Mass Spectrum: 330 (MH +).

(h) In a similar manner to that described in Example 17 (a) above, but using 1- [1-methyl-3 - {(1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3-] d] pyridin-2-yl} -1_JN-indol-5-yl] ethanone [Reference Example 22], 1- [1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1H-indole- 5-yl] ethanone as a beige solid, m.p. 210 ° C (dec.). Mass spectrum: 290 (MH +).

(i) In a similar manner to that described in Example 17 (a) above, but using

2- (5,6-dimethoxy-1-methyl-1H-indol-3-yl) -1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridine

[Reference Example 13 (d)], 2- (5,6-dimethoxy-1-methyl-1 H -indol-3-yl) -1 H -pyrrolo [2,3- b] pyridine is prepared in m.p. m.p. 283-285 ° C (dec.). Mass spectrum; 308 (MH).

(j) In a similar manner to that described in Example 17 (a) above, but using (S) -3- {1-methyl-3- [1- (toluene-4-sulfonyl} -1 H -pyrrolo [ 2,3-ópyridin-2-yl] -1 H -indol-5-yloxy} propane-1,2-diol [Reference Example 24 (a)], (S) -3- [1-methyl] is prepared. -3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indol-5-yloxy] propane-1,2-diol as a colorless solid, m.p. 182-185 ° C Mass Spectrum: 338 (MH +)⁺(k) In a similar manner to that described in Example 17 (a) above, but using (R) -3- {1-methyl-3- [1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-a] pyridin-2-yl] -1H-indol-5-yloxy} propane-1,2-diol [Reference Example 24 (b)], prepared by (R) -3- [1-methyl] -3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indol-5-yloxy] propane-1,2-diol as a colorless solid, m.p. 153-156 ° C. Mass Spectrum: 338 (MH +);⁺).

(1) In a similar manner to that described in Example 17 (a) above, but using 2- [5- (2-methoxy-1-methylethoxy) -1-methyl-1 H -indol-3-y 1] -1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridine [Reference Example 25], 2- [5- (2-methoxy-1-methylethoxy) 20 1-methyl-1] was prepared. 1 H -indol-3-yl] -1 H -pyrrolo [2,3- b] pyridine as a yellow solid, m.p.

150 to 151 ° C. Mass Spectrum: 336 (MH +)⁺).

(m) In a similar manner to that described in Example 17 (a) above, but using 2- [1-methyl-5- (5-methyl- [1,2,4] oxadiazo-1-3-yl) - 1 H -indol-3-yl] -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- a] 25 pyridine [Reference Example 27], prepare 2- [1-methyl -5- (5-methyl- [1,2,4] oxadiazol-3-yl) -1 H -indol-3-yl] -1 H -pyrrolo [2,3- b] pyridine as a cream-colored solid mp 290-294 ° C. Mass Spectrum: 330 (MH +);⁺).

(n) In a similar manner to that described in Example 17 (a) above, but using (S) -3- {630 methoxy-1-methyl-3- [1- (toluene-4-sulfonyl) -1 H] - pyrrolo [2,3-b] pyridin-2-yl] -1 H -indol-5-yloxy} propane-1,2-diol [Reference Example 24 (c)], prepare (S) -3- [6-methoxy-1-methyl-3 (1H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indol-5-yloxy] propane-1,2-diol as a cream colored solids. Mass Spectrum: 368 (MH +);⁺). HPLC (Method A): Rt_T 5.81 minutes.

(o) In a similar manner to that described in Example 17 (a) above, but using 2- (5-hydroxy-6-methoxy-1-methyl-1 H -indol-3-yl) -1- (toluene-4) —Sulfonyl} -1H-pyrrolo [2,3-a] pyridine [Reference Example 28], 6-methoxy-1-methyl-3- (1H-pyrrolo [2,3-a] pyridine) was prepared -2-yl) -1 H -indol-5-ol as a brown solid Mass spectrum: 294 (MH +)^«). HPLC (Method A): Rt_T 6.37 minutes.

(p) In a similar manner to that described in Example 17 (a) above, but using 2- (5-methoxy-1-methyl-1H-indol-3-yl) -4-phenyl-1- (toluene-4-) sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 2 (m)], 2- (5-methoxy-1-methyl-1 H -indol-3-yl} - 4-Phenyl-1H-pyrrolo [2,3-a] pyridine as a yellow solid.₃)₂SO]; δ 11.98 (1H, s); 8.21 (1 H, d,

J = 3.5 Hz); 7.94 (1 H, s); 7.86 (2H, d, J = 8.8Hz); 7.59 (2H, t, J = 8.8Hz); 7.47 (2 H, m); 7.39 (1H, d, J = 1.9 Hz); 7.17 (1H, d, J = 3.5Hz); 6.93 (1H, dd, J = 8.8, 1.9 Hz); 6.82 (1H, s); 3.84 (3 H, s); 3.82 (3 H, s).

(q) In a similar manner to that described in Example 17 (a), but using 2- [5- (pyridin-4-yl) 50 1-methyl-1 H -indol-3-yl] -1- ( toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine (Reference Example 60), prepare 2- [1-methyl-5- (pyridin-4-yl) -1 H -indole-3 4-1H-pyrrolo [2,3-b] pyridine as a yellow solid, m.p. 325 DEG-330 DEG. ^l@ 1 H NMR₃)₂SO]; δ 8.65 (2H, d, J = 7.2Hz); 8.20 (1H, s); 8.15 (1 H, m); 8.04 (1H, s); 7.88 (3 H, m); 7.72 (2 H, m); 7.03 (1H, t, J = 7.2Hz); 6.96 (1 H, s); 3.93 (3 H, s).

(R) In a similar manner to that described in Example 17 (a), but using 2- (5-methoxy-1-methyl-1H-indol-3-yl) -toluene-4-sulfonyl) - 1 H -pyrrolo [2,3- b] pyridine-4-carbomtril [Reference Example 13 (h)], 2- (5-methoxy-1-methyl-1 H -indol-3-yl) is prepared. 1 H -pyrrolo [2,3- b] pyridine-4-carbonitrile as an orange solid, m.p. 304-305 ° C.

1 HNMR [(CD₃)₂SO]; δ 12.60 (1H, s); 8.24 (1H, s); 8.07 (1 H, s); 7.50 (3 H, m); 6.96 (1H, d, J = 8.6 Hz); 6.88 (1 H, s); 3.91 (3 H, s); 3.86 (3 H, s).

(s) In a similar manner to that described in Example 17 (a), but using 4-chloro-2- (5-methoxy-1-methyl-1 H -indol-3-yl) -1- (toluene) -&gt; Sulfonyl-1 H -pyrrolo [2,3- a] pyridine [Reference Example 13 (i)], 4-chloro-2- (5-methoxy-1-methyl-1 H) was prepared; Indole-3-yl-1H-pyrrolo [2,3-a] pyridine as a tan solid, m.p. 250 DEG-252 DEG C. Mass spectrum: 312 (MH @ +)⁺).

Example 18

-Methyl 1-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indol-5-ylamine

To a stirred solution of 0.2 g of [1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -20 H -indol-5-yl] tert -butyl ester carbamic acid [Reference Example 30] in dichloromethane was added 2 mL of trifluoroacetic acid (2 mL). The mixture was stirred at room temperature for 16 hours and then evaporated.

The residue is suspended in 10 mL of saturated sodium bicarbonate solution and the resulting solid is filtered and then dried to give the title compound as a yellow solid, m.p. 247-248. ^EC. Mass Spectrum: 263 (MH +)⁴).

Example 19 (a) N- [1-Methyl-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) -1H-indol-5-yl] methanesulfonamide

A solution of 52.4 mg of 1-methyl-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indol-5-ylamine [Example 18] in 5 ml of dichloromethane is treated with 30 μΐ of triethylamine and then with 17 μΐ of methanesulfonyl · chloride. After stirring at room temperature for 16 hours, the reaction mixture was diluted with 10 mL of dichloromethane, then washed with 10 mL of water, then with 10 mL of brine, dried over magnesium sulfate and evaporated. The solid obtained was triturated with diethyl ether to give the title compound as a yellow solid, mp 223-224 ° C. MS: 341 (MH +)⁴).

(b) In a similar manner to that described in Example 19 (a) above but using acetyl chloride, N- [1-methyl-3- (1H-pyrrolo [2,3-a] pyridine-2) was prepared. -yl) -1 H -indol-5-yl] acetamide as a yellow solid, m.p. 220-221 ° C. MS: 305 (MH +)⁴).

Example 20 (a) {1- [5- (1-Hydroxymethylcyclobutoxy) -3- {1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-1-yl] cyclobutyl} methanol

Stir solution of 0.54 g of 1- {1- (ethylcyclobutanecarboxylate) -3- [1- (toluene-4sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -ethyl ester. -indol-5-yloxy} cyclobutanecarboxylic acid [Reference Example 23 (d)] in 50 ml tetrahydrofuran is treated dropwise with 4.9 ml of a 1.0 M solution of lithium aluminum hydride in tetrahydrofuran at 0 ° C under nitrogen. After stirring at 0 ° C for 2 hours, the reaction mixture was allowed to stand for 18 hours at room temperature, then 20 ml of water was added dropwise and the mixture was filtered through Hyflo Super Cel®. The filter bed is washed with 20 ml of ethyl acetate, the biphasic filtrate is separated and the aqueous layer is extracted twice with 25 ml of ethyl acetate.

The combined organic phases were washed with 25 ml of brine, then dried over magnesium sulfate

B43 and evaporated. The residue was triturated with diethyl ether and the insoluble material was purified by flash chromatography on silica gel eluting with dichloromethane: methanol (19: 1, v / v) to give 0.19 g of the title compound as a cream solid, m.p. 165-166. Deň: 32 ° C. MS: 418 (MH +)⁺).

(b) In a similar manner to that described in Example 20 (a), but using {1- [1-methyl-3- {5H-pynolo [2,3- b] pyrazin-6-yl) -, ethyl ester - 1 H -indol-5-yloxy] cyclobutylcarboxylic acid (Reference Example 15 (e)) was prepared {1- [1-methyl-3- (5 H -pyrrolo [2,3- b]] pyrazin-6-yl) 1 H -indol-5-yloxy] cyclobutyl} methanol as a brown solid, mp 267-271 ° C. MS: 349 (MH +)⁺).

Example 21 (a) 2- (5-Methoxy-1-methyl-1H-indol-3-yl) -1 H -pyrrolo [2,3- b] pyridine methanesulfonate μΐ Methanesulfonic acid is added to the solution at room temperature 300 mg of 2- {5-methoxy-1-methyl-1H-indol-3-yl-1H-pyrrolo [2,3-Z]] pyridine [Example 17 (a)] in 20 ml of tetrahydrofuran. The mixture was stirred for 45 minutes and the resulting precipitate was filtered off to give 390 mg of the title compound as a yellow solid, mp 256-257 ° C. [Elemental analysis: C, 57.60; H, 4.77; N, 10.90%. Calcd_bHj, N₃O: C, 57.90; H, 5.13; N, 11.25%].

(b) Using a similar procedure to that described in Example 21 (a) above, but using 6- (5-methoxy-1-methyl-1H-indol-3-yl} -5H-pyrrolo [2]). 3-Z] pyrazine [Example 1 (a)] was prepared

6- (5-methoxy-1-methyl-1H-indol-3-yl) -5H-pyrrolo [2,3-d] pyrazine methanesulfonate as a yellow solid, m.p. 245-250 ° C. MS: 279 (MH +)⁺).

(c) Using a similar procedure to that described in Example 21 (a) above, but using

2- [5-methoxy-3- (1H-pyrrolo [2,3-b] pyridin-2-yl) indol-1-yl] -1-morpholin-4-ylethanone [Example 14 (a) ], 2- [5-methoxy-3- (1 H -pyrrolo [2,3- b] pyridin-2-yl) indol-1-yl] -1-morpholin-4-yl-ethanone methanesulfonate was prepared as a yellow, solid mp 214-215 ° C. MS: 391 (MH +).

(d) Using a similar procedure to that described in Example 21 (a) above, but using 1-methyl-3- (1H-pyrrolo [2-hydroxy-1,1-di-methyl] -amide) amide. 3-d] pyridin-2-yl) -1 H -indole-5-carboxylic acid [Example 14 (m)], 2-hydroxy-1,1-dimethylethyl) amide methanesulfonate 1-methyl 1-3- ( 1 H -pyrrolo [2,3- b] pyridin-2-yl) -1 H -indole-5-carboxylic acid as a yellow solid, m.p. 190-192 ° C. MS: 363 (MH +);⁺).

(e) In a similar manner to that described in Example 21 (a) above, but using 1-methyl-3- (5H-pyaolo [2,3-a] pyrazine (2-hydroxy-1,1-dimethylethyl) amide) -6-yl) -1 H -indole-5-carboxylic acid [Example 14 (s)], 2- [5-hydroxy-1,1-dimethylethylcarbamoyl) -1-methyl-1 H -indole-3 was prepared. -yl] -1 H -pyrrolo [2,3- f] pyrazine methanesulfonate as a brown solid, m.p. 240 ° C (dec.). @ 1 H NMR .delta₃)₂SO]: δ 8.50 (1H, s); 8.37 (1H, d, J = 3.0Hz); 8.32 (1 H, d,

J = 3.0 Hz); 8.29 (1 H, s); 7.82 (1H, d, J = 8.2Hz); 7.77 (1 H, s); 7.64 (1H, d, J = 8.2Hz); 7.20 (1 H, s); 3.95 (3 H, s); 3.59 (2H, s); 2.37 (3H, s); 1.38 (6 H, s).

(f) In a similar manner to that described in Example 21 (a) above, but using 2- [5-methoxy-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) indol-1] -yl] -1-morpholin-4-yl-ethanone (Example 12), 2- [5-methoxy-3- (5H-pyrrolo [2,3-b] pyrazin-6-yl) -indol-1] was prepared. 1-morpholin-4-yl-ethanone methanesulfonate, m.p. 1 H NMR [(CDCl 3) 3: δ 8.32 (1H, s); 8.22 (1H, s); 8.11 (1H, s); 7.50 (1H, s); 7.44 ( 1H, d, J = 8.8 Hz); 7.04 (1H, s); 6.93 (1H, d, J = 8.8 Hz); 5.36 (2H, s); 3.90 ( 3.61 (8H, m), 2.31 (3H, s).

-44GB 30i75i Bo

Example 22

5464&gt; tert-Butylphenyl-5H-pyrrolo [2,3-b] pyrazin-7-yl] ethyl “2H-tetrazole

To a stirred solution of 0.2 g of 3- [644-tert-butylphenyl-5 H -pyrido [2,3- b] pyrazin-7-yl] propionitrile [Example 23] in 25 ml of toluene was added under nitrogen at a temperature of of azidotributyltin. The reaction mixture was heated to 117 ° C. After 24 hours, an additional aliquot of 0.21 mL of azidotributyltin was added and the reaction was heated for an additional 24 hours. The reaction was quenched by the addition of glacial acetic acid (44 ml) and stirred for 15 minutes and partitioned between water and ethyl acetate. The two layers were separated, the organic phase was washed with water, dried over magnesium sulphate and evaporated. The residue was purified by silica gel column chromatography eluting with ethyl acetate to give 0.06 g of the title compound as an off-white solid.

MS: 348 (MH +). HPLC (Method B): Rt_T = 1.64 minutes.

Example 23

3- [644- tert -Butylphenyl-5H-pyrrolo [2,3-b] pyrazin-7-yl] -2H-propionitrile

To a solution of 0.1 g of 3- [6- (4- tert -butylphenyl-577-pyrrolo [2,3-6] pyrazin-7-yl] propionamide [Example 24] in 15 ml of tetrahydrofuran at room temperature triethylamine (1 ml) and phosphorus pentoxide (1 ml) were added and the reaction mixture was heated under reflux for 30 minutes, then poured into 10% sodium bicarbonate solution. The mixture was extracted with ethyl acetate and the combined organic extracts washed with water, dried over magnesium sulfate and dried. evaporate. The residue was purified by flash chromatography on silica gel eluting first with ethyl acetate / pentane (1: 1, v / v) then ethyl acetate to give the title compound as a white solid, mp 215-216 ° C, MS: 305 (MH +).

Example 24

3- [6- (4-tert-Butylphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl] propionamide

To a solution of 0.51 g of 3- [6- (4-tert-butylphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl] propionic acid 35 [Example 25 (a)] in 15 ml of dimethylformamide was added in nitrogen atmosphere at room temperature

0.54 g of O-benzotriazol-1-yl-N, N, N ', N'-tetramethyluronium tetrafluoroborate and 0.22 ml of triethylamine. Ammonia gas was bubbled through the solution for 5 minutes and the reaction mixture was allowed to stand at room temperature overnight. The solution was then poured into water and extracted with ethyl acetate. The organic extracts were washed with water and dried over sodium sulfate to give the title compound which was used without further purification. MS: 323 (MH &amp; lt; + &amp; gt;). HPLC (Method B): R t = 4.49 min.

Example 25 (a) 3- [644-tert-Butylphenyl-5H-pyrrolo [2,3-b] pyrazin-7-yl] propionic acid

To a solution of 0.4 g of dimethyl 3- [644-tert-butylphenyl-5H-pyrrolo [2,3-b] pyrazin-7-yl] propionic 1,1-dicarboxylate [Reference Example 44 (a)] in 20 ml of methanol are added with 4 ml of 1N sodium hydroxide solution. The reaction mixture was heated at 50 ° C for 6 hours then allowed to stand at room temperature overnight. The solvent was evaporated, 50 ml of 6N sulfuric acid solution was added and the reaction mixture was refluxed for 2 hours. After cooling, the solution was basified to pH 4 with 6N sodium hydroxide solution and the resulting precipitate was filtered off and dried in vacuo to give 0.26 g of the title compound as an off-white solid which was used without further purification, m.p. Mp 274-275 ° C. MS: 324 (MH &amp; lt; + &amp; gt;).

(B) Using a similar procedure to that described in Example 25 (a), but using dimethyl-3- [6- (4- (1-methyl) ethoxyphenyl) -5H-pyrrolo [2, b] 3- (6-pyrazin-7-yl) -propion-1,1-dicarboxylate [Reference Example 44 (b)], prepared 3- [6- [t-1-methyl) ethoxyphenyl] -5 H -pyrrolo [2] 3-β-pyrazin-7-yl] propionic acid as a yellow solid. MS: 326 (MH +)⁺). HPLC (method

C): R t = 1.56 minutes.

(c) Using a similar procedure to that described in Example 25 (a) but using dimethyl-3- [6- (4-fluorophenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] Propion-1,1-dicarboxylate [Reference Example 44 (c)], 3- [6- (4-fluorophenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] propionic acid was prepared it is acidified to an off-white solid. 1 HNMR [(CD,)₂SO]: δ 12.3 (s, 1H), 8.4 (d, IH), 8.2 (d, IH), 7.8 (d, 2H), 7.4 (d, 2H), 3 1 (t, 2H); 2.7 (t, 2H). MS: 285 (MH +).

(d) Using a similar procedure to that described in Example 25 (a) but using dimethyl-3 [6- (4-methoxyphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] propion-1,1-dicarboxylate [Reference Example 44 (d)], 3- [6- (4-methoxyphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] propionic acid was prepared in in the form of an off-white, solid. ^lHNMR [(CD₃)₂SO]: δ 12.0 (s, 1H), 8.3 (d, 1H), 8.2 (d, 1H), 7.7 (d, 2H), 7.1 (d, 2H), 3 Δ (s, 3H), 3.05 (t, 2H), 2.6 (t, 2H). MS: 297 (MH +).

Example 26

3- [6- (4- tert -Butyl-phenyl) -5H-pyrrolo [2,3-b] pyrazin-7-yl] propan-1-ol

To a mixture of 5 ml of 4N hydrochloric acid in dioxane (1: 1, v / v) was added 0.02 g of 25 3- [6- (4-tert-butylphenyl-5 H -pyrrolo [2,3- b] pyrazine-7-). After the evaporation, the residue is suspended between 10% sodium bicarbonate solution and ethyl acetate, the phases are separated and the organic phase is washed with water and dried over sodium sulphate. in 50 ml of ether, 0.12 ml is added

A 1M solution of lithium aluminum hydride in diethyl ether and the suspension was heated at reflux for 2 hours. An additional aliquot of 0.12 mL of a 1M solution of lithium aluminum hydride in diethyl ether was added and the reaction mixture was heated under reflux for an additional 1 hour.

The reaction was quenched by the dropwise addition of cold aqueous 10% potassium bicarbonate solution until hydrogen evolution ceased, diluted with water and extracted with ether. The combined organic fractions were washed with water, dried over sodium sulfate and purified by flash chromatography on silica gel eluting with ethyl acetate to give 0.035 g of the title compound as an off-white solid, mp 187-189 ° C. MS: 310 (MH &amp; lt; + &amp; gt;).

