Bicyclic heterocycles as fgfr4 inhibitors

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

BICYCLIC HETEROCYCLES AS FGFR4 INHIBITORS

FIELD OF THE INVENTION

The present disclosure relates to bicyclic heterocycles, and pharmaceutical compositions of the same, that are inhibitors of the enzyme FGFR4 and are useful in the treatment of FGFR4-associated diseases such as cancer.

BACKGROUND OF INVENTION

The Fibroblast Growth Factor Receptors (FGFR) are receptor tyrosine kinases that bind to fibroblast growth factor (FGF) ligands. There are four FGFR proteins (FGFR1-4) that are capable of binding ligands and are involved in the regulation of many physiological processes including tissue development, angiogenesis, wound healing, and metabolic regulation. Upon ligand binding, the receptors undergo dimerization and phosphorylation leading to stimulation of die protein kinase activity and recruitment of many intracellular docking proteins. These interactions facilitate the activation of an array of intracellular signaling pathways including Ras-MAPK, AKT-PI3K, and phospholipase C that are important for cellular growth, proliferation and survival (Reviewed in Eswarakumar et al. Cytokine & Growth Factor Reviews, 2005). Aberrant activation of this pathway either through overexpression of FGF ligands or FGFR or activating mutations in the FGFRs can lead to tumor development, progression, and resistance to conventional cancer therapies. In human cancer, genetic alterations including gene amplification, chromosomal translocations and somatic mutations that lead to ligand-independent receptor activation have been described. Large scale DNA sequencing of thousands of tumor samples has revealed that components of the FGFR pathway are among the most frequently mutated in human cancer. Many of these activating mutations are identical to germline mutations that lead to skeletal dysplasia syndromes. Mechanisms that lead to aberrant ligand-dependent signaling in human disease include overexpression of FGFs and changes in FGFR splicing that lead to receptors with more promiscuous ligand binding abilities (Reviewed in Knights and Cook Pharmacology & Therapeutics, 2010; Turner and Ghose, Nature Reviews Cancer, 2010). Therefore, development of inhibitors targeting FGFR may be useful in the clinical treatment of diseases that have elevated FGF or FGFR activity.

The cancer types in which FGF/FGFRs are implicated include, but are not limited to: carcinomas (e.g., bladder, breast, cervical, colorectal, endometrial, gastric, head and neck,

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770 kidney, liver, lung, ovarian, prostate); hematopoietic malignancies (eg., multiple myeloma, chronic lymphocytic lymphoma, adult T cell leukemia, acute myelogenous leukemia, nonHodgkin lymphoma, myeloproliferative neoplasms, and Waldenstrom's Macroglubulinemia); and other neoplasms (e.g., glioblastoma, melanoma, and rhabdosarcoma). In addition to a role in oncogenic neoplasms, FGFR activation has also been implicated in skeletal and chondrocyte disorders including, but not limited to, achrondroplasia and craniosynostosis syndromes.

The FGFR4-FGF19 signaling axis, specifically, has been implicated in die pathogenesis of a number of cancers including hepatocellular carcinoma (Heinzle et al., Cur. Pharm. Des. 2014,20:2881). Ectopic expression of FGF19 in transgenic mice was shown to lead to tumor formation in the liver and a neutralizing antibody to FGF19 was found to inhibit tumor growth in mice. In addition, overexpression of FGFR4 has been observed in a multiple tumor types including hepatocellular carcinoma, colorectal, breast, pancreatic, prostate, lung, and thyroid cancers. Furthermore, activating mutations in FGFR4 have been reported in rhabdomyosarcoma (Taylor et al. JCI 2009,119:3395). Targeting FGFR4 with selective small molecule inhibitors may therefore prove beneficial in the treatment of certain cancers.

There is a continuing need for die development of new drugs for ihe treatment of cancer and other diseases, and the FGFR4 inhibitors described herein help address this need.

SUMMARY OF INVENTION

The present disclosure is directed to inhibitors of FGFR4 having Formula (I):

<img file="CA2976788C_D0001.tif" />

or pharmaceutically acceptable salts thereof, wherein constituent variables are defined herein.

84036542

The present disclosure is further directed to a compound of Formula (I):

<img file="CA2976788C_D0002.tif" />

(I) or a pharmaceutically acceptable salt thereof, wherein:

X¹ is CR¹⁰Rⁿ or NR⁷;

XisNorCR⁶;

R¹ is Ci-3 alkyl;

R² is halo;

R³isH;

R⁴ is Ci-3 alkyl;

R⁵ is halo;

R⁶is selected from H, halo, CN, OR®⁴, SR®⁴, CfOjNR^R⁴⁴, œ/OjNR^R⁴⁴, NR^R⁴⁴, NR^CiOjR⁸⁴, NR^CiOjOR®⁴, NR^OjNR^R⁴⁴, NR^C^R⁵⁴, NR^SCO^⁶⁴, NR^SfO^NR^R⁴⁴, S(O)R^M, SfOjNR^R⁴⁴, S(O)2R^b4, S(O)2NR^c4R^d4, Cm alkyl, C2-6 alkenyl, C2-6 alkynyl, Ci^ haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, 0 and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁶ are each optionally substituted with 1,2, or 3 substituents independently selected from R^,0A;

R⁷ is selected from H, CfOjNR^R⁴⁴, S(O)R^M, SfOjNR^R⁴⁴, S(O)2R^M, S(O)2NR^c4R⁴⁴, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, Cw haloalkyl, phenyl, C 3-6 cycloalkyl, a 5-6 membered heteroaryl having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said 0¼ alkyl, C2-6 alkenyl, C2-6 alkynyl, phenyl, cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁷ are each optionally substituted with 1,2, or 3 substituents independently selected from R^10A;

2a

Date Reçue/Date Received 2023-03-30

84036542

Lis CH₂;

R⁸ is H;

R¹⁰ and R¹¹ are each independently selected from H, Cm alkyl, C2+ alkenyl, C₂-6 alkynyl, Ci-6 haloalkyl, Ce-io aryl, C3-10 cycloalkyl, a 5-10 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-10 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Ci^ alkyl, C₂-e alkenyl, C2-6 alkynyl, Ce-io aryl, C3-10 cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl groups of R¹⁰ and Rⁿ are each optionally substituted with 1,2,3, or 4 R^10A;

R^10A, at each occurrence, is independently selected from halo, CN, NO2, OR®⁴, SR®⁴, C(O)R^m, C(O)NR®⁴R^d4, CiOjOR®⁴, OC(O)R^M, OQOjNR^R⁰⁴, C(=NR^e4)NR^c4R^d4, NR^c4C(=NR^c4)NR^c4R^d4, NR^R⁰⁴, NR^o4C(O)R^b4, NR^CiOjOR®⁴, NR^o4C(O)NR^o4R⁴⁴, NR^OIR**, NR°*S(O)2R^M, NR^SCOhNR^R⁰⁴, S(O)R^M, S(O)NR^c4R⁴⁴,8(Ο)₂Κ^Μ, SCO^NR^R⁴⁴, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, Cm haloalkyl, phenyl, C3+cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said C1-6 alkyl, C2+ alkenyl, C2+ alkynyl, phenyl, C3+ cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group of R^wa are each optionally substituted with 1,2, or 3 substituents independently selected fromR¹⁹;

R®⁴, R^m, R®⁴, and R⁴⁴, at each occurrence, are independently selected from H, Cm alkyl, C2-4 alkenyl, C2-4 alkynyl, C1-4 haloalkyl, phenyl, C3+cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cm» alkyl, C2-4 alkenyl, C2-4 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group of R®⁴, R^M, R®⁴, and R⁴⁴ are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

alternatively, R®⁴ and R⁴⁴ together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents independently selected from R¹⁹;

R®⁴, at each occurrence, is H or Cm alkyl;

alternatively, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form

2b

Date Reçue/Date Received 2023-03-30

84036542 a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group or a 4-, 5-, 6-, 7-, 8-, 9-, or 10-membered heterocycloalkyl group; wherein said 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group and 4-, 5-, 6-, 7-, 8-, 9-, or 10-membered heterocycloalkyl group are each optionally substituted with 1,2,3 or4R^10A;

R¹² is H;

R¹⁹, at each occurrence, is independently selected from halo, CN, NO2, OR®⁹, SR®⁹, C(O)R^b9, CCOjNR^R⁴⁹, C(O)OR^a9, OC(O)R^b9, OCiOjNR^R⁴⁹, NR^R⁴⁹, NR^CCOjR⁵⁹, NR^CCOjOR®⁹, NR^CiOjNR^R⁴⁹, NR^O^, NR^c9S(O)2R^b9, NR^c9S(O)2NR^c9R⁴⁹, S(O)R^b9, SCOjNR^R⁴⁹, S(O)2R^b9, SCOjiNR^R⁴⁹, Cm alkyl, C₂-₄ alkenyl, C₂-₄ alkynyl, and Cm haloalkyl;

R®⁹, R⁰⁹, and R⁴⁹, at each occurrence, are independently selected from H and Cm alkyl;

and

R^b9, at each occurrence, is independently Cm alkyl.

2c

Date Reçue/Date Received 2023-03-30

C* 02976788 2017-08-15

WO 2016/134314 PCT/IIS2016/018770

The present disclosure is further directed to pharmaceutical compositions comprising a compound of Formula (I), or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable carrier.