Example 27

[2-Methoxy-5- (5H-pyrrolo [2,3-b] pyrazin-6-yl) -phenoxy] -acetic acid ethyl ester

To a solution of 0.5 g of 2-methoxy-5- (5H-pyrrolo [2,3-b] pyrazin-6-yl) phenol [Example 28] in 10 ml of dimethylformamide and 0.67 g of cesium carbonate was added 0.025 g. ethyl chloroacetate. The reaction mixture was heated at 50 ° C overnight. After cooling, dimethylformamide was evaporated in vacuo and the residue was partitioned between ethyl acetate and water. The organic fraction was dried over sodium sulfate, evaporated, and purified by flash chromatography on silica gel eluting with 2.5% methanol in dichloromethane. The product was further triturated with ethyl acetate-pentane to give the title compound as a white solid, mp 183-184 ° C. MS: 238 (MH +),

Example 28

2-Methoxy-5- (5H-pyrrolo [2,3-b] pyrazin-6-yl) phenol

-46LZ 30175I Βό

To a solution of 1.0 g of 6- (3-tert-butyldimethylsilyloxy-4-methoxy) phenyl-5 H -pyrido [2,3- b] pyrazine [Reference Example 49] in 50 mL of tetrahydrofuran was added 5.63 mL of 1M solution of tetrabutylammonium fluoride in tetrahydrofuran. The reaction mixture was stirred at room temperature for 3 hours. The tetrahydrofuran was evaporated under reduced pressure and the residue was suspended in water. The resulting solid was filtered and dried under vacuum to give 0.56 g of the title compound as a white solid which was used without further purification. MS: 242 (MH &amp; lt; + &amp; gt;). HPLC (Method B): Rt_T = 3.02 minutes.

Example 29

3-Fluoro-2- (5-methoxy-1-methyl-1H-indol-3-yl) -1 H -pyrrolo [2,3- b] pyridine

A solution of 0.1 g of 2- (5-methoxy-1-methyl-1H-indol-3-yl) -1H-pyrrolo [2,3-6] pyridine [Example 17 (a)] in 4 ml of dry tetrahydrofuran is treated with 0.042 ml of methylmagnesium bromide at 0 ° C and after stirring for 20 minutes, this mixture is treated with 0.13 g of 1-chloromethyl-fluoro-1,4-diazoniabicyclo [2.2.2] octanebis (tetrafluoroborate). The reaction mixture was stirred at room temperature for 4 hours, then allowed to stand overnight at room temperature, then heated at 40 ° C for 4 hours, then at 80 ° C for 2 hours, cooled to room temperature and partitioned between ethyl acetate and water. . The aqueous layer was extracted three times with 25 mL of ethyl acetate. The combined extracts and ethyl acetate layer were washed with brine, dried over magnesium sulfate and then evaporated. The residue was triturated with ethyl acetate to give 0.057 g of the title compound as a white solid, mp 248-250 ° C. ^]@ 1 H NMR₃)₂SO]: δ 12.20 (1H, s); 8.24 (1 H, m); 7.81 (1 H, s); 7.79 (1H, d, J = 9.6Hz); 7.45 (1H, d, J = 9.6Hz); 7.27 (1 H, s); 7.18 (1H, dd, J = 13.1, 6.0 Hz);

6.90 (1H, d, J = 9.6Hz); 3.88 (3 H, s); 3.80 (3 H, s).

Example 30

3- {6- (4-Hydroxy-phenyl) -577-pyrrolo [2,3-b] pyrazin-7-yl} -propionic acid

To a solution of 0.77 g of dimethyl 3- [6- (4- (1-methyl) ethoxyphenyl) -57 H -pyrrolo [2,3- f] pyrazin-7-yl] propion-1,1-licarboxylate [Reference Example 44 (b)] in 45 ml of methanol was added 7.7 ml of 1N sodium hydroxide solution. The reaction mixture was heated at 50 ° C for 6 hours then allowed to stand overnight at room temperature. The solvent was evaporated, 20 ml of 6N sulfuric acid solution was added and the reaction mixture was heated under reflux for 12 hours. After cooling, the solution was basified to pH 4 by addition of 4N sodium hydroxide solution and the resulting precipitate was filtered off and dried in vacuo to give 0.42 g of the title compound as a yellow solid which was used without further purification. MS: 284 (MH &amp; lt; + &amp; gt;). HPLC (Method C): Rt_T = 2.3 minutes.

Example 31

Ethyl 3- {6- (4-hydroxyphenyl) -5 H -pyrido [2,3- b] pyrazin-7-yl} propionate

A solution of 0.02 g of 3- {6- (4-hydroxyphenyl) -5H-pyrrolo [2,3-b] pyrazin-7-yl} propionic acid [Example 30] in 2 ml of ethanol is treated with with a catalytic amount of para-toluenesulfonic acid. The mixture was heated under reflux for 4 hours, the solvent was evaporated and the precipitate was filtered off. The solid was taken up in ethyl acetate, the organic layer was washed with water, brine, dried over magnesium sulfate and evaporated to give a yellow solid which was purified by flash chromatography on silica gel eluting with ethyl acetate to give the title compound. MS: 298 (MH +), HPLC (method C): R t_T = 2.58 minutes.

-47GB 301751 B6

Example 32 and Reference Example 100

2- (5-Methoxy-1H-indol-3-yl) -1H-pyrrolo [2,3-d] pyridine-4-carbonitrile

Following a similar procedure to that described in Reference Example 12 (a), but using 2-iodo-1- (toluene-4-sulfonyl) -1,77-pyrrolo [2,3-a] pyridin-4-one. —Carbonite [Reference Example 62 (a)], the title compound is prepared as a yellow solid, m.p. 303 DEG-304 DEG C., TLC R,_F = 0.07 (ethyl acetate / heptane 1: 1) and 2- (5-methoxy-1H-indol-3-yl) -1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-a] ] pyridine-4-carbonitrile [Reference Example 100] as a brown oil.

MS: 443 (MH +);⁺). TLC: Rf_F = 0.38 (ethyl acetate / heptane 1: 1).

Example 33

6- (4-Methylsulfinylphenyl) -5 H -pyrrolo [2,3- b] pyrazine

A stirred suspension of 0.2362 g of 6- (4-methylthiophenyl) -5 H -pyrrolo [2,3- b] pyrazine [Example 1 (ah)] in 20 mL of dichloromethane is treated with 2.545 g of TBA oxone, where TBA is tetrabutylammonium. After 2 hours, the resulting orange solution was evaporated. The residue was purified by flash chromatography eluting with methanol / dichloromethane (1: 1, v / v) to give the title compound as a white solid. MS: 258 (MH +).^]@ 1 H NMR₃)₂SO]: δ 12.66 (1H, s); 8.41 (1H, s); 8.24 (3 H, m); 7.82 (2H, d, J = 8.7Hz); 7.33 (1H, s); 2.81 (3 H, s).

Example 34

6- (4-Methylsulfonylphenyl) -5H-pyrrolo [2,3-b] pyrazine

Stirring suspension 0.125 g of 6- (4-methylthiophenyl) -57H-pyrene^,olo [2,3-b] pyrazine [Example 1 (ah)] in 15 mL of dichloromethane was treated with 1.35 g of TBA oxone. After 4 hours, the reaction mixture was evaporated. The residue was purified by flash chromatography eluting with methanol / dichloromethane (1: 1, v / v) to give the title compound as a white solid. MS: 274 (m / z)⁴). @ 1 H NMR .delta₃)₃SO]: δ 12.78 (1H, s); 8.44 (1H, s); 8.28 (3 H, m); 8.04 (2H, d, J = 8.8Hz); 7.40 (1H, s); 3.27 (3 H, s).

Example 35

3- (6- (4-tert-Butylphenyl) -5H-pyrrolo [2,3-b] pyrazin-7-yl) propylamine

A solution of 0.2 g of 3- [6- (4- (1-butyl-phenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) -propionamide [Example 24] in 20 ml of dry tetrahydrofuran is reacted. 5 ml of a 1M solution of lithium aluminum hydride in diethyl ether The solution was stirred at room temperature for 24 hours and then treated with 20 ml of water, filtered through diatomaceous earth and the diatomaceous earth was washed twice with 20 ml of ether.

The combined filtrates were washed with water then brine, dried over magnesium sulfate and evaporated to give 0.12 g of the title compound as a yellow solid. MS: 309 (MH +)⁴). HPLC (Method C): Rt_T = 2.54 minutes.

Example 36 (a) N- (34M4-tert-Butylphenyl) -5H-pyrrolo [2,3-b] pyrazin-7-yl) propyl} acetamide

A solution of 0.0324 mmol of 3- (6- (4- / e?)?^,C^, - Butylphenyl-57 H -pyrrolo [2,3- b] pyrazin-7-yl] propylamine [Example 35] in 1.5 ml of tetrahydrofuran is treated with 0.0324 mmol of acetyl chloride and 0.0788 mmol

-48EN 301751 Bo triethylamine. The solution was stirred at room temperature for 12 hours and then treated with water and ethyl acetate. The organic phase is dried over magnesium sulphate and then evaporated. The residue was purified by column chromatography on silica gel eluting with ethyl acetate and then with a mixture of ethyl acetate and methanol (9: 1, v / v) to give the title compound as a yellow solid. MS: 351 (MH &amp; lt; + &amp; gt;). HPLC (Method C): Rt_T = 3.05 minutes.

(b) Using a similar procedure to that described in Example 3 (a) above but using cyclopropylcarbonyl chloride, N- (34644-tert-butylphenyl) -5 H -pyrrolo [2,3- a] pyrazine- amide was prepared. 7-yl) propyl} cyclopropyl carboxylic acid as a yellow, gummy solid.

MS: 377 (MH +). HPLC (Method C): Rt_T = 3.25 minutes.

(c) Using a similar procedure to that described in Example 36 (a) above, but using n-butyroyl chloride, N- {3- (6 - (tert-butylphenyl) -5 H -pyrrolo [b, 3-a] pyrazin-7-yl) propyl] butyramide as a yellow, gummy solid. MS: 379 (MH +). HPLC (Method C): R t = 3.28 minutes.

(d) Using a similar procedure to that described in Example 36 (a) above, but using methoxyacetyl chloride, N- {3- (6- (4-tert-butylphenyl) -5 H -pyrrolo [2,3- d] - 3-Z] pyrazin-7-yl) propyl} methoxyacetamide as a yellow solid. MS: 381 (MH +). HPLC (method C):

R_T = 3.15 minutes.

(e) Using a similar procedure to that described in Example 36 (a) above but using thien-2-ylcarbonyl chloride, N- {3- (6- (4-tert-butylphenyl) -5 H -pyrrolo) amide was prepared. [2,3-Z] pyrazin-7-yl) propyl} thien-2-ylcarboxylic acid as a yellow solid. MS: 419 (MH +).

HPLC (Method C): Rt_T = 3.28 minutes.

Example 37 (a) N- {3- (644-tert-Butylphenyl) -57 H -pyrrolo [2,3- b] pyrazin-7-yl) propyl} -N'-n-propylurea

A solution of 0.0324 mmol of 34644- (tert-butylphenyl) -5,7-pyrrolo [2,3-Z] pyrazin-7-yl) propylamine [Example 24) in 2 ml of tetrahydrofuran is treated with 0.0324 mmol of n- propylisocyanate. The solution was stirred at room temperature for 12 hours and then treated with 3 mL of water. The resulting precipitate was filtered, then washed with water and dried under vacuum at 50 ° C to give the title compound as a beige solid. MS: 394 (MH +). HPLC (Method C): Rt_T = 3.25 minutes.

(b) Using a similar procedure to that described in Example 37 (a) above, but using ethyl 40 isocyanatoacetate, N43464 was prepared.^ofto tert-butylphenyl) -5H-pyrrolo [2,3-b] pyrazin-7-yl) propyl} -N'-carboethoxymethylurea as a yellow solid. MS: 437 (MH +). HPLC (Method C): R t = 3.18 minutes.

Example 38

N- (34644-tert-Butylphenyl) -5H-pyrrolo [2,3-b] pyrazin-7-yl) propyl} -N ', N'-diethylurea

A solution of 0.0324 mmol of 34644- (tert-butylphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl) propylamine 50 [Example 24) in 1.5 mL of tetrahydrofuran is treated with 0 , 0324 mmol of diethylcarbamoyl chloride and 0.0788 mmol of triethylamine. The solution was stirred at room temperature for 12 hours and water and ethyl acetate were added. The layers were separated and the organic solution was dried over magnesium sulfate. The desiccant was filtered off and the solvent was evaporated. The residue was purified by silica gel column chromatography eluting with ethyl acetate and then 10% methanol in ethyl acetate to give the title compound as a yellow solid. MS: 408 (MH +), HPLC (method C): R t = 3.43 minutes.

-49GB 301751 B6

Example 39 (a) N- {3- {6- (4- tert -Butylphenyl) -5 H -pyrido [2,3- b] pyrazin-7-yl) propyl} methanesulfonamide

A solution of 0.0324 mmol of 3- (b- (4- tert -butylphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl) propylaquinine [Example 24] in 1.5 mL of tetrahydrofuran is treated with 0 , 0324 mmol of methanesulfonyl chloride and 0.0788 mmol of triethylamine. The solution was stirred at room temperature for 12 hours and ethyl acetate was added. The layers were separated and the solvent was evaporated. The residue was purified by silica gel column chromatography eluting with ethyl acetate and then 10% methanol in ethyl acetate to give the title compound as a yellow solid. MS: 387 (MH +). HPLC (Method C): Rt_T = 3.23 minutes.

(b) Using a similar procedure to that described in Example 39 (a) above, but using thien-215 ylsulfonyl chloride, N- {3- (6- (4-tert-butylphenyl) -5 H -pyrrolo [b] f) was prepared. 2,3-6] pyrazin-7-yl) propyl} thien-2-ylsulfonamide as a yellow solid. MS: 455 (MH +). HPLC (Method C): Rt_T = 3.56 minutes.

(c) Using a similar procedure to that described in Example 39 (a) above, but using

3,5-dimethylisoxazol-4-ylsulfonyl chloride, N- {3- (6- (4-tert-butylphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl) propyl} dimethylisoxazol-4-ylsulfonamide was prepared in the form of gummy, white, solids. MS: 468 (MH &amp; lt; + &amp; gt;). HPLC (Method C): Rt_T - 3.55 minutes.

(d) Using a similar procedure to that described in Example 39 (a) above but using 1-methyl 125 imidazol-4-ylsulfonyl chloride, N- {3- (6- (4- tert -butylphenyl) - 5/7-Pynolo [2,3-b] pyrazin-7-yl) propyl} -1-methylimidazol-4-ylsulfonamide as a gummy, white solid. MS: 453 (MH +), HPLC (method C): R t_T = 3.13 minutes.

Reference Example 1 (a) 5-Methoxy-1-methyl-1 H -indole-3-carbonitrile g 5-Methoxy-1-methyl-1 H -indole-3-carbaldehyde [Reference Example 2 (a)] and 55.9 g of hydroxylamine hydrochloride are stirred together with 900 ml of dimethylformamide under reflux for 1 hour. The mixture was allowed to cool, then poured into water and extracted with ethyl acetate. The combined extracts were washed with water then evaporated to give 53 g of the title compound as a light brown solid, mp 100-104 ° C. @ 1 H NMR .delta₃)₂SO3: δ 8.17 (1H, s); 7.54 (1H, d, J = 9.0Hz); 7.09 (1H, d, J = 2.4Hz); 6.97 (1H, dd, 40 J = 9.0 and 2.4 Hz); 3.82 and 3.84 (6H, s).

(b) In a similar manner to that described in Reference Example 1 (a) above, but using

1-Methyl-5-phenyl-pyrazole-3-carbaldehyde [Reference Example 53 (b)] was prepared by 1-methyl-1-3-yl-5-phenyl-pyrazole.

Reference Example 2 (a) 5-Methoxy-1-methyl-1 H -indole-3-carbaldehyde

A solution of 80 g of 5-methoxyindole-3-carboxaldehyde in 1 L of dimethylformamide is treated portionwise over 15 minutes with 20.1 g (60% dispersion in mineral oil) of sodium hydride in a nitrogen atmosphere. After stirring at room temperature for 30 minutes, the mixture was treated dropwise with methyl iodide (31.3 ml) over 10 minutes and stirring was continued for a further 2 hours. The reaction mixture was carefully poured into water and then extracted with ethyl acetate. The organic phase is washed with water,

-50GB 3ϋϊ75Ι B6 then dried over sodium sulphate and then evaporated. The residue was triturated with pentane to give 76 g of the title compound as a light brown solid. Mp 133-134 ° C; 1 H NMR [(CDCl 3): δ 9.86 (1H, s); 8.20 (1H, s); 7.60 (1H, d, J = 2.6 Hz); 7.50 (1H, d, J = 8.9 Hz), 6.96 (1H, dd, J = 8.9 and 2.6 Hz), 3.86 and 3.80 (6H, s).

(b) In a similar manner to that described in Reference Example 2 (a) above, but using indole-3-carbonitrile, 1-methyl-1 H -indole-3-carbonitrile was prepared as a colorless crystalline solid, m.p. to 63 ° C.

(c) In a similar manner to that described in Reference Example 2 (a) above, but using indole-5-carbonitrile, 1-methyl-1 H -indole-3-carbonitrile was prepared as a colorless crystalline solid; mp 77-79 ° C.

(d) In a similar manner to that described in Reference Example 2 (a) above, but using indole-3-carbonitrile and (3-bromopropoxy) -tert-butyldimethylsilane, 1- [3- (tert-butyldimethylsilyloxy)] was prepared. propyl] -1 H -indole-3-carbonitrile, as a clear colorless oil, TLC: R_F = 0.6 (dichloromethane). 1 H NMR (CDCl 3): δ 7.70 (1H, d, J = 8 Hz); 7.56 (1 H, s); 7.39 (1H, d, J = 8Hz); 7.27 (1H, t, J = 8Hz); 7.22 (1H, t, J = 8Hz); 4.25 (2H, t, J = 6Hz); 3.49 (2H, t, J = 6Hz); 1.95 (2H, quintet, J = 6 Hz); 0.87 (9 H, s); 0.00 (6 H, s).

(e) In a similar manner to that described in Reference Example 2 (a) above, but using 5-methoxy-1 H -indole-3-carbonitrile [Reference Example 1 (a)] and (3-bromopropoxy) -tert butyldimethylsilane, 1- [3- (tert-butyldimethylsilyloxy) propyl] -5-methoxy-1 H -indole-3-carbonitrile is prepared as a clear colorless oil, ^!1 H NMR [(CDCl 3 SO 2): δ 8.18 (1H, s); 7.55 (1H, d,

J = 9 Hz); 7.09 (1H, d, J = 2Hz); 6.95 (1H, dd, 3 = 9 and 2 Hz); 4.27 (2H, t, J = 6Hz); 3.82 (3 H, s); 3.53 (2H, t, J = 6Hz); 1.95 (2H, quintet, J = 6 Hz); 0.87 (9 H, s); 0.00 (6 H, s).

(r) In a similar manner to that described in Reference Example 2 (a) above, but using indole-3-carbonitrile and (2-bromoethoxy) - tert -butyl-dimethylsilane, 1- [2- (tert-butyl) is prepared. dimethylsilyloxy) ethyl] -1 H -indole-3-carbonitrile as a clear colorless oil. TLC: Rf_r Melting point = 0.65 (dichloromethane).

(g) In a similar manner to that described in Reference Example 2 (a) above, but using 5-methoxy-1 H -indole-3-carbonitrile [Reference Example 1 (a)] and benzyl bromide, 1-benzyl is prepared -5-methoxy-1 H -indole-3-carbonitrile, as a brown solid, MS: 263.22 (MH +). TLC: Rf_F = 0.8 (dichloromethane / methanol: 19/1).

(h) In a similar manner to that described in Reference Example 2 (a) above, but using 5-methoxy-1H-indole-3-carbonitrile [Reference Example 1 (a)] and 2-bromoethoxydimethyl-Zerc40 butylsilane, prepare 1- [2- (tert-butyldimethylsilyloxy) ethyl] -5-methoxy-1 H -indole-3-carbonitrile as a pale yellow solid, MS: 331.23 (MH +). TLC: R f = 0.6 (pentane / ethyl acetate: 8/2).

(i) In a similar manner to that described in Reference Example 2 (a) above, but using 17 H -pyrrole-3-carbonitrile (prepared according to the procedure described in Tetrahedron Letters, 1972,

52, 5337-5340), 1-methyl-1 H -pyrrole-3-carbonitrile was prepared as a brown oil, MS: 107 (MH +)⁺). Ή NMR [CDCl 3: δ 7.09 (1H, m); 6.60 (1H, m); 6.40 (1H, m); 3.68 (3H, s), (j) In a similar manner to that described in Reference Example 2 (a) above, but using 1 H-pyrrole-2-carbonitrile, 1-methyl-17 H -pyrrole is prepared. -2-carbonitrile as a colorless liquid. MS: 106 (MH +). * H NMR [CDCl3]: δ 6.80 (1H, m); 6.67 (1H, m); 6.15 (1H, m); 3.79 (3 H, s).

(k) In a similar manner to that described in Reference Example 2 (a) above, but using

2-phenyl-1 H -pyrrole-4-carbonitrile (prepared according to the procedure described in Synthetic

-51 CZ 301751 B6

Communications, 25, (1995) 6, 795-802), 1-methyl-2-phenyl-1 H -pyrrolo-carbonitrile was prepared as a cream solid with a melting point of 50-51 ° C. MS: 183 (MH &amp; lt; + &amp; gt;).