The present disclosure is further directed to methods of inhibiting an FGFR4 enzyme comprising contacting the enzyme with a compound of Formula (I), or a pharmaceutically acceptable salt thereof.

The present disclosure is further directed to a method of treating a disease associated with abnormal activity or expression of an FGFR4 enzyme, comprising administering a compound of Formula (I), or a pharmaceutically acceptable salt thereof, to a patient in need thereof.

The present disclosure is further directed to compounds of Formula (I) for use in treating a disease associated with abnormal activity or expression of an FGFR4 enzyme.

The present disclosure is further directed to a method for treating a disorder mediated by an FGFR4 enzyme, or a mutant thereof, in a patient in need thereof, comprising the step of administering to said patient a compound according to the present invention or pharmaceutically acceptable composition thereof.

The present disclosure is further directed to a method for treating a disorder mediated by an FGFR4 enzyme, or a mutant thereof, in a patient in need thereof, comprising the step of administering to the patient a compound according to the present invention or a pharmaceutically acceptable salt thereof, or a composition comprising a compound according to the present invention, in combination with another therapy or therapeutic agent as described herein.

The present disclosure is further directed to the use of compounds of Formula ¢1) in the preparation of a medicament for use in therapy.

DETAILED DESCRIPTION

Compounds

In one aspect, the present disclosure provides compounds of Formula (I):

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770 or pharmaceutically acceptable salts thereof, wherein:

X¹ is CR¹⁰Rⁿ or NR⁷;

XisNorCR⁶;

R¹ is C1-3 alkyl or C1-3 haloalkyl;

R² is H, halo, C1-3 alkyl, C1-3 haloalkyl, CN, or C1-3 alkoxy;

R³ is H, halo, C1-3 alkyl, C1-3 haloalkyl, CN, or C1.3 alkoxy;

R⁴ is C1-3 alkyl or C1-3 haloalkyl;

R^s is H, halo, C1-3 alkyl, C1-3 haloalkyl, CN, or C1-3 alkoxy;

R⁶ and R⁷ are each independently selected from H, halo, CN, OR®⁴, SR®⁴, C(O)NR°*R^d4, OCiOjNR^⁴, NR^c4R^d4, NR^c4C(O)R^b4, NR^CiOjOR®⁴, NR^CCOjNR^⁴, NR^c4S(O)R^M, NR^S^R⁶⁴, NR^c4S(O)₂NR^c4R^d4, S(O)R^M, SCO^R^R*¹⁴, S(O)2R^M, SiO^NR^R⁰⁴, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C1-6 haloalkyl, phenyl, Cs-β cycloalkyl, a 5-6 membered heteroaryl having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C2^ alkynyl, phenyl, C3-6 cycloalky 1,5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁶ and R⁷ are each optionally substituted with 1,2, or 3 substituents independently selected from R^10A;

L is -&lt;CR^BR¹⁴)n-, wherein R¹³ and R¹⁴ are each independenently H, Ci-β alkyl, C&amp;-10 aryl, 5 to 10 membered heteroaryl or 4 to 7 membered heterocycloalkyl, wherein the C1-6 alkyl, Ce-io aryl, 5 to 10 membered heteroaryl or 4 to 7-membered heterocycloalkyl is optionally substituted with from 1 to 3 R¹⁷ groups; or R¹³ and R¹⁴ are taken together with the carbon atom to which they are attached form a C3-6 cycloalkyl or 4 to 6-membered heterocycloalkyl group; wherein the C3-6 cycloalkyl or 4 to 6-membered heterocycloalkyl

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 group is optionally substituted with from 1 to 3 R¹⁷ members; the subscript n is 1,2 or 3; in some embodiments, the subscript n is 1 or 2.

R⁸ is H or Ci-4 alkyl which is optionally substituted by halo, CN, OR³⁹, C(O)NR^c9R^d9, NRC9R® NR^QCOR¹’⁹, NR^CiOXJR®⁹, NR^CiOJNR^R⁰⁹, NR^c9S(O)R^w, NR^c9S(O)2R^b9, NR^c9S(O)2NR^c9R^d9, S(O)R^b9, SiOjNR^R⁰⁹, S(O)2R^b9, S(O)2NR^e9R^d9, phenyl, C3-7 cycloalkyl, a 5-6 membered heteroaryl moiety having carban and 1,2, or 3 heteroatoms independently selected from N, O and S, or a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said phenyl, C3-7 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁸ are each optionally substituted with 1 or 2 R¹⁹;

R*° and R¹¹ are each independently selected from H, Ci^ alkyl, C2-6 alkenyl, C2-6 alkynyl, Cu haloalkyl, Q-10 aryl, C3-10 cycloalkyl, a 5-10 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-10 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, Ce-io aryl, C3-10 cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl groups of R¹⁰and R¹¹ are each optionally substituted with 1,2,3, or 4 R^10A;

R^10A, at each occurrence, is independently selected from halo, CN, NO2, OR®⁴, SR^a4, C(O)R^b4 C(O)NR*R^d4, C(O)OR^a4, OC(O)R^M, OC(O)NR^c4R^d4, C(=NR^e4)NR^c4R^d4, NR^e4C(=NR^e4)NR^c4R^d4, NR^c4R^d4, NR^CiOjR”⁴, NR^CiOjOR®⁴, NR^c4C(0)NR^o4R^d4, NR^c4S(O)R^m, NR^c4S(O)2R^b4, NR^c4S(O)2NR^c4R^d4, S(O)R^M, S(O)NR^c4R^d4, S(O)2R^M, S(O)2NR^c4R^d+, Cw alkyl, C2-6 alkenyl, C2-6 alkynyl, Ci^ haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said Ci-β alkyl, C2-6 alkenyl, C₂^ alkynyl, phenyl, C3&lt; cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group of R^10A are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

R®⁴, R^w, R⁰⁴, and R^d4, at each occurrence, are independently selected from H, Ci-» alkyl, C2-4 alkenyl, C24 alkynyl, C1-4 haloalkyl, phenyl, cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Ci-4 alkyl, C2-4 alkenyl, C2-4 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 of R^a4, R⁶⁴, R⁰⁴, and R*¹⁴ are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

alternatively, R®⁴ and R¹*⁴ together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents independently selected from R¹⁹;

each R®⁴ is independently H or Cm alkyl;

alternatively, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group or a 4-, 5-, 6-, 7-, 8-, 9-, or 10membered heterocycloalkyl group; wherein said 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group and 4-, 5-, 6-, 7-, 8-, 9-, or 10-membered heterocycloalkyl group are each optionally substituted with 1, 2, 3 or 4 R^10A;

R¹² is H or Cm alkyl which is optionally substituted by R¹⁷;

R¹⁷, at each occurrence, is independently selected from halo, CN, NO2, OR^a7, SR^a7, C(O)R^b7, C(O)NR^c7R^d7, C(O)OR^a7, OC(O)R^b7, OC(O)NR®⁷R^d7, C(=NR^e7)NR^c7R^d7, NR^c7C(=NR^c7)NR^c7R^d7, NR^c7R^d7, NR®⁷C(O)R^b7, NR^c7C(O)OR^a7, NR^c7C(O)NR^c7R^d7, NR^c7S(O)R^b7, NR®⁷S(O)2R^b7, NR^c7S(O)2NR®⁷R^d7, S(O)R^b7, S(O)NR®⁷R^d7, S(O)2R^b7, S(O)2NR^c7R^d7, Cm alkyl, C2-6 alkenyl, C2-6 alkynyl, Cm haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said Cm alkyl, C2-6 alkenyl, C2^ alkynyl, phenyl, Cî^ cycloallyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R¹⁷ are each optionally substituted with 1, 2, or 3 substituents independently selected from R¹⁹;

R^a7, R^b7, R®⁷, and R^d7, at each occurrence, are independently selected from H, Cm alkyl, C2.4 alkenyl, C2-4 alkynyl, Cm haloalkyl, phenyl, C3-6 cycloalky 1, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cm alkyl, C2-4 alkenyl, C2-4 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R^a7, R^b7, R®⁷, and R^d7 are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

alternatively, R®⁷ and R⁰⁷ together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents independently selected from R¹⁹;

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

R^e7, at each occurrence, is independently H or Cm alkyl;

R¹⁹, at each occurrence, is independently selected from halo, CN, NO2, OR^a9, SR⁸⁹, C(O)R^b9, C^NR^R⁰⁹, C(O)OR^a9, OC(O)R^M, OC(O)NR^c9R^d9, NR^⁹, NR^c9C(O)R^b9, NR^c9C(O)OR^a9, NR^QCONR^⁹, NR^c9S(O)R^b9, NR^SCO^⁹, NR^c9S(O)2NR^c9R^d9, S(O)R^b9, S(O)NR^c9R^d9, S(O)2R^W, S^NR^R⁴⁹, Cim alkyl, C₂m alkenyl, C₂m alkynyl, and C1-4 haloalkyl;

Ra9, rc9 gnj Rd9, _{at eac}h _occurrence₅ aj-e independently selected from H and Ci-4 alkyl; and

R^b9, at each occurrence, is independently Ci-» alkyl. In one embodiment, Y is O. In another embodiment, Y is NR⁸.