(1) In a similar manner to that described in Reference Example 2 (a) above, but using

4-methoxy-2- (5-methoxy-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- f] pyridine (Reference Example 39) , 4-methoxy-2- (5-methoxy-1-methyl-1H-indol-3-yl) -1 (toluene-4-sulfonyl) -1H-pyrrolo [2,3-a] pyridine was prepared. as a dark oil, HPLC (Method A): Rt_T = 9.49 minutes. TLC: Rf_F 0.50 (pentane / ethyl acetate: 1/1).

io (m) In a similar manner to that described in Reference Example 2 (a) above, but using

2- (5-Methoxy-1 H -indol-3-yl) -4-phenyl-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine (Reference Example 12 (g)): 2- (5-methoxy-1-methyl-1H-indol-3-yl) -4-phenyl-1-1 (toluene-&gt; sulfonyl) -1H-pyrrolo [2] 3-δ] pyridine as a brown solid. 1 H NMR [(CDCl 3)?₃)₂SO]; δ 8.39 (1H, d, J = 4.4 Hz); 7.71 (2H, d, J = 7.2Hz); 7.63 (3 H, m); 7.52 (2 H, t,

J = 8.5 Hz); 7.44 (3 H, m); 7.29 (2H, d, J = 7.2Hz); 6.94 (1H, s); 6.86 (1H, d, J = 8.5 Hz); 6.82 (1H, s); 3.86 (3 H, s); 3.71 (3 H, s); 2.29 (3 H, s).

Reference Example 3 (a) 6- {1- [3- (tert-Butyldimethylsilyloxy) propyl] -1 H -indol-3-yl} -5 H -pyrrolo [2,3- b] pyrazine

In a similar manner to that described in Reference Example 1 (a) above, but using 1- [3- (tert-butyldimethylsilyloxy) propyl] -1 H -indole-3-carbonitrile [Reference Example 2 (d)], to prepare the title compound as a solid, 1 H NMR (CDCl 3)₃)₂SO]: δ 12.1 - 12.2 (1H, broad s); 8.27 (1H, d, J = 2.7Hz); 8.14 (1H, s); 8.10, 7.59 (1H each, d, J = 7.8 Hz); 8.09 (1H, d, J = 2.7 Hz); 7.29, 7.23 (1H each, td, J = 7.1 and 1.1 Hz); 6.96 (1H, s); 4.33 (2H, t, J = 7.1Hz); 3.62 (2H, t, J = 6.0 Hz); 2.03 (2H, quintet, J = 6.2 Hz); 0.89 (9 H, s); 0.00 (6 H, s). MS: 407 (MH @ +)⁺).

(b) In a similar manner to that described in Reference Example I (a) above, but using 1- [3- (tert -butyldimethylsilyloxy) propyl] -5-methoxy-1 H -indole-3-carbonitrile [Reference Example 2 (e)], 6- {1- [3- (tert-Butyldimethylsilyloxy) propyl] -5-methoxy-1 H -indol-3-yl} -5 H -pyrrolo [2,3- b] ] pyrazine as a solid, TLC: R_F 0.4 (ethyl acetate / pentane: 1/1).

δΗ (d⁶ DMSO) 8.27 (1H, d, 4 Hz); 8.08 (2 H, m); 7.50 (2 H, m); 6.96 (1H, s); 6.91 (1H, dd, 6.2 Hz); 4.29 (2H, t, 6Hz); 3.89 (3 H, s); 3.61 (2H, t, 6Hz); 2.00 (2 H, m); 0.89 (9 H, s); 0.03 (6 H, s). DMSO stands for dimethylsulfoxide.

(c) In a similar manner to that described in Reference Example 1 (a) above, but using 1- [2- (tert-butyldimethylsilyloxy) ethyl] -1 H -indole-3-carbonitrile [Reference Example 2 (0) , 6- {1- [3- (tert-Butyldimethylsilyloxy) ethyl] -1 H -indol-3-yl} -5 H -pyrrolo [2,3- b] pyrazine was prepared as a solid, TLC: R_F = 0.3 (ethyl acetate / pentane: 1/1), MS: 393 (MH +), (d) In a similar manner to that described in Reference Example I (a) above, but using 1- [2- (tert-butyl). -butyldimethylsilyloxy) ethyl] -5-methoxy-1 H -indole-3-carbonitrile [Reference Example 2 (h)], prepare 6- {1- [2- (tert -butyldimethylsilyloxy) propyl] -5-methoxy- 1 H -indol ™ 3-yl} -5 H -pyrrolo [2,3- b] pyrazine as a brown solid, TLC: R_F = 0.4 (dichloromethane / methanol: 19/1). MS: 423 (MH &amp; lt; + &amp; gt;).

Reference Example 4

3- [3- (5H-Pyno [2,3-b] pyrazin-6-yl) indol-1-yl] propyl bromide

-52EN 301751 Bo

To a solution of 1 g of 3- [3- (5H-pyrrolo [2,3-b] pyrazin-6-yl) -indol-1-yl] -propan-1-ol [Example 2 (a)] and 1.59 g of carbon tetrachloride in 40 ml of dichloromethane is added at room temperature over a period of 2 minutes a solution of 1.1 g of triphenylphosphine in 10 ml of dichloromethane. The reaction mixture was stirred at room temperature for 3 hours, then allowed to stand for 18 hours and then evaporated to give the title compound which was used without further purification.

Reference Example 5

Indolizine-1-carbonitrile

A mixture of 2-pyridylacetonitrile (5 g) and chloroacetaldehyde (4.42 g, 50% by weight in water) was refluxed in 1,4-dioxane (25 ml) for 5.5 hours. The reaction mixture was allowed to cool to room temperature. The residue was partitioned between 100 mL of ethyl acetate and 100 mL of 1M hydrochloric acid, the aqueous layer was extracted twice with 100 mL of ethyl acetate, the combined organic phases were washed with 50 mL of brine, then dried over magnesium sulfate and evaporated. The residue was purified by silica gel column chromatography eluting with dichloromethane to give 1.83 g of the title compound as a colorless solid, mp 53-54 ° C. MS: 143 (MH &amp; lt; + &amp; gt;).

Reference Example 6

3-Methylindolizine-1-carbonitrile

A solution of 36 ml of propionaldehyde in 200 ml of diethyl ether and 1.7 ml of 1,4-dioxane was treated dropwise with 24.7 ml of bromine under nitrogen atmosphere at 5 ° C over 2 hours, maintaining the temperature at 5 ° C. After the addition was complete, the reaction mixture was stirred for an additional 30 minutes and then washed carefully with 100 mL of saturated aqueous sodium bicarbonate. The organic phase is dried over sodium sulphate and then evaporated in vacuo at 10 ° C and then a solution of 8.36 g of 2-pyridylacetonitrile in 50 ml of acetone is immediately added. The resulting mixture was refluxed under nitrogen for 6 hours, then allowed to stand at room temperature overnight and evaporated. The residue was partitioned between ethyl acetate (500 ml) and 1M hydrochloric acid (100 ml). The organic layer was washed with 100 mL brine and then evaporated. The residue was purified by flash column chromatography on silica gel eluting with ethyl acetate / pentane (1: 4, v / v) and then triturated with diethyl ether to give 4.0 g of the title compound as a white solid, m.p. 98-100 °. C. MS: 157 (MH +).

Reference Example 7 Sodium 1-formylpiperidine-2-carboxylate

To a solution of 39 g piperidine-2-carboxylic acid in 230 ml formic acid was added dropwise 147 ml 45 acetic anhydride. The ongoing exothermic reaction was controlled by cooling the reaction mixture in an ice / water bath. After stirring at room temperature for 24 hours, the reaction mixture was diluted with ml of water and then evaporated in vacuo. The oil obtained is dissolved in a mixture of 50 ml of methanol and 500 ml of acetonitrile. 23 ml of 10M sodium hydroxide solution were added and the reaction mixture was stirred for 8 hours. The resulting precipitate was filtered off, washed with acetonitrile and ethyl acetate and dried in a vacuum oven to give the title compound as a white solid which was used immediately without further purification.

-53EN 301751 B6

Reference Example 8

5,6,7,8-Tetrahydroindole isine-1-carbonitrile

To a solution of 2.0 g of sodium 1-formylpiperidine-2-carboxylate (Reference Example 7) in 50 ml of dichloromethane at room temperature under a nitrogen atmosphere was added 2.31 g of para-toluenesulfonyl chloride. After stirring for 10 minutes, the mixture is treated dropwise with 0.88 ml of acrylonitrile and 1.5 ml of triethylamine and stirring is continued for an additional 1 hour and a second portion of 1.0 ml of triethylamine is added. The reaction mixture was stirred for 18 hours and the dichloromethane was evaporated in vacuo. The residue is taken up in 50 ml of water and extracted with 200 ml of ethyl acetate. The combined organic extracts were evaporated in vacuo and the residue was purified by flash column chromatography on silica gel eluting with ethyl acetate / pentane (1: 4, v / v) to give 1.38 g of the title compound as an orange oil, MS: 147 ( ) *). 1 H NMR (CDCl 3): δ 6.48 (1H, d, J = 3.1 Hz); 6.36 (1H, d, J = 3.1 Hz);

3.91 (2H, t, J = 6.0 Hz); 2.89 (2H, t, J = 6.0 Hz); 1.98 (2 H, m); 1.88 (2 H, m).

Reference Example 9 (a) HToluene (4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine

To a solution of 25 g of 7-azaindole, 44.5 g of r-toluenesulfonyl chloride and a catalytic amount of tetrabutylammonium sulfate in 300 ml of dry toluene was added 160 g of sodium hydroxide dissolved in 500 ml of water. The biphasic solution was stirred at room temperature for 3 hours, then extracted twice with 100 ml of toluene. The combined extracts were dried over magnesium sulfate and then evaporated in vacuo. The solid obtained was triturated with diethyl ether and then dried at 60 ° C under vacuum to give 39.74g of the title compound as a light yellow solid, mp 136-138 ° C.

(b) Following a similar procedure described in Reference Example 9 (a) above, but using

4-nitro-1H-pyrrolo [2_}3-δ] pyridine (prepared according to the procedure of A. Ippolito et al., J Med.

Chem. (1982), 25 (10), 1258-61), 4-nitro-1- (1-toluene-4-sulfonyl) -1 H -pyrrolo [2,36] pyridine was prepared as an orange solid, m.p. to 146 ° C. HPLC (Method A): Rt_T - 10.80 minutes.

(c) Following a similar procedure described in Reference Example 9 (a) above, but using

4-chloro-1 H -pyrrolo [2,3- b] pyridine (Reference Example 64) was prepared 4-chloro-1-O-toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine white solid. MS: 307 (MH &amp; lt; + &amp; gt;). 1 H NMR (CDCl 3)?₃δ 8.3 (d, 1H), 8.05 (d, 2H), 7.8 (d, 1H), 7.3 (d, 2H), 7.2 (d, 1H), 6.7 (d, 1H); 2.4 (s, 3H).

(d) Following a similar procedure to that described in Reference Example 9 (a) above, but using

5-Bromo-1 H -pyrrolo [2,3- b] pyridine was prepared by 5-bromo-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine as a white solid, m.p. mp 138-140 ° C.

(e) Following a similar procedure described in Reference Example 9 (a) above, but using

4-Phenyl-1 H -pyrrolo [2,3- b] pyrazine (Reference Example 42) was prepared 4-Phenyl-1- (1-toluene-4sulfonyl) -1 H -pyrrolo [2,3- b] pyrazine as a white solid which was used without further purification. @ 1 H NMR .delta₃)₂SO]: δ 8.44 (1H, d, J = 4.5Hz); 8.04 (2H, d, J = 8.2Hz); 7.98 (1H, d, J = 4.5Hz); 7.69 (2H, d, J = 6.8 Hz); 7.57 (tt, J = 6.2, 1.8 Hz); 7.51 (1H, tt, J = 6.8, 1.8 Hz); 7.44 (2H, d, J = 8.2Hz); 7.42 (1H, d, J = 4.5Hz); 6.92 (1H, d, J = 4.5Hz).

Reference Example 10

2-Iodo-1- (toluene-N-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine

-54GB 30i75i Bo

A solution of 54.4 g of 1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 9 (a)] in 1200 ml of dry tetrahydrofuran is cooled to -78 ° C and reacted with 20 ml of a 2.5M solution of butyllithium in hexane. The solution is kept at -78 ° C for 30 minutes, then a solution of 101 g of iodine in 600 ml of tetrahydrofuran is added until the mixture remains iodine-colored (ca.

300 ml). The mixture was allowed to warm slowly to room temperature and the solvent was evaporated in vacuo.

The residue was partitioned between 1000 mL of ethyl acetate and 500 mL of water and the aqueous phase was extracted twice with 500 mL of ethyl acetate. The organic extracts were combined, dried over sodium sulfate and evaporated in vacuo to give a yellow solid which was triturated with diethyl ether to give 79.6 g of the title compound as a pale yellow solid, mp 105-107 ° C. C. MS: 399 (MH &amp; lt; + &amp; gt;).

io

Reference Example 11 (a) 3-Bromo-5-methoxyindole-1-carboxylic acid tert-butyl ester

A solution of 10 g of 5-methoxyindole in 150 ml of dry dimethylformamide is treated dropwise with 5 ml of bromine at room temperature, ensuring that the temperature does not exceed 30 ° C. The mixture is immediately reacted with 25 ml of triethylamine and 0.5 g of 4-dimethylaminopyridine, and then a solution of 18 g of di-tert-butyl dicarbonate in 80 ml of dry dimethylformamide is added and stirring is continued for a further period.

4 clock. The reaction mixture was evaporated and the residue was partitioned between 250 mL of ethyl acetate and 200 mL of water.

The aqueous layer was extracted with 100 mL of ethyl acetate. The combined organic phases are washed with 100 ml of water, then 100 ml of brine, then dried over magnesium sulphate and evaporated. The residue was purified by flash column chromatography on silica gel eluting with a mixture of pentane and ethyl acetate (19/1, v / v) to give 23.4 g of a colorless solid, mp 111-112 ° C.

(b) Following a similar procedure to that described in Reference Example 11 (a) above but using 5-cyanoindole, 3-bromo-5-cyanoindole-1-carboxylic acid tert-butyl ester was prepared as a gray solid, m.p. 172 to 174 ° C. MS: 322 (MH +);⁺).

(c) Following a similar procedure described in Reference Example 11 (a) above, but using

5,6-dimethoxyindole, 3-bromo-5,6-dimethoxyindole-1-carboxylic acid tert-butyl ester is obtained as a violet solid. TLC: Rf_F = 0.6 (pentane / ethyl acetate; 19/1).

(d) Following a similar procedure described in Reference Example 11 (a) above, but using

5-Benzyloxy-6-methoxyindole [prepared according to the procedure described in Benign, JD and Minnis, RL, Heterocycles, 387, 2, 1965], 5-benzyloxy-3-bromo-6-methoxyindole-1-carboxylic acid tert-butyl ester is prepared as colorless solids. MS: 433 (MH +)⁺HPLC (Method A): R t = 13.99 min.

(e) Following a similar procedure described in Reference Example 11 (a) above, but using

Of 5-aminoindole and an excess of di-tert-butyl dicarbonate, 3-bromo-5-tert-butoxycarbonylaminoindole-1-carboxylic acid tert-butyl ester is prepared as an orange oil. MS: 412 (MH +)⁺). TLC: Rf_F = 0.8 (pentane / ethyl acetate: 9/1).

(f) Following a similar procedure to that described in Reference Example 11 (a) above, but using 1 H -indole-6-carboxylic acid methyl ester [Reference Example 31], 3-bromoindole-1-tert-butyl ester 6-methyl ester was prepared. 6,6-dicarboxylic acid as a violet solid, m.p. 117-119 ° C. MS: 355 (MH &amp; lt; + &amp; gt;).

Reference Example 12 (a) 2- (5-Methoxy-1 H -indol-3-yl) -1 '(toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine

-55GB 301751 B6

A stirred solution of 50 g of 3-bromo-5-methoxyindole-1-carboxylic acid tert-butyl ester [Reference Example 11 (a)] in 800 ml of tetrahydrofuran is treated with 49.5 ml of tributyl borate under nitrogen, then cooled to - 100 ° C and treated with 94 mL of a 2.5 M solution of n-butyllithium in hexane while maintaining the temperature below -90 ° C. Once the addition is complete, the mixture is allowed to warm slowly to room temperature over 1 hour and quenched by the addition of 10 g of ice. The organics were evaporated under reduced pressure and the residue was partitioned between 500 mL of ethyl acetate and 400 mL of water. The organic layer was dried over magnesium sulfate and then evaporated. The obtained boronic acid, which is in the form of 28 g of a beige solid, is dissolved in 600 ml of dimethylformamide and treated with 38.3 g of 2-iodo-1- (toluene-4-sulfonyl) -1H-pyrrolo [2]. 3-a] pyridine 10 [Reference Example 10], then with 200 ml of a saturated aqueous solution of sodium bicarbonate and then with 3 g of tetrakis (triphenylphosphine) palladium [0], and refluxed for 4 hours, then cooled. to room temperature and dimethylformamide was evaporated. The residue is partitioned between 400 ml of water and 500 ml of ethyl acetate and the aqueous phase is extracted twice with 300 ml of ethyl acetate. The combined organic phases were dried over sodium sulfate and then evaporated. The remaining brown gum was triturated with ethyl acetate to give 27 g of the title compound as a light green solid. MS: 418.43 (MH +)⁺).

(b) Following a similar procedure to that described in Reference Example 12 (a) above, but using 3-bromo-5-cyanoindole-1-carboxylic acid tert -butyl ester [Reference Example 11 (b)], 3- [1] was prepared. - (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridin-2-yl] -1,7-indole-5-carbonitrile as a colorless solid, m.p. 209-214 ° C. MS: 413 (MH +).

(c) Following a similar procedure to that described in Reference Example 12 (a) above but using 3-bromo-5,6-dimethoxyindole-1-carboxylic acid tert -butyl ester [Reference Example

11 (c)], 2- (5,6-dimethoxy-1H-indol-3-yl) -1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3A] pyridine is prepared in brown, solid. MS: 446 (MH +).

(d) Following a similar procedure to that described in Reference Example 12 (a) above but using 5-benzyloxy-3-bromo-6-methoxyindole-1-carboxylic acid tert-butyl ester [Reference Example 11 (d)], 2- (5-benzyloxy-6-methoxy-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine was prepared in colorless form, solids. MS: 524 (MH &amp; lt; + &amp; gt;). HPLC (Method A): Rt_T = 10.09 minutes.

(e) Following a similar procedure to that described in Reference Example 12 (a) above, but using 3-bromo-5-tert-butoxycarbonylamino-1-carboxylic acid tert-butyl ester [Reference Example 11 (e)], Preparation of {3- [1- (Toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yl} carbamic acid tert -butyl ester as brown , solids. MS: 503 (MH +). TLC: R f = 0.62 (pentane / ethyl acetate: 1/1).

(f) Following a similar procedure described in Reference Example 12 (a) above, but using

3-Bromoindole-1,6-dicarboxylic acid 1- tert -butyl ester tert -butyl ester [Reference Example 11 (f)], 3- [1- (toluene-4-sulfonyl) -1 H -methyl] ester was prepared. pyrrolo [2,3-a] pyridin-2-yl] -1_J(R) Indole-6-carbamic acid as a pale yellow solid, m.p. 214-216 ^ATC. MS: 446 (MH &amp; lt; + &amp; gt;).

(g) Following a similar procedure described in Reference Example 12 (a) above, but using

2-Iodo-4-phenyl-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- a] pyridine [Reference Example 62 (d)] was prepared 2- (5-methoxy-17 H) Indol-3-yl) -4-phenyl-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine as a white solid. HPLC (Method A): Rt_T = 11.63 minutes. MS: 494 (MH +).

(h) Following a similar procedure to that described in Reference Example 12 (a) above, but using

4-Chloro-2-iodo-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 62 (b)] was prepared by 4-chloro-2- (5- methoxy-1H-indol-3-yl) -1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridine as a white solid. MS: 452 (M +). 1 H NMR (CDCl 3): δ 8.4 (d, 1H), 7.6 (d, 2H),

7.5 (s, 1H), 7.35 (d, 1H), 7.2 (d, 2H), 6.9 (m, 2H), 6.7 (s, 1H), 3.8 (s) 3H), 2.3 (s, 3H).

(I) Following a similar procedure to that described in Reference Example 12 (a) above, but using 2-iodo-5-phenyl-1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3] pyridine [Reference Example 62 (c)] was prepared 2- (5-methoxy-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -5-phenyl-1 H- pyrrolo [2,3-b] pyridine. MS: 494 (MH +).

(j) Following a similar procedure to that described in Reference Example 12 (a) above, but using 4-chloro-2-iodo-1- (pan-toluenesulfonyl) -1 H -pyrrolo [2,3- b] pyridine [ Reference Example 62 (b)] and 4-tert-butylphenylboronic acid, 4-chloro-244- (tert-butylphenyl) -1- (para-toluenesulfonyl) -1 H -pyrrolo [2,3- f] pyridine was prepared in white solid. MS: 439 (MH +). TLC Rf = 0.78 (ethyl acetate / heptane, 1: 1).