In some embodiments of compounds of Formula (I):

X¹ is CR¹⁰Rⁿ or NR⁷;

XisNorCR⁶;

R¹ is C1-3 alkyl or C1-3 haloalkyl;

R² is H, halo, C1-3 alkyl, C1-3 haloalkyl, CN, or C1-3 alkoxy;

R³ is H, halo, C1-3 alkyl, C1-3 haloalkyl, CN, or C1-3 alkoxy;

R⁴ is C1-3 alkyl or C1-3 haloalkyl;

R^s is H, halo, C1.3 alkyl, Ci-3 haloalkyl, CN, or C1-3 alkoxy;

R⁶ is selected from H, halo, CN, OR⁸⁴, SR⁸⁴, C^NR^⁴, OC^NR^R⁴⁴, NR^c4R^d4, NR^c4C(O)R^b4, NR^CCOJOR³⁴, NR^c4C(O)NR^c4R^d4, NR^o4S(O)R^b4, NR^c4S(O)2R^b4, NR^c4S(O)2NR^c4R^d4, S(O)R^b4, S(O)NR°*R^d4, S(O)2R^M, S(O)2NR^c4R^d4, Cm alkyl, C2^ alkenyl, C2-6 alkynyl, C1-6 haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cm alkyl, C₂-6 alkenyl, C2-6 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁶ are each optionally substituted with 1,2, or 3 substituants independently selected from R^10A;

R⁷ is selected from H, CiOINR^R⁴⁴, S(O)R^M, SÎOINR^R, S(O)2R^b4, SiO^NR^R⁴⁴, Cim alkyl, C2-6 alkenyl, C2-6 alkynyl, C1-6 haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaiyl having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C₂-6 alkynyl, phenyl, Cs-6 cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 heterocycloalkyl groups of R⁷ are each optionally substituted with 1,2, or 3 substituents independently selected from R^10A;

L is -(€R¹³R^I4)n-, wherein R¹³ and R¹⁴ are each independently H, Ci^ alkyl, C&amp;-io aryl, 5 to 10 membered heteroaryl or 4 to 10 membered heterocycloalkyl, wherein the Ci^ alkyl, Ce-io aryl, 5 to 10 membered heteroaryl or 4 to 7 membered heterocycloalkyl is optionally substituted with from 1 to 3 R¹⁷ groups;

the subscript n is 1 or 2;

R⁸ is H or Ci-* alkyl which is optionally substituted by halo, CN, OR^a9, C(O)NR^c9R^d9, NR^c9R^d9, NR^c9C(O)R^b9, NR^c9C(O)OR^a9, NR^c9C(O)NR^c9R^d9, NR^c9S(O)R^b9, NR^SCOj^”⁹, NR^c9S(O)2NR^c9R^d9, S(O)R^b9, S(O)NR^c9R^d9, S(O)2R^b9, S(O)₂NR^c9R^d9, phenyl, C3-7 cycloalkyl, a 5-6 membered heteroaiyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, or a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said phenyl, C3-7 cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl groups of R⁸ are each optionally substituted with 1 or 2 R¹⁹;

R¹⁰ and R¹¹ are each independently selected from H, Ci^ alkyl, C₂^ alkenyl, C₂-6 alkynyl, C1-6 haloalkyl, Cô-io aiyl, C3-10 cycloalkyl, a 5-10 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-10 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cw alkyl, C2-6 alkenyl, C2-6 alkynyl, Cô-io aryl, C3-10 cycloalkyl, 5-10 membered heteroaiyl, and 4-10 membered heterocycloalkyl groups of R¹⁰and Rⁿ are each optionally substituted with 1,2,3, or 4 R^,0A;

R^10A, at each occurrence, is independently selected from halo, CN, NCh, OR⁸⁴, SR^a4, C(O)R^M, CiOjNR^R⁴⁴, C(O)OR^a4, OC(O)R^M, OC(O)NR^c4R^d4, C(=NR^e4)NR^c4R^d4, NR^c4C(=NR^e4)NR^c4R^d4, NR^c4R^d4, NR^CiOjR”⁴, NR^c4C(O)OR^a4, NR^CiOjNR^R⁰⁴, NR^c4S(O)R^M, NR^SiOlzRh⁴, NR^c4S(O)2NR^c4R^d4, 8(Ο)Κ^Μ, S(O)NR^c4R^d4, S(O)2R^M, S(O)2NR^c4R^d4, Cw alkyl, C2^ alkenyl, alkynyl, Cw haloalkyl, phenyl, C3-6 cycloalkyl, a

5-6 membered heteroaiyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S; wherein said Cw alkyl, C₂^ alkenyl, C₂^ alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl group of R^10A are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

R®⁴, R^M, R⁰⁴, and R^d4, ai each occurrence, are independently selected from H, Cm alkyl, C2-4 alkenyl, C2-4 alkynyl, Ci-4 haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said C1-4 alkyl, C2-« alkenyl, C2-4 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group of R³⁴, R^M, R⁰⁴, and R^d4 are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

alternatively, R®⁴ and R⁰⁴ together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents independently selected from R¹⁹;