Reference Example 13 (a) {5-Methoxy-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] indol-1-yl} -acetic acid ethyl ester

A solution of 6.6 g of 2- (5-methoxy-1 H -indol-3-yl) -14 toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example] 12 (a)] in 100 ml of dimethylformamide was treated with 700 mg of sodium hydride (60% dispersion in mineral oil) under a nitrogen atmosphere. After stirring at room temperature for 30 minutes, the mixture was treated dropwise with 2.0 mL (23.75 mmol) of ethyl chloroacetate and stirring was continued for another 4 hours. The reaction mixture was evaporated and the residue was partitioned between ethyl acetate and water. The organic phases were washed with brine, then dried over sodium sulfate and evaporated to yield

5.77 g of the title compound as a yellow solid, MS: 504 (MH +);⁺). HPLC (method

A): R_T = 11.88 minutes.

(b) Following a similar procedure to that described in Reference Example 13 (a) above but using methyl iodide, 2- (5-methoxy-1-methyl-1H-indol-3-yl) -1- (toluene) was prepared. 4-Sulfonyl-1 H -pyrrolo 4 H -pyridine, as a yellow solid, m.p. 103-105 ° C. MS: 432 (MH +).

(c) According to a similar procedure described in Reference Example I3 (a) above, but using

3- [1- (toluene-4-sulfonyl) -1 H -pyrido [2,3- b] pyridin-2-yl] -1 H -indole-5-carbonitrile [Reference Example 12 (b)] and methyl iodide, prepare 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1H-indole-5-carbonitrile, m.p. 189 DEG-191 DEG C. MS: 427 (MH @ +).

(d) Following a similar procedure to that described in Reference Example 13 (a) above but using 2- (5,6-dimethoxy-1H-indol-3-yl) -1- (toluene-4-sulfonyl) -1 N -pyrrolo [2,3-b] pyridine [Reference Example 12 (c)] and methyl iodide, 2- (5,6-dimethoxy-1-methyl-1H-indol-3-yl) -1 - (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine, as a brown solid, MS: 462 (MH +).

(e) Following a similar procedure described in Reference Example 13 (a) above, but using

2- (5-Benzyioxy-6-methoxy-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 12 (d)] and methyl iodide, 2- (5-benzyloxy-6-methoxy-1-methyl-1H-indol-3-yl) -1- (toluene-4-sulfonyl) -1H-pyrrolo [2] are prepared. 3-pyridine as a colorless solid. MS: 538 (MH +). HPLC (method A); R_T = 11.57 minutes.

(f) Following a similar procedure to that described in Reference Example 13 (a) above but using {3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine tert -butyl ester] -2-yl] -1 H -indol-5-yl} carbamic acid [Reference Example I2 (e)] and methyl iodide, prepare {1-methyl-3- [1- (toluene-4-sulfonyl) tert -butyl ester 1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yl} carbamic acid as a brown solid. MS: 517 (MH +). TLC: Rf = 0.7 (pentane / ethyl acetate: 1/1).

(G) Following a similar procedure to that described in Reference Example 13 (a) above, but using 3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine methyl ester -2-yl] -1 H -indole-6-carboxylic acid [Reference Example 12 (f)] and methyl iodide, prepare 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [methyl] ester 2,3-l] pyridin-2-yl] -1 H -indole-6-carboxylic acid as a brown solid. MS: 460 (MH +)⁴). TLC: Rf_F = 0.6 (pentane / ethyl acetate: 1/1).

(h) Following a similar procedure to that described in Reference Example 13 (a) above, but using 2- (5-methoxy-1 H -indol-3-yl) -] - (toluene-^andsulfonyl) -1 H -pyrrolo [2,3- a] pyridine-4-carbonitrile [Reference Example 100] was prepared 2- (5-methoxy-1-methyl-1 H -indol-3-yl) - 1- (Toluene-4-sulfonyl-1 H -pyrrolo [2,3- f] pyridine-4-carbonitrile as a yellow oil) TLC: R_F 0.40 (ethyl acetate: heptane 1: 1). MS: 457 (MH +)⁴(i) According to a similar procedure described in Reference Example 13 (a) above, but using

4-chloro-2- (5-methoxy-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- e] pyridine [Reference Example 12 ( h)] and methyl iodide, prepare 4-chloro-2- (5-methoxy-1-methyl-1H-indol-3-yl} -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] δ] pyridine as an off-white solid MS: 466 (MH +);⁺). @ 1 H NMR (CDCl3)₃): δ 8.35 (d, 1H); 7.56 (d, 2H), 7.39 (s, 1H); 7.16-7.3 (m, 2H), 7.05 (d, 2H), 6.95-7.0 (m, 2H), 6.6 (s, 1H) 3.9 (s, 3H) ), 3.8 (s, 3H), 2.3 (s, 3H).

(j) Following a similar procedure to that described in Reference Example 13 (a) above, but using

2- (5-methoxy-1 H -indol-3-yl) -5-phenyl-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 12 (i)] and methyl iodide, 2- (5-methoxy-1-methyl-1 H -indol-3-yl) -5-phenyl-1- (toluene-4-sulfonyl-1 H) - Pyrrolo [2,3-d] pyridine as a yellow solid, m.p. 181-183 ° C MS: 508 (MH +)⁴).

Reference Example 14 (a) 1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-5 -ol

To a solution of 24.5 g of 2S-methoxy-1-methyl-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 13 (b)] in 500 mL of dichloromethane at 0 ° C under nitrogen atmosphere was added 60 mL of a 1.0 M solution of boron tribromide in dichloromethane and the mixture was stirred at 0 ° C for 1 hour. The reaction mixture was allowed to warm slowly to room temperature and stirring was continued

12 hours. 250 ml of 1M sodium carbonate solution was added to the mixture, and vigorous stirring was continued for a further 3 hours. The precipitated solid was filtered off, washed with 100 ml of dichloromethane and dried to give 18.75 g of the title compound as a colorless solid, mp 256-257 ° C. MS: 418 (MH +)⁴).

(b) Following a similar procedure described in Reference Example 14 (a) above, but using

2- (5-methoxy-1 H -indol-3-yl) -toluene-&gt; sulfonyl) -1 H -pyrrolo [2,3- f] pyridine [Reference Example 12 (a)] was prepared 3- [1- (toluene-4-sulfonyl-1 H -pyrrolo [2,3- f] pyridin-2-yl] -1 H -indol-5-ol as a beige solid, m.p. 188-191 ° C. MS: 403 (MH +);⁴).

Reference Example 15 (a) 2- (5-Allyloxy-1-methyl-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] ] pyridine

A solution of 2.1 g of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-ol [ Reference Example 14 (a)] in 50 ml of dry dimethylformamide was treated with 620 mg of potassium tert -butoxide at 0 ° C under nitrogen. After stirring for 10 minutes, the mixture is treated with 480 μΐ allyl bromide and then allowed to warm slowly to room temperature. Stirring is continued for another 6 hours, then the reaction mixture is carefully poured into water and the aqueous phase is extracted

-58GB 30751 B6 thoroughly with ethyl acetate. The combined organic extracts were washed twice with 100 ml brine, then dried over sodium sulfate and evaporated. The residue was purified by flash column chromatography on silica gel eluting with ethyl acetate / pentane (1: 1, v / v) to give 1.2 g of the title compound as a yellow foam, mp 257-259 ° C. MS: 458 (MH +) · (b) Following a similar procedure to that described in Reference Example 15 (a) above but using ethyl 2-chloroacetate, {1-methyl-3- [1- ( toluene-4-sulfonyl-1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} acetic acid as a yellow solid TLC: R_F = 0.45 (ethyl acetate / pentane: 1/1). MS: 504 (MH +).

(c) Following a similar procedure to that described in Reference Example 15 (a) above but using ethyl 2-bromopropionate, 3- {1-methyl-3- [1- (toluene-4-sulfonyl) -ethyl ester was prepared. 1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} propionic acid as a yellow solid TLC: R_F = 0.47 (ethyl acetate / pentane: 1/1). MS: 519 (MH +).

(d) Following a similar procedure to that described in Reference Example 15 (a) above, but using ethyl 1-bromocyclobutanecarboxylate, 1- {1-methyl-3- [1- (toluene-4-sulfo-4-sulfo) -ethyl ester was prepared. N-1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} cyclobutanecarboxylic acid as a colorless solid, m.p. 189-190 ° C. 544 (MH +).

(e) Following a similar procedure to that described in Reference Example 15 (a) above but using 1-methyl-3- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) -1] N -indol-5-ol (Example 7) and ethyl 1-bromocyclobutanecarboxylate, {1- [1-methyl-3- (5H-pyrrolo [2,3-a] pyrazin-6-yl) -1-ethyl ester was prepared. (f-Indol-5-yloxy) cyclobutylcarboxylic acid as a brown solid. TLC:

R_F = 0.23 (dichloromethane / methanol, 19: 1). HPLC (Method A): Rt_T = 7.71 minutes.

Reference Example 16

3- {1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} propane-1,2-diol

A solution of 45.7 mg of 2- (5-allyloxy-1-methyl-1 H -indol-3-ol) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 15 (a)] in 10 ml of acetone is treated with a solution of 6 ml

Of 4-methylmorpholine-N-oxide in 1 ml of water. This mixture was then treated with 6 drops of a 2.5% (w / w) solution of osmium tetroxide in tert-butanol and stirred at room temperature for 12 hours. The reaction mixture was diluted with 75 mL of water and extracted thoroughly with ethyl acetate. The combined organic extracts were washed twice with 75 mL brine, then dried over magnesium sulfate and evaporated. The residue was purified by flash column chromatography on silica gel, eluting with ethyl acetate, to give 33 mg of the title compound as a colorless solid. TLC: Rf = 0.25 (ethyl acetate). MS: 492 (MH &amp; lt; + &amp; gt;).

Reference Example 17

3- {1-Methyl-3- [1- (toluene-4'-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} " propan-1,2-ol and 3- {1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole- 5-yloxy} propan-2-ol

A solution of 91 mg of 2- (5-allyloxy-1-methyl-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 15 (a)] in 5 ml of dry tetrahydrofuran is reacted with 1200 μΐ of a 1.0 M solution of borane-tetrahydrofuran complex in tetrahydrofuran. After stirring at room temperature for 7 hours, the reaction mixture was treated with 9 drops of ethanol, 4 drops of 5N potassium hydroxide solution and 6 drops of hydrogen peroxide, and stirring was continued for 12 hours during which time a white solid precipitated. The reaction mixture was diluted with 50 mL of water and the pH of this mixture was adjusted by addition of 1M

The solution was then extracted thoroughly with ethyl acetate. The combined organic extracts were dried over sodium sulfate and then evaporated. The residue was purified by flash column chromatography on silica gel eluting with a mixture of ethyl acetate and pentane (2: 1, v / v) to give 50 mg of 3- (1-methyl-3- [1- (toluene-4-sulfonyl)) -1]. t-pyrrolo [2,3-d] pyridin-2-yl] -1H-indol-5-yloxy} propan-1-ol as a colorless solid. [TLC: Rf₍ 0.15 (ethyl acetate). MS: 476 (MH +)] and 8 mg of 3- {1-methyl- [1 '(toluene-4-sulfonyl) -1 H -pyrido [2,3- b] pyridin-2-yl] -1 H- indol-5-yloxy} propan-2-ol as a colorless solid. [TLC: Rf_F = 0.3 (ethyl acetate); MS: 476 (MH +)].

Reference Example 18 (a) 1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5 -fluoromethanesulfonic acid ester

Suspension 398 mg of 1-methyl-3- [1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridin-2-yl] -1 H -indol-5-ol [Reference Example 14 (a)] in 10 ml of dichloromethane is cooled to -78 ° C under nitrogen and treated with 0.15 ml of triethylamine and then with 1.7 g of N-phenyltrifluoromethanesulfonimide. The resulting mixture was allowed to warm slowly to room temperature, stirring continued for another

12 hours, and then 20 ml of saturated aqueous sodium bicarbonate solution are added.

The organic phase is separated and the aqueous phase is extracted twice with 20 ml of dichloromethane. The combined organic phases were dried over sodium sulfate and then evaporated. The residue was purified by flash column chromatography on silica gel eluting with ethyl acetate / pentane (2: 3, v / v) to give 380 mg of the title compound as a colorless solid. MS: 492 (MH &amp; lt; + &amp; gt;).

HPLC (Method A): Rt_T = 2.02 minutes, (b) Following a similar procedure to that described in Reference Example 18 (a) above, but using 1-methyl-3- (5H-pyrrolo [2,3-b] pyrazin-6-yl). 1 H -indol-5-ol (Example 7), 241-methyl-5-trifluoromethylsulfonyloxyindol-3-yl) -1 H -pyrrolo [2,3- b] pyrazine was prepared as a red solid. HPLC (Method A): Rt_T = 8.12 minutes. @ 1 H NMR₃)₂SO]: δ 12.30 (IH, s); 8.32 (1H, s); 8.27 (1H, d, J = 3.5Hz); 8.23 (1H, s); 7.97 (1H, s); 7.76 (1H, d, J = 8.6 Hz); 7.08 (1H, s); 3.96 (3 H, s).

Reference Example 19 (a) 1-Methyl-3- [14-toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-5-carboxylic acid methyl ester

A solution of 300 mg of trifluoromethanesulfonic acid 1-methyl-3- [14-toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yl ester [Reference Example 18 (a) ] in a mixture of 10 ml of dry dimethylformamide, 6 ml of methanol and 2 ml of triethylamine is treated with 24 mg of palladium acetate and 1,3-bis (diphenylphosphino) propane and stirred at room temperature for 30 minutes. Carbon monoxide is introduced into the reaction vessel through the septum at a constant rate and the mixture is heated to

90 ° C until starting material disappears according to TLC (ethyl acetate / pentane: 2/3). The mixture was then evaporated in vacuo and the residue partitioned between dichloromethane and water. The organic phase is washed with saturated lithium chloride solution, then dried over sodium sulphate and evaporated. The residue was purified by flash column chromatography on silica gel eluting with a mixture of ethyl acetate and pentane (2: 3, v / v) to give 200 mg of the title compound as a colorless solid. MS:

4 60 (MH +). HPLC (Method A): Rt_T = 10.23 minutes.

(b) Following a similar procedure to that described in Reference Example 19 (b) above but using 241-methyl-5-trifluoromethylsonyloxyindol-3-yl) -1 H -pyrrolo [2,3- b] pyrazine (Reference Example 18 (b)), methyl 1-methyl-345H-pyrrolo [2,3-b] pyrazin-6-yl) -1 H -indole-555 carboxylate was prepared as a brown solid. MS: 307 (MH &amp; lt; + &amp; gt;). HPLC (Method A): Rt_T = 6.64 minutes.

-60GB 30175I BOO

Reference Example 20

2- [1-Methyl-5- (1-trimethylstannyl-1H-tetrazol-5-yl) -1H-indol-3-yl] -1- (toluene-1H-sulfonyl) -1H-pyrrolo [2] 3-6] pyridine

A solution of 100 mg of 1-methyl-3- [Htoluene-1-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] indole-5-carbonitrile [Reference Example 13 (c)] in 10 ml of toluene was treated with 56 mg (0.28 mmol) of trimethyltin azide and then heated under reflux for 14 hours. The white precipitate was filtered off and washed with 10 mL of toluene and then dried to give 125 mg of the title compound as a colorless solid, mp 240-243 ° C (dec.). MS: 633 (MH).

Reference Example 21

2- [1-Methyl-5- (1-methyl-1H-tetrazol-5-yl) -1H-indol-3-yl] -1- (toluene-1-sulfonyl) -1H-pyrrolo [2, 1-methyl-1H-indol-3-yl] 3-]] pyridine and 2- [1-methyl-5- (2-methyl-2H-tetrazol-5-yl) -1 H -indol-3-yl] -1 (toluene-4-sulfonyl) -1 H -pyrido [2,3- b] pyridine

2.5 mg of methyl iodide is added to a solution of 620 mg of 2- [1-methyl-1-5- (1-trimethylstannanyl-1 H -tetrazol-5-yl) -1 H -indole-3-y at room temperature. 1-] - 1- (toluene-4-sulfonyl-1H-pyrrolo [2,3-a] pyridine [Reference Example 20] The mixture was then allowed to stir for 4 hours at room temperature, poured into water and then extracted with ethyl acetate. brine, then dried over magnesium sulphate and evaporated. The residue was purified by flash column chromatography on silica gel eluting with ethyl acetate / petroleum ether (1: 1, v / v) to give 191 mg of 2- [1-methyl-5- (1-methyl-1H) -tetrazol-5-yl 1 H -indol-3-yl] -1- (toluene-4sulfonyl) -1 H- pyrrolo [2,3- a] pyridine as a colorless solid [MS: 506 (MNa)]. 1 HNMR [(CD₃)₂SO]: δ 8.39 (dd, 1H, J = 4.8 and 1.6 Hz); 7.97 (m, IH); 7.96 (d, 1H, J = 4.0Hz);

7.90 (s, 1 H); 7.80 (dd, 1H, J = 8.7 and 0.6 Hz); 7.70 (dd, 1H, J = 8.7 and 1.8 Hz); 7.56 (m, 2 H); 7.30 (dd, 1H, J = 7.7 and 4.8 Hz); 7.22 (m, 2 H); 6.82 (s, 1 H); 4.19 (s. 3H); 4.0 (s. 3H); 2.23 (s, 3H)] and 77 mg of 2- [1-methyl-542-methyl-2H-tetrazol-5-yl) -1H-indol-3-yl] -1- (toluene-1-sulfones) 1) 1 H -pyrrolo [2,3- d] pyridine as a colorless solid, mp 215-218 ° C [MS: 506 (MNa)].

Reference Example 22

1- {1-Methyl-3- [1- (toluene-1-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-y 1} 40 ethanone

To 110 ml of dry, degassed dimethylformamide was added 2.2 g of 1-methyl-3- [Htoluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine2 under nitrogen at room temperature. trifluoromethanesulfonic acid -1H-indol-5-yl ester [Reference Example 18], 1.15 ml triethylamine, 2.87 ml n-butyl vinyl ether (2.87 ml), 413 mg 1,3-bis (diphenylphosphinopropane) and 232 mg of palladium acetate. The mixture was refluxed for 2 hours, then cooled to room temperature and then added to 90 ml of 1M hydrochloric acid. This mixture was extracted with 200 mL of dichloromethane. The organic extract was washed with a saturated aqueous sodium bicarbonate solution, then brine, dried over magnesium sulfate and then evaporated.

The residue was purified by flash chromatography on silica gel eluting with ethyl acetate / pentane (2: 3, v / v) to give 1.1 g of the title compound as a yellow solid, m.p. 177-178 ° C. MS: 444 (MH).

• 61 GB 301751 B6

Reference Example 23 (a) 2- [5 - ({S} - (+) - 2,2-Dimethyl- [1,3] dioxolan-4-ylmethoxy) -1-methyl-1 H -indol-3- yl] -1 (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine

A solution of 1.17 g of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- f] pyridin-2-yl] -1 H -indol-5-ol [ Reference Example 14 (a)] in 50 ml of dry dimethylformamide was treated with 1.1 g of cesium carbonate and 40 mg of tetrabutylammonium hydrogen sulfate. After stirring at room temperature for 30 minutes, the mixture is treated with 0.96 g of (R) - (+) - 2,2-dimethyl-1,3-dioxolan-4-ylmethyl-paraio toluenesulfonate and then heated to 120 overnight. Deň: 32 ° C. The reaction mixture was evaporated in vacuo and the residue was extracted twice between 100 mL of dichloromethane and 50 mL of water and the aqueous layers were extracted with 100 mL of dichloromethane. The combined organic phases are washed twice with 150 ml of brine, then dried over magnesium sulphate and then evaporated. The residue was purified by flash chromatography on silica gel eluting with a mixture of dichloromethane and methanol (199: 1, v / v) to give 1.04 g of the title compound as a yellow oil, MS: 532 (MH +)⁴). 1 HNMR [(CD₃)₂SO]: δ 1.30 (3H, s); 1.37 (3 H, s); 2.29 (3 H, s); 3.76 (1H, dd, J = 8.3 and 6.5 Hz); 3.90 (3 H, s); 3.94 - 3.98 (2H, m); 4.10 (1H, dd, J = 8.20 and 6.5 Hz); 4.41 (1 H, m); 6.74 (1 H, s); 6.91 (1H, dd, J = 8.8 and 2.3 Hz); 6.98 (1H, d, J = 2.4Hz); 7.25 (2H, d, J = 7.9Hz); 7.29 (1H, dd, J = 7.8 and 4.9 Hz); 7.44 (1H, d, J = 8.8 Hz); 7.56 (1H, d, J = 8.3Hz); 7.63 (1 H, s); 7.81 (2H, d, J = 8.0Hz); 7.92 (1 H, dd,

J = 7.7 and 1.6 Hz); 8.33 (1H, dd, J = 4.9 and 1.7 Hz).

(b) Following a similar procedure to that described in Reference Example 23 (a) above, but using (S) - (-) - 2,2-dimethyl-1,3-dioxolan-4-ylmethyl-p-toluenesulfonate, prepare: 2- [5 - {{R} (-) - 2,2-dimethyl- [1,3] dioxolan-4-ylmethoxy) -1-methyl-1H-indol-3-yl] -1- (toluene) (4-Sulfo-25-yl) -1 H -pyrrolo [2,3- b] pyridine as a yellow oil, MS: 532 (MH +)⁴). @ 1 H NMR .delta₃)₂SO]: δ 1.33 (3H, s), 1.37 (3H, s); 2.29 (3 H, s); 3.77 (1H, dd, J = 8.3 and 6.5 Hz); 3.88 (3 H, s); 3.97-3.99 (2 H, m); 4.11 (1H, dd, J = 8.3 and 6.6 Hz); 4.41 (1 H, m); 6.74 (1 H, s); 6.94 (1H, dd, J = 8.8 and 2.3 Hz); 6.97 (1H, d, J = 2.3H); 7.25 (2H, d, J = 8.1 Hz); 7.29 (1H, dd, J = 7.8 and 4.9 Hz); 7.44 (1H, d, J = 8.8Hz); 7.57 (2H, d, J = 8.4Hz); 7.63 (1 H, s); 7.95 (1H, dd, J = 7.81 and 1.7 Hz); 8.33 (1H, dd, J = 4.88 and 1.7 Hz).

(c) Following a similar procedure to that described in Reference Example 23 (a) above, but using

2- (5-hydroxy-6-methoxy-1-methyl-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example] 28 (a)], 2- [5 - ({S} - (+) - 2,2-dimethyl- [1,3] dioxolane-1,3-methoxymethoxy) -6-methoxy-1-methyl-177 is prepared. 1-Indol-3-yl] -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine as a cream solid. MS: 548 (MH +)⁺). HPLC (Method A): Rt_T - 11.60 minutes.

(d) Following a similar procedure to that described in Reference Example 23 (a) above, but using

3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-ol [Reference Example

14 (b)] and ethyl 1-bromocyclobutanecarboxylate, 1- [1- (ethylcyclobutanecarboxylate) -3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- f] pyridine ethyl ester is prepared. -2-yl] -1 H -indol-5-yloxy) cyclobutanecarboxylic acid as a cream solid. MS: 657 (MH +)⁴). 1 HNMR [(CD₃)₂SO3: δ 8.35 (1H, dd, J = 4.8 and 1.6 Hz); 7.9 (2 H, m); 7.48 (3 H, m); 7.28 (1H, dd, J = 7.7 and 4.8 Hz); 7.24 (2H, d, J = 8.4Hz); 6.71 (1H, dd, J = 8.9 and 2.4 Hz); 6.68 (1 H, s); 6.64 (1 H, d,

J = 2.4 Hz); 5.12 (1H, dd, J = 8.8 and 8.8 Hz); 4.13 - 4.03 (4H, m); 3.66 (1H, dd, J = 9.4 and 9.4 Hz); 2.64-1.82 (13H, m); 1.15 (3H, t, J = 7.1 Hz); 0.94 (3H, t, J = 7.1Hz).

Reference Example 24 (a) (S) -3- {1-Methyl-3- [1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridin-2-yl) -1H- indol-5yloxy} propane-1,2-diol

Solution 1.04 g 2- [5 - ({R} - (-) - 2,2-dimethyl- [1,3] dioxolan-4-ylmethoxy) -1-methyl-1H-indol-3-yl] -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 23 (b)] in 20 ml

The methanol is treated with 20 ml of a 1M hydrochloric acid solution and then heated at reflux for 3 hours. The reaction mixture was evaporated in vacuo and the residue purified by flash chromatography on silica gel eluting with ethyl acetate / pentane (2: 1, v / v) to give 380 mg of the title compound as a clear oil. TLC: Rf_F = 0.2 (pentane / ethyl acetate: 1/2). MS: 492 (MH).

(b) Following a similar procedure to that described in Reference Example 24 (a) above, but using 2- [5 - ({S} - (⁺11-2,2-dimethyl- [1,3] dioxolar-4-ylmethoxy) -1-methyl-1 H -indol-3-yl] -1 (toluene-4-sulfonyl) -1 H -pyrrolo [2,1-d] 3-6] pyridine [Reference Example 23 (a)], yields (R) -3- (1-10-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b]) pyridin-2-yl] -1H-indol-5-yloxy} propane-1,2-diol as a clear oil. MS: 492 (MH &amp; lt; + &amp; gt;). * HNMR [(CD₃}&gt; SO]: δ 8.33 (1H, dd, 4.9, J = 1.7 Hz); 7.92 (1H, dd, J = 7.8 and 1.7 Hz); 7.62 (1H, s); 7.56 (2H, d, J = 8.8Hz); 7.45 (1H, d, J = 8.8 Hz); 7.29 (1H, dd, J = 7.8 and 4.8 Hz); 7.25 (2H, d, J = 8.1Hz); 6.96 (1H, d, J = 2.3 Hz); 6.92 (1H, dd, J = 8.8 and 2.3 Hz); 6.75 (1H, s); 4.93 (1H, $); 4.66 (1H, s); 5.13 (1H, d, J = 5.13 Hz);

3.88 (3 H, s); 3.80 (2H, d, J = 5.9 Hz); 3.46 (2 H, s); 2.23 (3 H, s).

(c) Following a similar procedure to that described in Reference Example 23 (a) above, but using 2- [5 - ({S) - (+) - 2,2-dimethyl- [1,3] dioxolan-4]. (γ Imethoxy) -6-methoxy-1-methyl-1H-indol-3-yl] -1- (trifluoro-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 23 ( c) I, preparing (R) -3- {6-methoxy-1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine-2- yl] -1 H -indol-5-yloxy) propane-1,2-diol as a cream solid. MS: 522 (MH). HPLC (Method A): Rt_T = 8.15 minutes.

Reference Example 25

2- [5- (2-Methoxy-1-methylethoxy) -1-methyl-1H-indol-3-yl] -1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-6] pyridine

A solution of 470 mg of triphenylphosphine and 350 µl of diisopropyldiazodicarboxylate in 15 ml of dry toluene is treated with 150 ml of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine-2. 1-1H-indol-5-ol [Reference Example 14 (a)] and then with 150 µl of 1-methoxy-2-propanol. The mixture was heated to reflux for 5 hours and then cooled and evaporated. The residue was purified by flash chromatography on silica gel eluting with ethyl acetate / pentane (1: 1, v / v) to give 50 mg of the title compound as a clear oil. TLC: Rf_F 0.65 (pentane / ethyl acetate: 1/1). MS: 480 (MH +).

Reference Example 26 40

N-Hydroxy-1-methyl-3- [1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridin-2-yl] -1H-indole-5-carboxamidine

A solution of 2.11 g of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrido [2,3- b] pyridin-2-yl] -1 H -indole-5-carbonitrile [ Reference Example I3 (c)] in 150 ml of ethanol at room temperature was treated with 1.72 g of hydroxylamine hydrochloride and 3.43 g of potassium carbonate. The reaction mixture was heated under reflux for 15 hours under nitrogen and then filtered. The filtrate was evaporated to give 2.8 g of the title compound as a dark green solid. MS: 460 (MH +). HPLC (Method A): Rt_T = 6.19 minutes.

Reference Example 27

2- [1-Methyl-5- (S-methyl- [1,2,4] oxadiazol-3-yl) -1 H -indol-3-yl] -1- (toluene-4- sulfonyl) -1 H -pyrrolo [2,3- b] pyridine

-63EN 301751 B6

To a suspension of 0.7 g of N-hydroxy-1-methyl-3- [trifluoro-4-sulfonyl] -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-5 -carboxamide [Reference Example 26] in 30 ml of toluene was added 0.467 g of acetic anhydride at room temperature under a nitrogen atmosphere. The reaction mixture was heated

4.5 hours under reflux and then filtered. The filtrate was evaporated to give 0.32 g of the title compound as a dark red oil, which was used immediately without further purification in the next reaction.

io Reference example 28

2- (5-Hydroxy-6-methoxy-1-methyl-1H-indol-3-yl) -1- (toluene-4-sulfonyl) -1H-pyrrolo [2,36] pyridine 15 Solution 6 26 g 2- (5-benzyloxy-6-methoxy-1-methyl-1 H -indol-3-yl) -1- (toluene-4-sulfonyl) 1 H -pyrrolo [2,3- b] pyridine [Reference Example 13 (e)] in 500 ml of acetonitrile is treated with 4.38 g of sodium iodide and then with 3.17 g of trimethylsilyl chloride. The mixture was stirred at 40 ° C for 3 hours, then treated with another portion of 4.38 g of sodium iodide and 3.17 ml of trimethylsilyl chloride. After stirring at 40 ° C for 12 hours, the reaction mixture was evaporated. The residue is treated with 200 ml of water and the mixture is extracted three times with 200 ml of ethyl acetate. The combined extracts were dried over magnesium sulfate and then evaporated. The brown foam obtained was triturated with ethyl acetate and diisopropyl ether to give 3.04 g of the title compound as a light brown solid, m.p. 211-214 ° C. HPLC (Method A): R_T = 9.30 minutes.

Reference Example 29

1- {6-Methoxy-1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indol-5-yloxy} ethyl ester cyclobutanecarboxylic acid mg of sodium hydride (60% dispersion in mineral oil) was added to a stirred solution of 400 mg of 2- (5-hydroxy-6-methoxy-1-methyl-1 H -indol-3-yl) under nitrogen at room temperature. (1H-toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 28 (a)] in 20 mL of dry dimethylformamide. The mixture is allowed to stir for 1 hour and then treated with 216 μΐ of ethyl 1-bromocyclobutanecarboxylate and stirring is continued overnight. An additional 43 mg of sodium hydride (60% dispersion in mineral oil) and 216 μΐ of ethyl 1-bromocyclobutanecarboxylate were added and the mixture was heated at 50 ° C for 5 hours. The reaction mixture was cooled and evaporated and the residue partitioned between ethyl acetate and water. The organic phase was washed with water, then brine, dried over magnesium sulphate and evaporated. The yellow residue was purified by flash chromatography on silica gel 40 eluting with ethyl acetate / pentane (2: 3, v / v) to give 266 mg of the title compound as a yellow oil. MS: 576 (MH +). HPLC (Method A): Rt_T - 11.07 minutes

Reference Example 30 [1-Methyl-34-1H-pyrrolo [2,3-b] pyridin-2-yl) -1 H -indol-5-yl] -carbamic acid tert-butyl ester

A solution of 0.3 g of {1- 3- [1 '(toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] 50 1 H -indole-5 tert-butyl ester -yl} carbamic acid [Reference Example 13 (f)] in 15 ml of methanol is treated with 2 ml of 5N potassium hydroxide solution and then the mixture is heated under reflux for 4 hours. The reaction mixture was evaporated and the residue was triturated with water to give 0.2 g of the title compound as a brown solid. MS: 263 (MH &amp; lt; + &amp; gt;). TLC: Rf_F = 0.3 (ethyl acetate).

-64GB 30I75I B6

Reference Example 31

1 H -indole-6-carboxylic acid methyl ester

A solution of 10 g of 17H-indole-6-carboxylic acid in 300 ml of methanol is treated with 0.5 ml of concentrated sulfuric acid and then heated on a steam bath for 10 hours. The solvent was evaporated under reduced pressure and the residue was partitioned between 150 ml of saturated aqueous sodium bicarbonate solution and 150 ml of dichloromethane. The aqueous layer was further extracted twice with 150 mL of dichloromethane. The combined organic extracts were dried over sodium sulfate and then evaporated. The residue was purified by flash chromatography on silica gel eluting with a mixture of ethyl acetate and pentane (7: 3, v / v) to give 7.4 g of the title compound, m.p. 79-81 ° C. MS: 176 (MH +)⁴).

Reference Example 32

Dimethyl- (6-phenyl-5H-pyrrolo [2,3-b] pyrazin-7-ylmethyl) amine

A solution of 0,5 ml of dimethylamine in tetrahydrofuran is treated at 0 ° C with 15 μΐ of glacial acetic acid and then with 75 μΐ of a 40% formaldehyde solution. After stirring at 0 ° C for 10 minutes, this and the mixture was treated with 0.195 g of 6-phenyl-5 H -pyrrolo [2,3- b] pyrazine [Example 2 (c)], and then 3 ml of tetrahydrofuran were added to ensure perfect dissolution. The reaction was allowed to warm to room temperature, then stirred overnight, diluted with 5 mL of ethyl acetate and extracted three times with 5 mL of 1N hydrochloric acid. The combined acid extracts were adjusted to pH 6-7 by addition of 5N potassium hydroxide solution. The resulting light yellow solid was filtered off, then washed with water and dried to give 0.16 g of the title compound as a light yellow solid, m.p. Mp 191-192 ° C.

Reference Example 33

Trimethyl- (6-phenyl-5H-pyrrolo [2,3-b] pyrazin-7-ylmethyl) ammonium iodide

A solution of 5.1 g of dimethyl- (6-phenyl-5 H -pyrrolo [2,3- d] pyrazin-76-ylmethyl) -amine [Reference Example 32] in 100 ml of ethyl acetate is treated with a solution of 40 ml at 0 ° C. methyl iodide in 150 ml of ethanol. The resulting mixture was stirred at 0 ° C for 2 hours. The precipitated solid was filtered, washed with 10 mL of ethyl acetate and then 20 mL of diethyl ether to give 4.5 g of the title compound, m.p. 224-225 ° C.

Reference Example 34 (6-Phenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) acetonitrile

A solution of 0.84 g of potassium cyanide in 20 ml of water is quickly added to a stirred solution of 1.1 g of 45 trimethyl- (6-phenyl-5 H -pyrrolo [2,3- b] pyrazin-7-ylmethyl) ammonium iodide [ Reference example

33] in 20 ml of dimethylformamide and heated at 75 ° C for 6 hours. The cooled solution was diluted with 100 mL of water and the precipitated solid was filtered to give the title compound as a yellow solid, mp 247-248 ° C.

Reference Example 35 (6-Phenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) acetic acid

-65EN 301751 B6

A solution of 70 mg of (6-phenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) acetonitrile [Reference Example 34] in 5 mL of 10M potassium hydroxide solution was heated at 100 ° C for 1.5 h. ^qC. The reaction mixture was allowed to cool, then diluted with 25 mL of water and acidified to pH 1 by addition of concentrated hydrochloric acid. The resulting yellow solid was filtered, then washed with water and dried to give 40 mg of the title compound as a yellow solid, mp 276-277 ° C.

Reference Example 36 1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrido [2,3- a] pyridin-2-yl] -1 H -indole-5-carbaldehyde

To a solution of 500 mg of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-5-carbonitrile [ Reference Example I3 (c)] in 20 mL of tetrahydrofuran was added 12 mL of a 1M solution of diisobutylaluminum hydride in tetrahydrofuran under nitrogen at 0 ° C. The resulting solution was then allowed to warm to room temperature and stirred at this temperature for 2 hours. The reaction mixture was then poured into 20 ml of cold 1N aqueous hydrochloric acid. After 1 hour, the mixture was basified with saturated aqueous sodium hydroxide solution and extracted with 40 mL of ethyl acetate. The organic layer was separated and the aqueous layer was further extracted twice with 20 mL of ethyl acetate. The organic extracts were combined, dried over magnesium sulfate and evaporated in vacuo to give 221 g of the title compound as a white solid, mp 188-189 ° C. MS: 430 (MH +).

Reference Example 37

3- {1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- a] pyridin-2-yl] -1 H -indol-5-yl} acrylic acid ethyl ester

60 ml of Triethyl phosphonoacetate is added to a suspension of 22.4 g of sodium hydride (60% dispersion in mineral in mineral oil) in 3 ml of dimethoxyethane at 0 ° C. The resulting suspension was stirred at room temperature for 1 hour. 120 mg of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-5- was added. of carbaldehyde [Reference Example 36] in 2 ml of dimethoxyethane and stirring was continued for 3 hours. The reaction mixture was then poured into water and extracted twice

30 ml of ethyl acetate. The combined organic extracts were washed with brine and dried over magnesium sulfate and then evaporated in vacuo to give 126 mg of the title compound as a yellow solid, mp 159-162 ° C. MS: 500 (MH +)⁺).

Reference Example 38 (a) 3- {1-Methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole ethyl ester -5-yl} propionic acid

15.7 mg of Palladium (10% on activated carbon) are added to a suspension of 100 ml of 3- {1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrido [2,3- b] ethyl ester. pyridin-2-yl] -1 H -indol-5-yl} acrylic acid [Reference Example 37] in 25 mL of industrial denatured ethanol (methanol). The resulting suspension was stirred under a hydrogen atmosphere for 16 hours. The reaction mixture was then filtered through a pad of diatomaceous earth and the filtrate was evaporated in vacuo. The solid obtained was then triturated with water, filtered to give 92 mg of the title compound as a white solid, m.p. 280-282 ° C. MS: 502 (MH +)⁺).

(b) Following a similar procedure to that described in Example 38 (a) above, but using ethyl 3- [2-dimethylamino-5- (5 H -pyrrolo [2,3- b] pyrazin-6-yl) phenyl Prop-2-enoate (Reference Example

47), ethyl 3- [2-dimethylamino-5- (5H-pyrrolo [2,3-b] pyrazin-6-yl) phenyl] propionate was prepared as an orange gum which was used directly, without further purification in the next reaction. 1 HNMR [(CD₃)₂SO]; δ 8.33 (1H, s); 8.17 (1 H, s); 7.94 (1 H, s); 7.82 (1H, d, J = 8.4Hz); 7.20 (1H, d, J = 8.4Hz); 7.03 (1 H, s); 4.07 (2H, q, J = 7.6Hz); 3.38 (2H, t, J = 7.1Hz); 3.00 (2H, t, J = 7.1Hz); 2.70 (6 H, s); 1.19 (3H, t, J = 7.1Hz).

Reference Example 39

4-Methoxy-2- (5-methoxy-1 H -indol-3-yl} -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine io

Following a similar procedure to Example 18 above but using 2-O-N- tert -butyloxycarbonyl-5-methoxy-1H-indol-3-yl) -4-methoxy-1- (toluene- 4-Sulfonyl) -1H-pyrrolo [2,3-b] pyridine (Reference Example 40), the title compound was prepared as a brown solid. HPLC (Method A): Rt = 8.49 min. MS: 448 (MH +)⁺).

Reference Example 40

2- (1-tert-Butyloxycarbonyl-5-methoxy-1 H -indol-3-yl) -4-methoxy-1- (toluene-4-sulfonyl) 20 1 H -pyrido [2,3- Z&gt;] pyridine

A stirred solution of 0.21 mL of diisopropylamine in 5 mL of tetrahydrofuran was treated with 0.6 mL of a 2.5M solution of n-butyllithium in hexane under nitrogen at -70 ° C for 5 minutes, maintaining the temperature below -65 °. C. After 1 h at -30 ° C the mixture was added to the solution of 280 mg

4-methoxy-1- (1-toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine (Reference Example 41) in 10 mL tetrahydrofuran while maintaining the temperature below -25 ° C. After warming to -15 ° C over 1 hour, 2.8 mL of a 0.5 M solution of zinc chloride in tetrahydrofuran was added while maintaining the temperature below -10 ° C. After 30 minutes, the reaction mixture was treated with 54 mg of tetrakis (triphenylphosphine) palladium [0] and 152 mg of 3-bromo-5-methoxyindole-1-carboxylic acid tert-butyl ester (Reference Example 11 (a)) and stirred for 16 hours at 60 ° C, then treated with 30 mL of water. The mixture was extracted three times with 25 mL of ethyl acetate. The combined organic extracts were washed twice with 15 ml of brine, dried over magnesium sulfate and evaporated. The residue was purified by flash chromatography on silica gel eluting with a mixture of ethyl acetate and pentane (1.Ί, v / v) to give 45 mg of the title compound as a white foam. TLC R_F 0.34 (ethyl acetate / pentane: 1/1). HPLC (method

A): R_T = 9.72 minutes.

Reference Example 41

4-Methoxy-1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-a] pyridine

A mixture of 0.77 g of 4-nitro-1- (1-toluene-4-5-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 9 (b)] and 25 ml of dry dimethylformamide is reacted with 0.17 g of sodium methoxide and stirred at 50 ° C for 16 hours ^QC. An additional 0.085 g of sodium methoxide is then added and stirring is continued

8 hours and then the dimethylformamide was evaporated in vacuo. The residue was dissolved in 100 ml of ethyl acetate and washed with 60 ml of a 1/1 mixture of water and brine. The organic extracts were dried over magnesium sulphate and evaporated. The residue was purified by flash chromatography on silica gel eluting with ethyl acetate to give the title compound as a cream solid. HPLC: Rt_T = 9.73 minutes. @ 1 H NMR₃)₂SO]: δ 8.22 (1H, d, J = 8.2 Hz); 7.96 (2H, d, J = 9.4Hz); 7.71 (1H, d, J = 3.5)

Hz); 7.39 (2H, d, J = 9.4Hz); 6.89 (1H, d, J = 8.2Hz); 6.72 (1H, d, J = 3.5Hz); 3.93 (3 H, s); 2.30 (3 H, s).