R®⁴, at each occurrence, is H or Cm alkyl;

alternatively, R¹⁰ and Rⁿ together with die carbon atom to which they are attached form a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group or a 4-, 5-, 6-, 7-, 8-, 9-, or 10membered heterocycloalkyl group; wherein said 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group and 4-, 5-, 6-, 7-, 8-, 9-, or 10-membered heterocycloalkyl group are each optionally substituted with 1, 2, 3 or 4 R^10A;

R¹² is H or Ci-» alkyl which is optionally substituted by R¹⁷;

R¹⁷, at each occurrence, is independently selected from halo, CN, NO2, OR^a7, SR^a7, C(O)R^b7, CiOjNR^R⁴⁷, C(O)OR^a7, OC(O)R^b7, OC(O)NR^c7R^d7, C(=NR^e7)NR^c7R^d7, NR^c7C(=NR^e7)NR^c7R^d7, NR^c7R^d7, NR^c7C(O)R^b7, NR^c7C(O)OR^a7, NR^c7C(O)NR^c7R^d7, NR^c7S(O)R^b7, NR^c7S(O)2R^b7, NR^c7S(O)2NR^c7R^d7, S(O)R^b7, S(O)NR^c7R^d7, S(O&gt;2R^b7, S(O)îNR^c7R^d7, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C1-6 haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, phenyl, cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R¹⁷ are each optionally substituted with 1, 2, or 3 substituents independently selected from R¹⁹;

R^a7, R^b7, R^c7, and R^d7, at each occurrence, are independently selected from H, Cm alkyl, C2-4 alkenyl, C2M alkynyl, Cim haloalkyl, phenyl, C3-6 cycloalky 1, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cm alkyl, C2-4 alkenyl, C2M alkynyl,

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 phenyl, C3-6 cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl groups of R^a7, R^b7, R^c7, and R^d7 are each optionally substituted with 1,2, or 3 substituants independently selected from R¹⁹;

alternatively, R^c7 and R*¹⁷ together with die nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents independently selected from R¹⁹;

R^e7, at each occurrence, is independently H or Ci-4 alkyl;

R¹⁹, at each occurrence, is independently selected from halo, CN, NO2, OR^a9, SR³⁹, C(O)R^b9, CiOjNR^R⁴⁹, C(O)OR^a9, OC(O)R^W, OCfOjNR^⁹, NW⁹, NR^c9C(O)R^b9, NR^CCOjOR³⁹, NR^c9C(O)NR^c9R^d9, NR^c9S(O)R^b9, NR^SfOjîRh⁹, NR^c9S(O)2NR^c9R^d9, SfCjR”⁹, S(O)NR^c9R^d9, S^Rh⁹, S(O)₂NR^c9R^d9, Cm alkyl, C2-4 alkenyl, C2-4 alkynyl, and Cm haloalkyl;

R^a9, R⁰⁹, and R^d9, at each occurrence, are independently selected from H and Cm alkyl; and

R^b9, at each occurrence, is independently Ci-4 alkyl.

In some embodiments of compound of Formula (I), R⁷ is selected from H, C(O)NR^aR^d\ S(O)R^M, SfOjNR^R 8(Ο^^Μ, S(O)₂NR^c4R^d;, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl. Cm haloalkyl, phenyl, Cî^ cycloalkyl, a 5-6 membered heteroaryl having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁷ are each optionally substituted with 1,2, or 3 substituents independently selected from R^10A.

In some embodiments of compounds of Formula (I), the present disclosure provides an inhibitor of FGFR4, which is a compound having Formula (Π):

<img file="CA2976788C_D0003.tif" />

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 or a pharmaceutically acceptable salt thereof, wherein:

XisNorCR⁶;

R¹ is C1-3 alkyl or C1-3 haloalkyl;

R² is H, halo, C1-3 alkyl, C1-3 haloalkyl, CN, or C1-3 alkoxy;

R³ is H, halo, C1-3 alkyl, C1-3 haloalkyl, CN, or C1-3 alkoxy;

R⁴ is C1-3 alkyl or C1-3 haloalkyl;

R⁵ is H, halo, C1-3 alkyl, C1.3 haloalkyl, CN, or C1-3 alkoxy;

R⁶is H, halo, CN, OR⁸⁴, SR³⁴, CiOjNR^R*¹⁴, OC(O)NR^c4R^d4, NR^c4R^d4, NR^c4C(O)R^b4, NR^ÎOjOR⁸⁴, NR^CiOjNR^R⁰⁴, NR^iO^, NR^c4S(O)2R^b4, NR^fO^NR^R⁴⁴, S(O)R^m, S(O)NR^c4R^d4, S(O)2R^m, SfO^NR^R⁴⁴, Ci-e alkyl, C₂-6 alkenyl, C2-6 alkynyl, Ci^ haloalkyl, phenyl, C34 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cu alkyl, Cz^ alkenyl, C2-6 alkynyl, phenyl, C34 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁶ are each optionally substituted wilh 1, 2, or 3 substituents independently selected from R^10A;

L is -(CR^uR¹⁴)r, wherein R¹³ and R¹⁴ are each independently H, Cw alkyl, Ce-io aryl, 5 to 10 membered heteroaryl or 4 to 10 membered heterocycloalkyl, wherein the Ci^ alky l, Cô-io aryl, 5 to 10 membered heteroaryl or 4 to 10 membered heterocycloalkyl is optionally substituted with from 1 to 3 R¹⁷ groupswherein each R¹⁷ member is optionally substituted with from 1-3 R¹⁹ members; the subscript n is 1,2 or 3;

R⁸ is H or C1-4 alkyl which is optionally substituted by halo, CN, OR³⁹, CiOJNR^⁴⁹, NR^⁴⁹, NR^O^⁹, NR^CfOjOR³⁹, NR^C^NR^, NR^e9S(O)R^w, NR^SiO^⁹, NR^c9S(O)2NR^c9R^d9, S(O)R^b9, SiOjNR^R⁴⁹, S(O)2R^b9, S(O)2NR^c9R^d9, phenyl, C3-7 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, or a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said phenyl, C3-7 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R⁸ are each optionally substituted with 1 or 2 R¹⁹;

R¹⁰ is selected from Ci^ alkyl, C2-6 alkenyl, C₂^ alkynyl, Ci^ haloalkyl, Ce-10 aryl, C310 cycloalkyl, a 5-10 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S, and a 4-10 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, Ce-ίο aryl, C3-10 cycloalkyl, 5-10 membered

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 heteroaryl, and 4-10 membered heterocycloalkyl groups of R¹⁰ are each optionally substituted with 1,2, 3, or4R^10A;

R^10A, at each occurrence, is independently selected from halo, CN, NCh, OR⁸*, SR^a4, C(O)R^M, QCONR^RA C(O)OR^a4, OC(O)R^M, OC^NR^R, C(=NR^e4)NR^c4R^d4, NR^c4C(=NR^e4)NR^c4R^d4, NR^R, NR^c4C(O)R^b4, NR^c4C(O)OR^a4, NR^C^NR^R⁰⁴, NR^c4S(O)R^b4, NR^c4S(O)2R^b4, NR^c4S(O)2NR^c4R^d4, S(O)R^b4, S(O)NR^e4R^d4, S(O)2R^M, S(O)2NR^c4R^d4, Ch alkyl, C2-6 alkenyl, C2-6 alkynyl, Cu haloalky 1, phenyl, cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said Ch alkyl, C2-6 alkenyl, C2^ alkynyl, phenyl, cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl group of R^10A are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

R⁸⁴, R^M, R⁰⁴, and R^d4, at each occurrence, are independently selected from H, Ci-» alkyl, C2-» alkenyl, C2-4 alkynyl, Ci-4 haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cm alkyl, C2-» alkenyl, C2-4 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group of R⁸⁴, R^M, R°*, and R¹¹⁴ are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

alternatively, R⁰⁴ and R together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents independently selected from R¹⁹;

R^et is H or CiMalkyl;

R¹¹ is selected from Ci-β alkyl, €2-« alkenyl, C₂^ alkynyl, and Ci^ haloalkyl; wherein said Cm alkyl, C2-6 alkenyl, and C2-6 alkynyl are each optionally substituted with 1, 2 or 3 substituents independently selected from R¹⁹;

alternatively, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group or a 4-, 5-, 6-, 7-, 8-, 9-, or 10membered heterocycloalkyl group; wherein said 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group and 4-, 5-, 6-, 7-, 8-, 9-, or 10-membered heterocycloalkyl group are each optionally substituted with 1, 2, 3 or 4 R^10A;

R¹² is H or Cm alkyl which is optionally substituted by R¹⁷;

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

R¹⁷, at each occurrence, is independently selected from halo, CN, NO2,0R^a7, SR^a7, C(O)R^b7, CiOjNR^R⁰⁷, C(O)OR^a7, OC(O)R^b7, OC(O)NR^c7R^d7, C(=NR^e7)NR^c7R^d7, NR^c7C(=NR^e7)NR^c7R^d7, NR^c7R^d7, NR^c7C(O)R^b7, NR^c7C(O)OR^a7, NR^c7C(O)NR^c7R^d7, NR^c7S(O)R^b7, NR^c7S(O)2R^b7, NR^c7S(O)2NR^c7R^d7, S(O)R^b7, S(O)NR^c7R^d7, S(O)2R^b7, S(O&gt;2NR^c7R^d7, Cu alkyl, C2-6 alkenyl, C2-6 alkynyl, Cu haloalky 1, phenyl, Cm cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said C1-6 alkyl, C2-6 alkenyl, C2^ alkynyl, phenyl, C₃&lt; cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl groups of R¹⁷ are each optionally substituted with 1, 2, or 3 substituents independently selected from R¹⁹;