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Reference Example 42

4-Phenyl-1 H -pyrrolo [2,3- b] pyridine

A suspension of 1.0 g of 1- (2,6-dimethyl-1,4-dihydropyridin-1-one) -1 H -pyrrolo [2,3- b] pyridinium tetrafluoroborate (Reference Example 43) in 100 ml of tetrahydrofuran (100 ml) is treated with 9.6 ml of a 1M solution of phenylmagnesium bromide in tetrahydrofuran and the mixture was stirred at room temperature for 72 hours and 100 ml of water were added and the tetrahydrofuran was evaporated in vacuo. The residue is extracted three times with 100 ml of chloroform and the combined extracts are dried over sodium sulphate and evaporated. The residue was purified by flash chromatography on silica gel eluting with a mixture of dichloromethane and methanol (99: 1 by volume) to give 83 mg of the title compound as a white solid. MS: 195 (M). 1 H NMR (CDCl 3): δ 8.27 (1H, d, J = 4.1 Hz); 7.78 (2H, d, J = 8.2 Hz); 7.57 (3H, m) 7.48 (1H, t, J = 8.2 Hz); 7.19 (1H, d, J = 3.5 Hz); 6.60 (1H, s).

Reference Example 43

142,6-Dimethyl-1,4-dihydropyridin-4-one-1H-pyrrolo [2,3-d] pyridinium tetrafluoroborate

A mixture of 28.5 g of ethyl O-2,4,6-trimethylsulfonylacetohydroxamate in 160 ml of 70% perchloric acid is stirred at room temperature for 2 hours, then 30 ml of dichloromethane are added. The mixture was poured into 1 liter of ice / ice and extracted rapidly with dichloromethane (3 x 100 ml). The combined organic extracts were washed twice with 100 mL brine and dried over sodium sulfate. The organic extracts were added slowly to a solution of 11.8 g of 1H-pyrrolo [2,3-b] pyridine in 100 ml of dichloromethane. After filtration, 1-amino-1 H -pyrrolo [2,3- b] pyridinium-2,4,6-trimethylphenylsulfonate is obtained, which is used directly in the next step.

A mixture of 16.6 g of 1-amino-1H-pyrrolo [2,3-d] pyridinium-2,4,6-trimethylphenylsulfonate and 8.8 g

3o 3-Acetyl-6-methyl-2H-pyran-2,4 (3H) -dione in 40 ml of concentrated hydrochloric acid was stirred at reflux for 4 hours, then cooled and evaporated in vacuo. The residue was dissolved in 30 ml of ethanol and diluted with 30 ml of a 54% (v / v) solution of tetrafluoroboric acid in diethyl ether, and the mixture was stirred at room temperature for 1 hour. After filtration, 15.0 g of the title compound is obtained as a white solid, m.p. 247-248 ° C.^]@ 1 H NMR₃)₂SO]: δ 9.24 (1H, d, J = 7.5Hz); 9.13 (1H, d, J = 7.5 Hz); 8.08 (1H, d, J = 4.2Hz); 7.93 (1H, t, J = 7.5Hz); 7.22 (1H, d, J = 4.2Hz); 6.83 (2 H, s); 1.96 (6 H, s).

Reference Example 44 (a) 3- [6- (4- tert -Butylphenyl-5) dimethyl ester_Jt -pyrrolo [2,3-a] pyrazin (7-yl) propion-1,1-dicarboxylic acid

To a solution of 1.3 g of dimethyl malonate dissolved in 30 ml of N-methylpyrrolidinone was added 0.39 g of sodium hydride at 0 ° C under nitrogen. After 10 minutes, a solution of 1.12 g of [6- (tert-butylphenyl) -5 H -pyrido [2,3- b] pyrazin-7-yl] ethyltrimethylammonium iodide [Reference Example 45 (a)] was added. The reaction mixture was warmed to room temperature and allowed to stir for 3 hours. The reaction mixture was poured into 200 ml of water and extracted three times with 100 ml of ethyl acetate. The combined organic fractions were dried over magnesium sulphate and evaporated. The residue was purified by flash chromatography on a new chromatography eluting with ethyl acetate / pentane (1: 1, v / v) to give 0.5 g of the title compound as a white solid. 1 H NMR (CDCl 3)?₃): δ 9.48 (1H, s); 8.42 (1H, s); 8.16 (1H, s); 7.64 (2H, d, J = 9.0Hz); 7.58 (2H, d, J = 9.0Hz); 4.45 (1H, t, J = 8.2 Hz); 3.63 (2H, d, J = 8.2 Hz); 3.58 (6 H, s); 1.40 (9 H, s).

(B) Following a similar procedure to that described in Reference Example 44 (a) above, but using [6,441-methyl) ethoxy) phenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl Methyltrimethytammonium iodide [Reference Example 45 (b)], prepared as dimethyl 1-3- (6,4-4 (1-methyl) ethoxyphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] propionone. 1,1-dicarboxylate in the form of a beige solid. MS: 398 (MH +)⁺).

1 H NMR [CDCl 3]: δ 10.1 (broad s, 1H); 8.41 (d, 1H, J = 2.3 Hz); 8.16 (d, 1H, J = 2.3 Hz); 7.62 (d, 2H, J = 8.21Hz); 7.03 (d, 2H, J = 8.20 Hz); 4.64 (m, 1H); 4.45 (t, 1H); 3.78 (d, 1H); 3.60 (s, 6 H); 1.41 (d, 6H, J = 4.41 Hz).

(c) Following a similar procedure to Reference Example 44 (a) above, but using io [6- (4-fluorophenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] methyltrimethylammonium iodide [ Reference Example 45 (c)], dimethyl 3- [6- (4-fluorophenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] propion-1,1-dicarboxylate was prepared in the form of whitish, solids. NMR DMSO 12.2 (s, 1H); 8.4 (d, 1H), 8.2 (d, 1H), 7.8 (d, 2H), 7.4 (d, 2H), 4.4 (t, 1H), 3.7 (s) 6H), 3.6 (d, 2H). MS: 357 (MH &amp; lt; + &amp; gt;).

(d) Following a similar procedure to that described in Reference Example 44 (a) above, but using [6- (4-methoxyphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) methyltrimethylammonium iodide [ Reference Example 45 (d)], dimethyl 3- [6- (4-methoxyphenyl) -5 H -pyrido [2,3- b] pyrazin-7-yl] propion-1,1-dicarboxylate was prepared in the form of an off-white, MS: 369 (MH +);⁺).

Reference Example 45 (a) [6- (4-tert-Butylphenyl-5 H -pyrido [2,3- b] pyrazin-7-yl] methyltrimethylammonium iodide

To a solution of 0.8 g of [644-tert-butylphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl] methyldimethylamine [Reference Example 46 (a)] in 50 ml of tetrahydrofuran is added under nitrogen at 40 ° C. 5 ml of methyl iodide. The reaction mixture was stirred for 4 hours and the solvent was evaporated. Evaporate the residue with 30 mL of toluene and dry under vacuum to give the title compound, which is used immediately in the next reaction without further purification.

(b) Following a similar procedure to that described in Reference Example 45 (a) above, but using 6- (4- (1-methyl) ethoxy) phenyl-5 H -pyrrolo [2,3- b] pyrazine- 7-yl] methyldimethylamine [Reference Example 46 (b)], prepared [6- (4- (1-methyl) ethoxy) phenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] methyltrimethylammonium iodide as a beige solid which is used immediately in the next reaction without further purification.

(c) Following a similar procedure to that described in Reference Example 45 (a) above, but using [6- (4-fluorophenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) methyldimethylamine [ Reference Example 46 (c)], 6- (4-fluorophenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] methyltrimethylammonium 40 iodide was prepared as a yellow solid. * HNMR [(CD)₃)₂SO]: δ 13.0 (s, 1H), 8.5 (d, 1H), 8.4 (d, 1H), 7.7 (d, 2H), 7.6 (d, 2H), 3 1 (d, 2H); 2.9 (s, 9H). MS: 285 (MH +).

(d) Following a similar procedure to that described in Reference Example 45 (a) above, but using [6- (4-methoxyphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) methyl] dimethylamine [Reference Example]

46 (d)], 6- (4-methoxyphenyl) -5 H -pyrrolo [2,3- b] pyrazin-7-yl] methyltrimethylammonium iodide was prepared as an off-white solid. MS: 297 (MH +);⁺).

Reference Example 46 50 (a) [644-tert-Butylphenyl-5 H -pyreolo [2,3- b] pyrazin-7-yl] methyldimethylamine

To 15 ml of a 2M solution of dimethylamine in tetrahydrofuran and 0.45 ml of acetic acid at 0 ° C was added 2.25 ml of a 40% aqueous acetic acid solution. The reaction mixture was stirred for 10 minutes. A solution of 6.9 g of 6- (4- (N-butylphenyl) -56H-pyrrolo [2,3-b] pyrazine [Example 1 (w)] in 400 ml of tetrahydrofuran and the reaction mixture is added. is allowed to stir overnight at room temperature. The reaction mixture was washed with 1N sodium hydroxide solution, brine, dried over magnesium sulfate and evaporated in vacuo. The residue was purified by flash chromatography on silica gel eluting with tetrahydrofuran / methanol (1: 1, v / v) to give 0.8 g of the title compound as a yellow solid. MS: 309 (MH +)⁺HPLC (Method A): Rt_T = 1.93 minutes.

(b) Following a similar procedure to Reference Example 4 (a) above, but using [6- (4- (1-methyl) ethoxyphenyl] -5 H -pyrrolo [2,3- 6] pyrazine [ Example 1 (aa)], 6- (4- (1-methyl) ethoxyphenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) methyldimethylamine was prepared as a beige solid.

(c) Following a similar procedure to that described in Reference Example 46 (a) above, but using 6- (4-fluorophenyl) -5 H -pyrrolo [2,3- b] pyrazine [Example 1 (ae)] , prepare [6- (4-fluorophenyl-5 H -pyrrolo [2,3- b] pyrazin-7-yl) methyldimethylamine as an off-white solid Ή NMR [CD]₃)₂SO]: δ 12.0 (s, 1H), 8.5 (d, 1H), 8.2 (d, 1H), 7.7 (d, 2H), 7.6 (d, 2H), 3 9 (d, 2H); 2.9 (s, 6H). MS: 270 (MH +);⁺).

(d) Following a similar procedure to that described in Reference Example 44 (a) above, but using 6- (4-methoxyphenyl) -5 H -pyrrolo [2,3- b] pyrazine [Example 1 (af)] , prepare [6- (4-methoxy-20-phenyl-5H-pyrrolo [2,3-b] pyrazin-7-yl) -methyldimethylamine as an off-white solid MS: 282 (MH +).

Reference Example 47

Ethyl 3- [2-dimethylamino-5- (5H-pyrrolo [2,3-b] pyrazin-6-yl) -phenyl] -prop-2-enoate

To a solution of 0.1 g of 6- (4-amino-3-bromo-phenyl) -5 H -pyrrolo [2,3- b] pyrazine [Reference Example 48] in 10 mL of dimethylformamide was added 0.25 mL of Schlenk flask ml of ethyl acrylate, 0.05 g of palladium acetate, 0.07 g of tris- (2-methylphenyl) phosphine and 0.8 g of tributylamine. The flask is sealed and heated to 95 ° C for 24 hours and then allowed to stand at room temperature for 24 hours. The reaction was quenched by the addition of 150 mL of water and extracted with 100 mL of ethyl acetate, washed with brine, dried over magnesium sulfate. After evaporation in vacuo, the orange gum obtained was triturated with toluene to give 0.04 g of the title compound as an orange solid. TLC: Rf_F = 0.46 (ethyl acetate). 1 H NMR [CD, ESO]: δ 12.40 (1H, s); 8.38 (1 H, s); 8.34 (1 H, s); 8.02 (1H, d, J = 8.6 Hz); 7.89 (1H, d, J = 16.5Hz); 7.22 (1H, d, J = 8.6Hz); 7.19 (1 H, s); 6.81 (1 H, d, J = 16.5 Hz); 4.23 (2H, q, J = 7.1Hz); 2.78 (6 H, s); 1.30 (3H, t, J = 7.1Hz).

Reference Example 48

6- (3-Bromo-4-dimethylamino) phenyl-5 H -pyrrolo [2,3- b] pyrazine

To a stirred solution of 2.19 g of 4- (dimethylamino) benzonitrile in 15 mL of chloroform was added

45 Pyridine (1.2 ml) and bromine (0.75 ml) in chloroform (15 ml) were added dropwise over 1 min. After the addition was complete, the mixture was stirred for an additional 30 minutes. The reaction mixture was diluted with dichloromethane and washed with water, brine, and evaporated to give 3-bromo-4-dimethylaminobenzonitrile as a yellow oil which was dissolved in 25 mL of tetrahydrofuran. Meanwhile, a stirred solution of 2.7 mL of diisopropylamine in 50 mL of tetrahydrofuran was reacted for 30 minutes at -15 ° C under nitrogen.

7.70 ml of a 2.5M solution of n-butyllithium in hexane, maintaining the temperature below -10 ° C. After minutes, the mixture was treated with 1.21 g of methylpyrazine for 15 minutes and then stirred for 1 hour. A solution of 3-bromo- (dimethylamino) benzonitrile was added over 1 hour at a temperature below -10 ° C. The reaction mixture was allowed to warm to room temperature for 2 hours, then allowed to stand overnight, warmed with 10 mL of water. The tetrahydrofuran was evaporated in vacuo and the resulting mixture was treated with water / ethyl acetate (1/1, v / v) and stirred for 15 minutes. The precipitate obtained is

Filtered and washed thoroughly with a 1/1 (v / v) water / ethyl acetate mixture to give 1.0 g of the title compound as a yellow solid. TLC: Rf_F ~ 0.41 (ethyl acetate).

Reference Example 49

6- (3-tert-Butyldimethylsilyloxy-4-methoxy) phenyl-5 H -pyrrolo [2,3- b] pyrazine

A stirred solution of 3.6 mL of diisopropylamine in 133 mL of tetrahydrofuran was treated with 11.21 mL of a 2.5M solution of n-butyllithium in hexane at -15 ° C under nitrogen and atmosphere while maintaining the temperature below -10 ° C. After stirring for 30 minutes, the mixture is treated with 2.04 g of methylpyrazine for 15 minutes and then treated with a solution of 5.7 g of 3-tert-butyldimethylsilyloxy-4-methoxybenzonitrile (Reference Example 50) in 20 ml of tetrahydrofuran for 1 hour. below -10 ° C. The reaction mixture was allowed to warm to room temperature for 2 hours, then allowed to stand overnight and treated with 10 mL of water. The tetrahydrofuran was evaporated in vacuo and the mixture was partitioned between ethyl acetate and water. The two layers were separated and the aqueous layer was extracted with ethyl acetate. The combined organic layers were dried over sodium sulfate and evaporated. The residue was purified by flash chromatography on silica gel eluting with a mixture of dichloromethane and methanol (32: 1, v / v) to give 1.62 g of the title compound as a brown solid which was used directly in the next step. 1 H NMR [(CD, hSO): δ 8.12 (1H, s); 7.96 (1H, s); 7.44 (1H, d, J = 8.2 Hz); 7.33 (1H s) 6.93 (1H, d, J = 8.2 Hz) 6.84 (1H, s) 3.63 (3H, s) 0.82 (9H, s) 0.01 (6H, s).

Reference Example 50

3- tert -Butyldimethylsilyloxy-4-methoxy) benzonitrile

A solution of 10.0 g of iso-vanillin in 100 ml of dimethylformamide was treated with 9.14 g of hydroxylamine hydrochloride and heated at reflux for 1 hour. The dimethylformamide was evaporated under reduced pressure and partitioned between ethyl acetate and water. The aqueous fraction was extracted with ethyl acetate and the combined organic fractions were dried over sodium sulfate and evaporated in vacuo to give a brown solid which was dissolved in 200 mL of tetrahydrofuran. After reaction with 2.8 g of sodium hydride, the reaction mixture was stirred at room temperature for 1 hour. A solution of 10.9 g of tert-butyldimethylsilyl chloride in 50 ml of tetrahydrofuran was added and the mixture was stirred under nitrogen overnight. The mixture was partitioned between water and diethyl ether. The organic extracts were dried over sodium sulfate, evaporated in vacuo and purified by flash column chromatography on silica gel eluting with pentane / dichloromethane (1: 3, v / v) to give 14.7 g of the title compound as a colorless oil which is used immediately in the next reaction. ^!HNMR [(CD₃)₂SO]: δ 7.30 (1H, d, J = 8.0Hz); 7.11 (1 H, s); 7.01 (1 H, s); 3.70 (3 H, s); 0.81 (9 H, s); 0.01 (6 H, s).

Reference Example 51

4- (1-Methyl) ethoxybenzonitrile

A solution of 1 g of 4-cyanobenzene in 10 ml of hexamethylenetetramine is stirred at room temperature until dissolution. 2.7 ml of 25% aqueous sodium hydroxide solution are added at room temperature over 30 minutes. 5.71 g of 1-methylethyl iodide are added dropwise and the solution is stirred at room temperature for 5 hours and then poured into 30 ml of water. The mixture was extracted three times with 30 ml of ethyl acetate and the combined organic extracts were washed with water, then brine, then dried over magnesium sulfate and evaporated. The residue was purified by flash chromatography on silica gel eluting with ethyl acetate / heptane (1: 1, v / v) to give 1.2 g of the title compound as a white solid. MS: 162 (MH +);⁺). NMR (CD₃)₂SO: δ: 7.58 (d, 2H, J = 8.12 Hz); 6.84 (d, 2 H,

J = 8.12 Hz); 4.62 (m, IH); 1.38 (d, 6H, J = 5.4Hz).

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Reference Example 52 1 H-5-Cyano-1-methyl-2- (methylthio) imidazole

A solution of 0.76 gl / 7-1-methyl-2- (methylthio) imidazole-5-carboxaldehyde [Reference Example]

53 (a)] in 15 ml of dimethylformamide was treated with 0.68 g of hydroxylamine hydrochloride. The mixture was heated at reflux for 4 hours and poured into water. Ethyl acetate was added and the organic layer was washed with water, brine, dried over magnesium sulfate and evaporated to give also 0.47 g of the title compound as a beige solid which was used without further purification. Melting point 115 ° C. MS: 154 (MH &amp; lt; + &amp; gt;).

Reference Example 53 (a) 1-Methyl-2 '(methylthio) imidazole-5-carboxaldehyde

A stirred solution of 8.1 g of 1 / 7-1-methyl-2- (methylthio) imidazol-5-ylmethanol [Reference Example 54] and 28.97 g of manganese dioxide in 160 ml of dichloromethane was heated at reflux for 7 hours. . The reaction mixture was cooled to room temperature and filtered through celite. The dichloromethane was evaporated to give 6.61 g of the title compound as a yellow solid which was used immediately in the next reaction.

(b) Following a similar procedure to that described in Reference Example 53 (a) above, but using 1-methyl-5-phenylpyrazol-3-ylmethanol [Reference Example 66], 1-methyl 1-5-phenylpyrazole- 3-Carbaldehyde, m.p. 106-108 ° C.

Reference Example 54

1H-1-Methyl-2- (methylthio) imidazol-5-yl Imethanol

To a stirred suspension of 5 g of 17H-1-methyl-2- (thio) imidazol-5-yimethanol [Reference Example 55] in 500 ml of methanol is added dropwise 36 ml of 1N sodium hydroxide solution at room temperature.

The suspension was stirred at room temperature for 10 minutes. Methyl iodide is added dropwise and stirring is continued for 12 hours. Methanol was evaporated and the residue was dissolved in dichloromethane and water was added. The organic layer was washed with water, brine, dried over magnesium sulfate and evaporated. The residue was crystallized from ether to give 4.3 g of the title compound as a white solid, m.p. 51 ° C.

Reference Example 55 1 H -1-Methyl-2- (thio) imidazol-5-ylmethanol

A mixture of 12.8 g of dihydroxyacetone dimer, 20.7 g of potassium thiocyanate and 12.4 g of methylamine is added to a solution of 16 ml of acetic acid and 100 ml of butanol. The resulting white mixture was stirred for 70 hours, then suspended in 50 ml of water and filtered. The solid was washed with 60 mL of water, then 60 mL of diethyl ether and dried in vacuo to give 16 g of the title compound as a white solid, m.p. 204 ° C.

Reference Example 56 (a) 3-Cyano-1-methyl-17-indazole

-72GB 30175Ϊ Bo

0.37 g of sodium hydride (60% dispersion in mineral oil) was added to a solution of 1.20 g of 3-cyano-1H-indazole (Reference Example 57) in 30 ml of dimethylformamide under nitrogen at room temperature. The mixture was allowed to stir for 1 hour and then treated with 0.85 ml of methyl iodide and stirring was continued for 1 hour. The reaction mixture was then poured into 15 ml of ice water. The precipitated solid was filtered, then washed with water and dried to give 0.80 g of the title compound as a beige solid, m.p. 73 ° C. @ 1 H NMR .delta. (CD₃)₂SO 3: 7.91 (m, 2H); 7.60 (t, 1H); 7.42 (t, 1H); 4.21 (s, 3H).

(b) Following a similar procedure to that described in Reference Example 56 (a) above, but using

3-Cyano-4-phenyl-1H-pyrrole [Reference Example 58], 3-cyano-1-methyl-4-phenyl-1H-pyrrole was prepared.

Reference Example 57 3-Cyano-1H-indazole

A solution of 0.5 g o-aminobenzyl cyanide in 9.6 ml of 1N aqueous hydrochloric acid solution is treated with 3.85 ml of 1N sodium nitrite solution. After stirring at room temperature for 15 minutes, the reaction mixture was filtered. The solid was recrystallized from ethanol to give 0.4 g of the title compound as a yellow solid, mp 138-140 ° C. * HNMR [(CD₃)₂SO]: δ 7.89 (d, 1H, J = 7.7 Hz); 7.76 (d, 1H, J = 7.9 Hz); 7.48 (t, 1H); 7.41 (t, 1H).

Reference Example 58

3-Cyano-4 &amp; apos;

A solution of 16.53 g of cinnamonitrile and 25 g of (para-toluenesulfonyl) methyl isocyanide in 450 ml of a mixture of ether and dimethylsulfoxide (450 ml, 2: 1) was added dropwise to a stirring suspension of 6.14 g of sodium hydride (60% dispersion in mineral oil). in 50 ml of ether. Exothermic reaction in progress. The reaction mixture was stirred at room temperature for 2 hours, then 500 mL of water was added and the mixture was extracted three times with 250 mL of ether. The combined extracts were washed with brine, then dried over magnesium sulphate and then evaporated. The residue was purified by silica gel filtration chromatography eluting with a mixture of ethyl acetate and pentane (1 L, 1: 4, v / v) and then with a mixture of ethyl acetate and pentane (2, 1.2: 3, v / v). The fractions containing the desired material were evaporated and the residue suspended in 500 ml of pentane with stirring and filtered to give the title compound as a solid, mp 120-122 ° C. MS: 167 (MH +);^-).

Reference Example 59

4- Pyrazines 1-1 -butene

A solution of lithium diisopropylamide [prepared at -35 ° C from 100 mL of 2.5M butyllithium in hexane and 25.3 g of diisopropylamine] was treated at -20 ° C with a solution of 23.5 g of 2-methylpyrazine in 300 mL of dry tetrahydrofuran. The mixture was stirred at -20 ° C for 1 h, then cooled to -78 ° C and treated with a solution of 30.8 g allyl bromide in 300 mL dry tetrahydrofuran. The mixture was allowed to warm to room temperature and stirred at this temperature for 2 hours, then left overnight and treated with 50 mL of saturated aqueous ammonium chloride solution and then with 200 mL of water. The mixture is then extracted twice with 200 ml of ether. The combined extracts were dried over magnesium sulfate and then evaporated. The residue was distilled to give 22 g of the title compound as a colorless oil, b.p. 70 ° C / 0.13 kPa.

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Reference Example 60

2- [5- (pyridin-4-yl) -1-methyl-1 H -indol-3-yl] -1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- a] 5 Pyridine

A mixture of 1.7 g of 2- [5- (1-benzyloxycarbonyl-1,2,5,6-tetrahydropyridin-4-yl) -1-methyl-1H-indol-3-yl] -1- (toluene-4- sulfonyl) -1H-pyrrolo [2,3-Z] pyridine (Reference Example 61), 53 ml of ethanol and 0.35 g of palladium on carbon are stirred for 4 hours in the presence of hydrogen and then allowed to stand overnight at room temperature. room temperature. After another day, 0.18 g of 10% palladium on carbon is added and stirring in the presence of hydrogen is continued for an additional 8 hours. After standing at room temperature for 4 days, the mixture was filtered through Hyflo and the filter bed was washed with ethanol. The combined filtrates are treated with 0.35 g of palladium on carbon and the mixture is stirred in the presence of hydrogen. The mixture was filtered through Hyflo and the filter bed was washed with ethanol. The combined filtrates were evaporated and the residue was purified by flash chromatography on silica gel eluting with ethyl acetate / pentane (4: 1, v / v) to give the title compound as a light brown solid, mp 82-85 ° C.

Reference Example 61

2- (5- (1-benzyloxycarbones 1-1,2,5,6-tetrahydropyridin-4-yl) -1-methyl-1H-indol-3-yl] -1 (toluene-4- sulfonyl) -1 H -pyrrolo [2,3- b] pyridine

A mixture of 2 g of benzyl 143,6-dihydro-4- (4,4,5,5-tetramethyl-1,3,2-dioxaborolin-2-yl) (2 H) pyridine-25 carboxylate (prepared according to the procedure described in P. Eastwood, Tetrahedron Letters, 2000, 41, pages 3705-3708), 0.25 g of dichloro [1,1-bis (diphenylphosphino) ferrocene] palladium complex, and 2.42 g of potassium carbonate are treated with a solution of 1.6 in a nitrogen atmosphere. g trifluoromethanesulfonic acid 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- d] pyridin-2-yl] -1 H -indol-5-yl ester [Reference Example 18 (a)] in 76 ml of dimethylformamide. The mixture is heated at 80 ° C for 4 hours (starting material is still present by TLC), then treated with an additional 0.15 g of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H- trifluoromethanesulfonic acid pyrrolo [2,3-6] pyridin-2-yl] -1 H -indol-5-yl ester, then heated at reflux for 4 hours and left at room temperature overnight. An additional 0.15 g of 1-methyl-3- [1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridin-2-yl] -1 H -indole-5- trifluoromethanesulfonic acid ester (Reference Example 18 (a)) and the mixture was refluxed for a further 4 hours and evaporated. The residue was partitioned between ethyl acetate and water and the aqueous layer was extracted three times with 50 ml of ethyl acetate. The combined organic phases were washed with brine, then dried over magnesium sulphate and evaporated. The residue was purified by flash chromatography on silica gel eluting with a mixture of ethyl acetate and pentane (1: 1, v / v) to give the title compound as a light brown, viscous liquid which was used without further purification.

Reference Example 62 (a) 2-Iodo-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine-4-carbonitrile

A stirred solution of 0.38 ml of diisopropylamine in 7 ml of tetrahydrofuran was treated with 1.6 ml of a 2.5 M solution of n-butyllithium in hexane under nitrogen for 5 minutes while maintaining the temperature below -65 ° C. After stirring for 20 minutes, the mixture was added to a solution of 0.65 g at -70 ° C

Toluene-4-sulfonyl} -1 H -pyrido [2,3- b] pyridine-4-carbonitrile (Reference Example 63) in 15 mL of tetrahydrofuran and stirred at -70 ° C for 45 min. A solution of 0.9 g of iodine in 10 ml of tetrahydrofuran is then added at -70 ° C. The reaction mixture was allowed to warm to room temperature for 1 hour and stirred for 18 hours, then treated with 10 mL of water. The reaction mixture was evaporated in vacuo and the residue was partitioned between 75 mL of ethyl acetate and 50 mL of water. The insoluble material was filtered, washed with ether and dried in vacuo to give 0.45 g of the title compound as a white, solid solid.

-74EN 301751 Boo fabric. The filtrate was separated and the organic phase was washed successively twice with 30 ml of saturated aqueous sodium thiosulfate solution, 30 ml of water and 30 ml of brine, dried over sodium sulfate and evaporated. The residue was triturated with diethyl ether to give 0.25 g of the title compound as a cream solid. TLC Rf = 0.43 (ethyl acetate / heptane 1: 1). MS: 424 (MH &amp; lt; + &amp; gt;).

(b) Following a similar procedure to that described in Reference Example 62 (a) above, but using

4-Chloro-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 9 (c)], was prepared

4-Chloro-2-iodo-1'-toluene-4-sulfonyl-1H-pyrrolo [2,3-a] pyridine as an off-white foam. MS: 432 (M). 1 H NMR (CDCl 3): δ 8.25 (d, 1H), 8.05 (d, 2H), 7.3 (d, 2H), 7.15 (d, 1H), 7.1 (s, 1H), 2.4 io (s, 3H) (c) Following a similar procedure to that described in Reference Example 62 (a) above, but using

5-phenyl-1- (toluene-4-sulfonyl) -1H-pyrrolo [2,3-b] pyridine [Reference Example 67], 2-iodo-5-phenyl-toluene-4-sulfonyl) is prepared. 1 H -pyrrolo [2,3- b] pyridine as a light brown solid.

(d) Following a similar procedure to that described in Reference Example 62 (a) above, but using 4-phenyl-1- (toluene-4-sulfonyl) -1 H -pyrrolo [2,3- b] pyridine [Reference Example 9 (e)], 2-iodo-&lt;-phenyl-1- (toluene-4-sulfonyl) -1 H -pyrido [2,3- a] pyridine was prepared as a white solid, which was was used without further purification₃)₂SO: δ 8.43 (1H, d, J = 4.5Hz); 8.04 (2H, d, J = 8.2Hz); 7.98 (1H, d, J = 4.5Hz); 7.69 (2H, dd, J = 7.2, 1.9 Hz); 7.56 (2H, tt, J = 7.2, 1.9 Hz); 7.44 (2H, d, J = 8.2Hz); 7.42 (1H, d, J = 5.0Hz); 6.92 (1H, d, J = 4.0Hz).

Reference Example 63 l- (Toluene-^and(sulfonyl) -1 H -pyrrolo [2,3- b] pyridine-4-carbonitrile

A mixture of 5.0 g of 1- (2,6-dimethyl-1,4-dihydropyridin-1-one) -1H-pyrrolo [2,3-d] pyridinium tetrafluoroborate (Reference Example 43) and 80 ml of water is treated with 25 ml of saturated aqueous potassium cyanide solution and stirred at room temperature for 48 hours. A solution of 2.9 g of toluene-4-sulfonyl chloride in 100 ml of toluene, a solution of 4.0 g of sodium hydroxide in 10 ml of water and 0.05 g of tetrabutylammonium hydrogen sulfate was added and the mixture was stirred at room temperature for 72 hours. The mixture was filtered through diatomaceous earth and extracted. The aqueous phase is extracted three times with 50 ml of ethyl acetate and the combined organic extracts are washed with 50 ml of water, 50 ml of brine, dried over magnesium sulphate and evaporated in vacuo. The residue was purified by flash chromatography on silica gel eluting with ethyl acetate / heptane (3/7, v / v) to give 1.1 g of the title compound as a white solid, TLC: Rp = 0.60 (ethyl acetate / heptane) 3: 7); 1 HNMR [(CD₃)₂SO]: δ 8.54 (1H, d, J = 4.7Hz); 8.08 (2H, d, J = 8.2Hz); 7.95 (1H, d, J = 3.6Hz); 7.44 (1H, d, J = 4.3Hz); 7.31 (2H, d, J = 8.2Hz); 6.82 (1H, d, J = 3.3Hz); 2.39 (3 H, s); and 0.13 g of 1 H -pyrrolo [2,3- b] pyridine-4-carbonitrile as a white solid, TLC R_F = 0.24 (ethyl acetate / heptane 3: 7); 1 H NMR (CDCl 3): δ 10.19 (1H, s); 8.44 (1H, d, J = 4.6 Hz); 7.59 (1H, m); 7.40 (1H, d, J = 4.6 Hz), 6.78 (1H, m).

Reference Example 64

4-Chloro-1H-pyrrolo [2,3-a] pyridine

10.0 g of N - Pyrrolo [2,3- b] pyridine-N-oxide (Reference Example 65) in 75 ml of phosphorus pentoxide were heated to reflux for 8 hours. Excess phosphorus pentoxide was evaporated and the residue was taken up in water and the solution basified to pH 8-9 and the resulting precipitate was filtered and air-dried to give 10.2 g of the title compound as an off-white solid. MS: 152 (MH +). 1 H NMR (CDCl 3)?₃δ: 8.2 (d, 1H), 7.5 (d, 1H), 7.2 (d, 2H), 6.6 (d, 2H).

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Reference Example 65 1-PynOlo [2,3-b] pyridine-7-oxide

A solution of 224.3 g of 3-chloroperbenzoic acid in 1500 ml of dichloromethane is cooled to 0 ° C. To this solution, 59.1 g of 1 H -pyrrolo [2,3- b] pyridine was added dropwise over 30 minutes. The reaction mixture was stirred at room temperature for 1 hour. The solution was evaporated, diluted with 1500 mL of methanol and treated with 300 mL of 10% potassium carbonate in water. The suspension was filtered and the filtrate was evaporated to dryness. The residue was purified by neutral alumina chromatography eluting with 10% methanol in dichloromethane to give 47.0 g of the title compound as a brown solid.

MS: 135 (M +). 1 H NMR (CDCl 3): δ 13.1 (s, 1H), 8.2 (d, 1H), 7.65 (d, 1H), 7.4 (d, 1H), 7.0 (m, 1H), 6.55 (d, IH).

Reference Example 66 1-Methyl-5-phenylpyrazol-3-ylmethanol

A stirred suspension of 1.28 g of sodium borohydride in 80 ml of dry tetrahydrofuran is treated with 1.88 g of calcium chloride. The mixture is stirred for 1 hour and then treated with a solution of 5.2 g of 1-methyl-5-phenylpyrazol-3-ylcarboxylate (prepared according to the procedure described by Martins et al., J. Heterocycl, Chem. (1999), 36 (1)). , 217-220) in 40 ml of dry tetrahydrofuran. After stirring at room temperature for 3 days and refluxing for 8 hours, the mixture was treated with 50 ml of 1N sodium hydroxide solution. The mixture was stirred at room temperature for 1 hour, then evaporated to remove organic solvents and then extracted three times with 140 ml of dichloromethane. The combined extracts were washed with water, then dried over magnesium sulphate and evaporated to give the title compound as a white solid, m.p. 95-99.^ATC.

Reference Example 67

5-Phenyl 1-1 - (toenene-4-sulfonyl) -1 H -pyrrolo [2,3-] pyridine

A mixture of 1.74 g of phenylboronic acid, 5g of 5-bromo-1- (toluene-4-sulfonyl) -1 H -pyrido [2,3- a] pyridine [Reference Example 9 (d)], 0.49 g of tetrakis (triphenylphosphine) palladium [0] and 133 ml of saturated aqueous sodium bicarbonate solution and 266 ml of dimethylformamide are heated to reflux overnight under nitrogen. The reaction mixture was filtered through Hyflo and evaporated. The residue was partitioned between 50 mL of ethyl acetate and 25 mmol of water and then the aqueous layer was extracted with 25 mL of ethyl acetate. The combined organic phases are washed with 25 ml of water, then with 20 ml of brine, then dried over magnesium sulphate and evaporated. The residue was purified by silica gel chromatography eluting with pentane / ether (1: 1, v / v) to give the title compound as a white solid, mp 151-152 ° C. MS: 335 (MH +).

In vitro test procedures

A. In vitro test procedures for Syk

1. Inhibitory effects of compounds on Syk kinase

Syk kinase inhibitory effects of the compound are determined using a time-resolved fluorescence assay.

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The catalytic domain of Syk kinase (residues A340-N635) is expressed as a fusion protein in yeast cells and purified to a homogeneous phase. Kinase activity is determined in 50 mM Tris-HCl buffer pH 7.0 containing 50 mM NaCl, 5 mM MgCl₂, 5 mM MnCl₂, EnosμΜ adenosine triphosphate and ΙΟμΜ synthetic peptide Biotin4P-alanine)₃-DEEDYEIPP-NH₂. Enzymatic reactions were terminated by the addition of a buffer containing 0.4M KF, 133mM EDTA (ethylenediaminetetraacetic acid), pH 7.0, containing a streptavidin-XL665 conjugate and a monoclonal phosphospecific antibody conjugated to europium cryptate (Eu-K). The properties of the two fluorophores, XL-665 and EU-K, are reported in G. Mathis et al., Anticancer Research, 1997, 17, pages 3011-3014. The specific long-term XL-665 signal, produced only when the synthetic protein is phosphorylated by Syk, is also measured on a Packard Discovery Microplate. Inhibition of Syk activity by the compounds of the present invention is expressed as percent inhibition of control activity achieved in the absence of test compounds. Particular compounds of the present invention inhibit Syk activity at IC 50 in the range of 100 µΜ to 10 nM. Preferred compounds of the present invention inhibit Syk activity at IC_SO in the range of 100 to 10 nM.

2. Antigen-induced degranulation of bosophilic leukemia cells in rats (RBL) measured by release [³H] 5-hydroxytryptamine (serotonin)

2.1. Cell culture, RBL-2H3 cell labeling and assay

Wash 6 x 10 for each 24-well culture plate to be used⁶ of RBL-2H3 cells and resuspended in 15 ml DMEM-10 containing 25 μΐ lmCi / ml [³H] -serotonin (final concentration 0.5 μθ / ιτι1) and 1 μg / ml (15 ml) of anti-DNP IgE (DNP stands for dinitrophenol). 0.5 ml of cell suspension is added to each well of a 24-well microtiter plate. Cells are incubated for 2 days at 37 ° C until confluence is reached. The medium is mixed gently in each well and the cells are then washed with assay buffer. A final volume of 200 ml of assay buffer (+ or - test compound at the appropriate concentration) is then added to the well in triplicate. In each well (except the control wells, ie wells for measuring spontaneous release [³H 1 -serotonin in the absence of cross-linking receptor) is then added 100 ng / ml

DNP (antigen). The cells are then incubated for 30 minutes at 37 ° C and terminated by transferring 100 μΐ of the supernatant from each sample to a liquid scintillation microtiter plate, placed on ice. Subsequently, 200 μΐ of scintillant-40 reagent is added to each well of the microtiter plate and the plates are read on a Topcount Liquid Scintillation Counter.

2.2. Calculation of Results (i) For each group of wells in triplicate, the mean ± SD of the mean is calculated. (Ii) Positive control wells containing antigen (10 ng / ml) but not containing compound were maximal responses.

(iii) Control wells containing neither antigen nor compound had minimal response.

(iv) Using these values ​​as maximum (100%) and minimum (0%) values, the data were normalized to obtain a percentage maximum response.

(v) Dose response curve was plotted and IC values ​​were calculated₅₀ for the respective compounds.

The compounds of the present invention inhibit antigen-induced degranulation of bosophilic leukemia cells in rats (RBL) at EC₅ov in the range of 100 μΜ to 0,01 μΜ.

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B. In vitro DRC Assay Procedure

1. Inhibitory effects of compounds on DRC

The inhibitory effects of the compounds on the KDR-substrate phosphorylation assay were determined using a flashplate assay (96-well microtiter plate, New England Nuclear).

The cytoplasmic domain of the human enzyme was cloned as a fusion with glutathione-S-transferase (GST) into the pFastBac-GST labeled (reading frame) B baculovirus expression vector. Protein 10 was expressed in SF21 cells and purified to 60% homogeneity.

Kinase activity was determined in 20 mM 4-morpholine propane sulfonic acid sodium salt, 10 mM MgCl₂10mM MnCl₂, 1 mM Dithiothreitol, 2.5 mM ethylene glycol-b is (beta-aminoethyl ether)), Ν'-tetraacetic acid, 10 mM β-glycerol phosphate, pH 7.2 containing 10 mM MgCl₂,

100 ALIGN! μΜ Na₃VO4, 1 mM NaF. Add 10 μΐ of compound at 4 ° C to 70μ1 of kinase buffer containing 100ng kinase domain receptor (KDR) enzyme. The reaction is initiated by adding 20 μ 20 of a solution containing 20 µg of substrate (SH2-SH3 PLCy fragment expressed as a GST fusion protein), 2 µC γ ° P [ATP] and 2 µΜ cold ATP. After 1 hour incubation at 37 ° C, stop the reaction by adding 1 volume (100 μΐ) of 200 mM EDTA. The assay buffer is then discarded and the wells are washed three times with 300 μΐ phosphate-buffered saline (PBS). Radioactivity is measured for each well using a Packard Model Top Count NXT.

The background signal is derived from a four-fold measurement of radioactivity in wells containing radioactive ATP and substrate alone in kinase buffer.

Control activity is derived by measuring radioactivity in wells containing a complete test cocktail (γ³³Ρ- [ΑΤΡ], KDR and PLCg substrate) in the absence of test compound.

Inhibition of KDR activity by a compound of the present invention is expressed as a percentage inhibition of the activity exhibited in the absence of the test compound.

To each plate was added quadruplicate SU5614 ΙμΜ (Calbiochem) to control inhibition.

IC 50 values ​​for compounds of the present invention are calculated by plotting a dose response curve. IC values₅o correspond to the concentration of a compound of the present invention that causes 50% inhibition of kinase activity.

Particular compounds of the present invention inhibit KDR activity at IC_5O in range

100 ALIGN! up to 0.3 μΜ.

2. Cellular activity on endothelial cells

2.1 Vascular endothelial growth factor (VEGF) dependent inhibition of human dermal microvascular endothelial cell (HDMEC) proliferation

The anti-KDR activity of the molecules of the present invention is evaluated by absorption [¹⁴C-thymidine to HDMEC (human dermal microvascular endothelial cells) in response to VEGF.

HDMECs (Promocell, passages 5-7) are inoculated on day 1 at 100 μΐ at 5,000 cells per well in 96-well Cytostar plates (Amersham) pre-coated with Attachment Factor (AF, Cascad Biologics) at 37 ° C, v 5% CO₂. On day 2, complete culture medium (basal medium supplemented with 5% fetal bovine serum (FCS) and a growth cocktail

Replace with minimal medium (basal medium supplemented with 5% FCS) and incubate the cells for an additional 24 hours. On day 3, the medium is replaced with 200 μΐ fresh minimal medium supplemented or not with 100 ng / ml VEGF (R&amp;D System) and containing or not containing the compound of the present invention and 0.1 lpCi [¹⁴C] -thymidine. Cells are incubated at 37 ° C in 5% CO for 4 days₂. Absorption [¹⁴C-thymidine is then quantified by subtracting the radioactivity. The tests are performed in triplicate. The final DMSO concentration in the assay is 0.1%. Percent inhibition is calculated as [cpm_{(+ V}EGF) - cpm_{(+ V}EGF + _cpd) Zcpm₍₊vEGF) - cpni (BM5% FCS)]^x100 · The abbreviation cpm stands for counts per minute.

2.2 Effect of molecules on HDMEC growth independent of VEGF:

HDMEC (5,000 cells per well) is inoculated on day 1 in complete medium (CM) in 96-well Cytostar plates (Amersham) pre-coated with binding factor (AF, Cascad Biologics) at 37 ° C, in 5% CO₂. The complete medium is then removed and the cells are incubated in 200 μΐ of the complete medium containing the molecules of the present invention and [¹⁴C 1 -thymidine (0.1 pCi). Absorption [^l4C-thymidine is quantified using a Wallac betaplate after 3 days of incubation. Percent inhibition is calculated using the following formula: [cpm_(cm) - cpm _(Cm + _cpd) / cpmíCMjx100.

C. Aurora2 in vitro assay

1. Inhibitory effects of compounds on Aurora2 kinase

The inhibitory effects of compounds on Aurora2 kinase were determined using a nickel-chelate radioactive flashplate assay.

The N-terminal His-tagged full length recombinant Aurora2 is expressed in E. coli and purified to near homogeneity.

N-terminal His-labeled NuMA (nuclear protein that associates with the smithotic apparatus) The C-terminal fragment (Q1687-H2101) is expressed in E.coli, purified by nickel chelate chromatography, and used as a substrate in the Aurora2 kinase assay. To determine kinase activity, the NuMA substrate is freshly equilibrated in kinase buffer (50 mM Tris-HCl, pH 7.5, 50 mM NaCl, 10 mM MgCl₂) supplemented with 10% (v / v) glycerol and 0.05% (w / v) NP40 by Pharmacia PD10 column chromatography.

Aurora 2 kinase activity is measured on a nickel-chelate flashplate (New England Nuclear, model SMP107). Each well contains 100 μΐ of the following solution: 0,02 μΜ Aurora2; 0.5 μΜ of NuMAsubstrate; 1 μΜ ATP supplemented with 0.5 pCi [y-³³P] -ATP. The solutions were incubated for 30 minutes at room temperature

3 Low: 14 ° C. The assay buffer is then discarded and the wells are washed twice with 300 μΐ kinase buffer. Radioactivity is measured in each well using a Packard Model Top Count NXT.

The background signal is derived by measuring the radioactivity in duplicate in wells containing radioactive ATP alone in kinase buffer treated in the same way as other samples. Control activity is derived from the measurement of radioactivity in duplicate in wells containing the complete test cocktail (ATP, Aurora ® and NuMA substrate) in the absence of test compound.

Inhibition of Aurora2 activity by a compound of the present invention is expressed as percent inhibition of control activity reported in the absence of test compound. Staurosporine is added to each plate as an inhibition control.

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IC 50 values ​​for compounds of the present invention are calculated by plotting a dose response curve. IC values₅₀ corresponds to the concentration of a compound of the present invention that causes 50% inhibition of kinase activity.

Specific compounds of the present invention inhibit Aurpra2 activity at IC_5O in the range of 100 to 0.3 μΜ.

C. In vitro FAK Assay Procedure

1. Inhibitory effects of compounds on FAK

The inhibitory effects of compounds on FAK kinase - an autophosphorylation assay - were determined using a time-resolved fluorescence assay.

The full-length human enzyme cDNA was cloned into the pFastBac HTc baculovirus expression vector. The protein was expressed and purified to about 70% homogeneity.

Kinase activity was determined in 50 mM Hepes pH 7.2 containing 10 mM MgCl₂, 100 μΜ Na₃VO₄, 15 μΜ of adenosine triphosphate. The enzyme reaction is terminated by the addition of Hepes buffer pH 7.0, containing 20 or 0.4 of KF, 133 mM EDTA, BSA (bovine serum albumin) 0.1% containing anti-HHis antibody labeled XL665 (FAK is His-labeled) and monoclonal a tyrosine phosphospecific antibody conjugated to europium cryptate (Eu-K). The properties of both fluorophores, XL-665 and EU-K, are reported in G. Mathis et al., Anticancer Reseach, 197, 17, pp. 3011-3014. The specific long-term XL-665 signal, produced only when FAK enzyme is phosphorylated 25, is measured on a Packard Discovery Microplate analyzer. Inhibition of FAK activity by the compounds of the present invention is expressed as percent inhibition of control activity exhibited in the absence of test compound.

2. SK-Mel-28 human melanoma cell proliferation / viability measured by absorption [¹⁴C] thymidine

2.1 Cell culture, SK-Mel-28 labeling and assay

SK-Mel-28 are inoculated on day 1 at 5,000 cells per well in 96-well Cytostar plates (Amersham) at 37 ° C, 5% CO₂. On day 2, the medium is replaced with fresh Eagle's minimum base medium (MEM) supplemented with 10% FCS, 1% non-essential amino acids, 1% sodium pyruvate and containing 0.1 pCi [^I4CJ-thymidine plus increasing compound concentration in 200 μί final volume. Cells are incubated at 37 ° C, 5% CO₂ 48 hours. Absorption [¹⁴C-thymidine is quantified by subtracting radioactivity 48 hours after the start of treatment. Assays are performed in wells in triplicate.

2.2. Calculation of results (i) Calculate the mean ± standard deviation of each set of three wells.

(ii) Positive control wells containing cells but containing no test compound had maximal response.

(iii) Minimal response was in control wells containing no cells and no compound.

(iv) Using these values ​​as maximum (100%) and minimum (0%) values, the data is normalized to yield a percentage of maximum response.

(v) Plot the dose response curve and calculate IC values_5{) (drug concentration that causes a 50% increase in absorption [^l4(1-thymidine) for compounds.

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3. Migration of SK-Mel-28 human melanoma cells on a fibronectin matrix

3.1. Cell culture and assay

SK-Mel-28 (250,000 cells) was pre-treated with increasing concentrations of compounds for minutes at 37 ° C, 5% CO₂. It is then placed in the presence of the compound on the upper side of 12μιη

12-well Wellden Chemotaxis Boyden Chambers (Becton Dickinson) and left for 24 hours at 37 ° C, 5% CO₂, migrate to the lower chamber containing fibronectin (10 µg / ml) as a chemo-tractant in basal RPMI culture medium. The cells are then fixed and stained in a Dif-Quick (DiffQuick Fix, Solutions I and II, Dade Boehring) and cells are removed from the top of the chamber. The color is solubilized from the underside of the adherent cells and the cell migration is quantified by measuring the optical density. The test is performed in wells in duplicate.

3.2. Calculation of results (i) Calculate the mean ± standard deviation of each set of two wells.

(ii) Maximum response was positive control wells containing cells but containing no test compound and allowed migration to fibronectin.

(iii) Minimal responses were given to control wells containing no cells but no compound and allowed migration to basal culture medium w / o chemoattractant.

(iv) Using these values ​​as maximum (100%) and minimum (0%) values, the data are normalized to give a percentage of the maximum response.

(v) Plot the dose response curve and calculate IC values₅(drug concentration that causes a 50% reduction in cell migration) for compounds.

Particular compounds of the present invention inhibit FAK activity at IC₅₀ in range

100 ALIGN! up to 0.3 μΜ.

In vitro test procedures

1. Inhibition of antigen-induced airway inflammation - single and multiple daily oral studies

The compounds of the present invention are tested in Brown Norway rats. The models 40 used in these in vivo studies mimic the corresponding pathological characteristics of allergic airway disease. These studies have shown that the compounds of the present invention inhibit the accumulation of inflammatory cells in the allergic airways 24 hours after antigen inhalation. Results found at the end of the study showed the incidence of inflammatory leukocytes in bronchoalveolar lavage fluid (BALF), lung fluid, and tissue, as analyzed by histopathological analysis.

Procedure for sensitization and antigenic stimulation

Brown Norway rats were sensitized on days 0, 12, and 21 with ovalbumin (100 µg, ip) administered 50 with aluminum hydroxide (100 mg, ip). On day 30, rats were exposed to 1% ovalbumin aerosol for 30 minutes. The animals are then returned to the cages.

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Dosing procedure

The test drug is administered orally 1 hour before initiation of stimulation by allergen inhalation. Four hours after the end of stimulation by antigen inhalation, a second dose of drug is orally administered. Doses of the compound are administered in divided doses of 3 to 100 mg / kg.

In separate studies, the drug is administered twice daily 4 days prior to antigen inhalation. The final dose of the compound in these studies was also administered 4 hours after antigen challenge.

io Procedure for obtaining bronchoalveolar lavage fluid (BAL)

Twenty-four hours after stimulation by antigen inhalation, cells are recovered from the airway lumen by bronchoalveolar lavage of sacrificed animals and the lungs are washed three times with 5 ml aliquots of RPMI / FCS. The wash fluid is left in the lungs for 30 seconds and then carefully removed. Three samples are pooled and total and differential white blood cell counts are measured in BAL samples. The ARGOS system was used to determine the total cell count, and light microscopy of WrightGiems stained cytocentrifuged preparations was used to determine the differential cell count.

Histopathological analysis of lungs

Immediately after BAL, the lungs are insufflated with 10% neutral buffered formalin (NBF) under pressure (30 cm water column). The lungs were removed and placed in 10% NBF containers. After fixation in 10% NBF for at least 24 hours, the lungs are processed in an alcohol row and embedded in wax. Longitudinal blocks are formed from the lung and a 2 µm longitudinal incision is made at the level of the main bronchus from each animal. Sections are then stained with hematoxylin and eosin. Pathological evaluation of sections and classification of bronchiolar epithelium and submucosa is performed.

Lung digestion procedure

In some studies, the lungs themselves were digested (digested) to obtain tissue-localized inflammatory cells. In these studies, cells are obtained by washing the left lung with RPMI / FCS to remove blood from the cells immediately after BAL. In these studies, the right side of the lung was insufficient and fixed with buffered formalin for histopathological analysis. The lungs to be digested are standardized in animals by removing 300mg of lung tissue and then digesting with collagenase. This will release the cells from the lung tissue and allow them to be recovered. The cells thus obtained are subjected to total and differential cell counts.

Results:

(i) After antigen inhalation, there was a significant increase in the number of eosinophils and neutrophils in the untreated groups. This was demonstrated by a significant increase in BAL and eosinophil and neutrophil counts after cleavage, and also on the basis of histopathological scores.

(ii) No macrophage / monocyte cell counts were observed in BAL when challenged with antigen or with any drug treatment.

(iii) The compounds are capable of significantly inhibiting neutrophil and eosinophil infiltration 24 hours after antigen challenge as compared to the untreated control group, as demonstrated by all three methods above. The effective dose was in the range of 3 to 100 mg / kg po.

(iv) In a multiple dose study per day, there was a quantitatively similar inhibition of cellular influx as in the single dose study.

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These results indicate that the compounds of the present invention have anti-inflammatory activity when administered to rats prophylactically in an antigen-induced leukocyte infiltration model.

2. Inhibition of antigen-induced airway inflammation - once daily ip study.

Sensitization and stimulation procedure

Brown Noraway rats were sensitized on days 0.12 and 21 with ovalbumin (100 µg, ip) administered 10o with aluminum hydroxide (100 mg, ip). On day 30, rats were exposed to 1% ovalbumin aerosol for 30 minutes. The animals are then returned to the cages.

Dosing procedure

The test drug is administered four times intraperitoneally instead of po. The dosing regimen was 30 minutes before stimulation and 2.4 and 8 hours after stimulation by allergen inhalation.

Procedure for obtaining fluid from bronchoalveolar lavage (BAL)

Twenty-four hours after stimulation by antigen inhalation, cells are recovered from the airway lumen by bronchoalveolar lavage of sacrificed animals and the lungs are washed three times with 5 ml aliquots of RPMI / FCS. The wash fluid is left in the lungs for 30 seconds and then carefully removed. Three samples are pooled and total and differential white blood cell counts are measured in BAL samples. The ARGOS system was used to determine total cell counts, and light microscopy of cytocentrifuged preparations after Wright-Giemsa staining was used to ensure differential cell counts.

Histopathological analysis of lungs

Immediately after BAL, the lungs are insufflated with 10% neutral buffered formalin (NBF) under pressure (30 cm of water). The lungs were removed and placed in 10% NBF containers. After fixation in 10% NBF for at least 24 hours, the lungs are processed in an alcohol series and cast into wax. Prepare longitudinal blocks and prepare a 2μιη longitudinal section at the main bronchial level for each animal. Sections are then stained with hematoxylin and eosin. Pathological evaluation of sections and classification of bronchiolar epithelium and submucosa is performed.

Lung digestion procedure

In some studies, the lungs themselves were cleaved to obtain inflammatory cells localized to the tissues. In these studies, cells are obtained by washing the left lung with RPMI / FCS to remove blood from the cells immediately after BAL. In these studies, the right side of the lung was insufficient and fixed with buffered formalin for histopathological analysis. The lungs to be digested are standardized in animals by removing 300 mg of lung tissue and collagenase digestion. This will release the cells in the lung tissue and allow them to be recovered. The cells obtained are subjected to total and differential cell counts.

Results:

(i) After antigen inhalation, there was a significant increase in the number of eosinophils and neutrophils in the untreated groups. This was demonstrated by a significant increase in BAL and eosinophil and neutrophil counts in and after BAL digestion as well as histopathological scores.

(ii) The compounds of the invention are capable of significantly inhibiting neutrophil and eosinophil infiltration 24 hours after antigen challenge compared to the untreated control group, as demonstrated by all three methods above. The effective dose was in the range of 3 to 100 mg / kg po.

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These results indicate that the compounds of the present invention have anti-inflammatory activity when administered pro-phylactically in a rat model of antigen-induced leukocyte infiltration either orally or intraperitoneally.

3. Inhibition of acute antigen-induced bronchoconstriction in allergic rats Sensitization and stimulation procedure Brown Norway rats are sensitized on days 0, 12 and 21 with ovalbumin (100 µg, ip) administered with aluminum hydroxide (100 mg, ip). On the study day, rats are surgically prepared to measure pulmonary mechanics and ventilated mechanically. After a five minute equilibration period, the animals receive an ovalbumin bolus (1 mg per rat). The animals are then monitored for 15 minutes and the maximum changes in baseline resistance are recorded in response to antigen stimulation.

Dosing procedure

The test drug is administered either after or ip 24 and 2 hours before the iv injection of ovalbumin. The amount of compound administered in this study was 10 to 100 mg / kg po.

Results

Following antigen challenge, non-treated and budesonide control animals showed a significant increase in airway resistance relative to baseline. In contrast, the compounds of the present invention significantly inhibited antigen-induced bronchoconstriction.

The results indicate that the compounds of the present invention inhibit antigen-induced bronchoconstriction.

4. Inhibition of lung edema in rats induced by Sephadex and cytokine gene expression in allergic rats

Sephadex administration procedure

Male Sprague-Dawley rats (400 g) are dosed with vehicle (saline) or Sephadex (5 mg / kg) at a dose volume of 1 mL / kg under halothane anesthesia (4% in oxygen for 3 minutes).

Administration procedure

The drug is administered 1 hour before and 5 hours after Sephadexu at a dose volume of 1 mg / kg.

Twenty-four hours after the administration of Sephadex, animals are sacrificed with Euthatal (1 ml / kg ip), the heart and lungs removed en bloc. The increase in fresh weight was used as an index of edema. Fresh weight is determined and corrected for 100 g of initial body weight.

RT-PCR procedure (measurement of cytokine gene expression)

RNA is isolated from lung tissue using guanidium thiocyanate-phenol-chloroform extraction technique. RNA was reverse transcribed to cDNA using AMV reverse transcriptase. The cDNAs for IL-5, IL-A eotaxin and GAPDH (control gene) were amplified by PCR using an oligonucleotide sequence synthesized (Gibco) from published sequences.

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The PCR reagents are overlaid with mineral oil and amplification is performed through 25 to 35 cycles of denaturation at 95 ° C for 1 minute, annealing of the primers at 55 to 65 ° C for 1 minute and extension at 72 ° C. ^QC for 7 minutes. Ethidium bromide-stained PCR products were electrophoresed in 2% agarose gels to visualize cDNA bands.

Bands of each target fragment are visualized by ultraviolet translucination and photographed. Photos are scanned on a densitometer and the integrated optical densities (OD x mm) of each band are calculated using imaging analysis software (Imagemaster, Pharmacia). For each animal, the amount of each cytokine PCR product is normalized to the amount of GAPDH PCR product.

Results (i) Dripping of Sephadex alone produces a significant edema of 32%.

(ii) The compounds of the present invention inhibit dose-dependent edema at doses of 10, 30 and 100 mg / kg.

(iii) Sephadex caused an increase in the expression of Th-2 cytokines IL-4 and IL-5 together with CC chemokine eotaxin in the lung 24 hours after stimulation. There was a tendency to increase expression of IL-5 and eotaxin mRNA.

(iv) L-4 mRNA expression was inhibited by the compounds of the present invention in a dose-dependent manner.

The compounds of the present invention inhibit Sephadex-induced pulmonary edema in rats, which is associated with a reduction in IL-4 induction by Sephadex.

5. Inhibition of antigen-induced histamine release in allergic Brown-Norway rats

Sensitization and stimulation procedure

Brown-Norway rats were sensitized on days 0, 12 and 21 with ovalbumin (100 µg, ip) administered with aluminum hydroxide (100 mg, ip). On the study day, rats are surgically prepared for antigen infusion. After 5 minutes of equilibration, the animals receive a bolus of ovalbumin (1 mg per rat). Blood samples are taken 2 minutes after ovalbumin challenge and plasma histamine levels are measured using a histamine ELISA assay.

Dosing procedure

The test drug is administered ip 30 minutes before ovalbumin stimulation. Only one concentration of 30 mg / kg ip was used in this study

Results

After antigen challenge, Syk kinase inhibitors significantly inhibited antigen-induced histamine release compared to the vehicle-only group.

These results indicate that the compounds of the present invention inhibit antigen-induced histamine release.

6. Inhibition of ED-1 + alveolar macrophages in rat lung tissue

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Sensitization and stimulation procedure

Brown-Norway rats were sensitized on days 0, 12 and 21 with ovalbumin (100 µg, ip) administered with aluminum hydroxide (100 mg, ip). On day 30, rats were exposed to 1% ovalbumin aerosol per

30 minutes. The animals are then returned to the cages.

Dosing procedure

The test drug is administered either after or ip 24 and 2 hours before iv injection of ovalbumin bolus. The amount of compound administered in this study is between 10 and 100 mg / kg po.

EDI quantification procedure

Alveolar macrophages are quantified after immunostaining with ED-1 on paraffin-fixed lung tissue sections.

Results (i) Ovalbumin stimulation resulted in a ten-fold increase in the number of ED1 + macrophages in alveo20 lyes.

(ii) Syk kinase inhibition greatly reduced the increase in the number of albumin induced alveolar macrophages in a dose-dependent manner.

Oral administration of the compounds of the invention will provide a dose-dependent reduction of ED-1 + alveolar macrophages upon ovalbumin stimulation,

7. Inhibition of antigen-induced airway neutrophilia in kiys Brown-Norway

Sensitization and stimulation procedure

Brown-Norway rats were sensitized on days 0, 12 and 21 with ovalbumin (100 µg, ip) administered with aluminum hydroxide (100 mg, i.p.). On day 30, rats are exposed to 1% ovalbumin aerosol for 30 minutes. The animals are then returned to the cages.

Dosing procedure

Rats are dosed orally one hour prior to antigen challenge. The amount of compound administered in this study is between 10 and 100 mg / kg po.

Cell analysis procedure

Four hours after stimulation, cells are recovered from the airway lumen by bronchoalveolar lavage (RPMI / FCS as described above). Immediately after rinsing, the lungs are flushed

RPMI / FCS to remove accumulated blood cells. 300 mg of tissue is collected and cells are harvested by enzymatic digestion (collagenase). Differential cell counts were performed by light microscopy of the preparations after centrifugation and staining with Wright-Giemsa.

Results (i) Four hours after antigen challenge, a significant increase in neutrophil counts was observed in both BAL and lung tissue.

(ii) Compounds of the present invention significantly suppressed the ovalbumin-induced increase in neutrophil count in BAL but not in lung tissue.