R^a7, R^b7, R^c7, and R^d7, at each occurrence, are independently selected from H, Cm alkyl, C2-4 alkenyl, C2-4 alkynyl, Cm haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S; wherein said Cm alkyl, C₂m alkenyl, C₂-4 alkynyl, phenyl, C3-6 cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl groups of R^a7, R^b7, R^c7, and R⁰⁷ are each optionally substituted with 1,2, or 3 substituents independently selected from R¹⁹;

alternatively, R⁶⁷ and R^d7 together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents independently selected from R¹⁹;

R^e7, at each occurrence, is H or Cm alkyl;

R¹⁹, at each occurrence, is independently selected from halo, CN, Nth, OR^a9, SR³⁹, CiOR”⁹, CiOjNR^R⁰⁹, C(O)OR^a9, OCCOjR”⁹, OC(O)NR^c9R^d9, NR^⁹, NR^OR¹»⁹, NR^CÎOjOR³⁹, NR^c9C(O)NR^c9R^d9, NR^c9S(O)R^b9, NR^O^⁹, NR^c9S(O&gt;2NR^c9R^d9, S(O)R^W, S(O)NR^c9R^d9, S(O)2R^b9, S^NR^⁹, Cm alkyl, Cm alkenyl, Cm alkynyl, and Cm haloalkyl;

rs9, rc9, r®, _{at eac}h _OCCUnrence, are independently selected from H and Cm alkyl; and

R^b9, at each occurrence, is Cm alkyl.

In some embodiments of compounds of Formula (I), the present disclosure provides compounds or pharmaceutically acceptable salts thereof, which are FGFR4 inhibitors and have Formula (III):

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

<img file="CA2976788C_D0004.tif" />

The variables R¹, R², R³, R⁴, R^s, R¹⁰, R¹¹, R¹², X and L are as defined in any embodiment of compound of Formula (I).

In some embodiments of compounds of Formula (I), the present disclosure provides 5 compounds, or pharmaceutically acceptable salts threof, which are FGFR4 inhibitors and have Formula (IV):

<img file="CA2976788C_D0005.tif" />

(IV)

The variables R¹, R², R³, R⁴, R⁵, R¹⁰, R¹¹, R¹², X and n are as defined in any embodiment of compound of Formula (I).

In some embodiments of compounds of Formula (I), the present disclosure provides compounds of Formula (V) or pharmaceutically acceptable salts thereof, which have FGFR4 inhibitory activities.

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0006.tif" />

° (V)

In some embodiments of compounds of Formula (V), R¹⁰ and R¹¹ are taken together with the carbon atom to which they are attached form C3-6 cycloalkyl, optionally substituted with 1 or 2 R^WA groups.

In certain embodiments of compounds of Formula (I), R¹⁰ and R¹¹ together with die carbon atom to which they are attached form a cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl group. In one embodiment, X is CH. In another embodiement, X is N.

In some embodiments of compounds of Formula (I), the present disclosure provides compounds of Formula (VI) or pharmaceutically acceptable salts thereof, which have FGFR4 inhibitory activities.

<img file="CA2976788C_D0007.tif" />

In some embodiments of compounds of Formula (VI), R⁷ is Ci-ό alkyl, phenyl, 5- or 6membered heteroaryl, C3-6 cycloalkyl or 4- to 6-membered heterocycloalkyl, each of which is optionally substituted with from 1-2 members selected from halo, Ci-4 alkyl, CN, Ci-* haloalkyl, Ci-4 alkoxy, phenyl, C3-6 cycloalkyl, 5- or 6-membered heteroaryl, C3-6 cycloalkyl or 4- to 6-membered heterocycloalkyl.

In certain embodiments of compounds of Formula (I), R⁷ is methyl, ethyl, isopropyl, n-butyl, cyanomethyl, 2,2,2-trifluoroethyl, phenyl, 3-pyridyl, l-methyl-lH-pyrazol-3-yl, 1methyl-lH-pyrazol-4-yl, tetrahydrofuran-3-yl, 3,3-difluorocyclobutyl, 2-methoxyethyl, cyclopropvlmethvl, 2,2-difluoroethyl, benzyl, 3-fluorobenzyl, pyridin-3-ylmethyl, (1-methyl

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 lH-pyrazol-4-yl)methyl, (1-methyl-lH-pyrazol-3-yl)methyl or (teterahydrofuranyl-3yl)methyl. In one embodiment, X is CH. In another embodiement, X is N.

In some embodiments the present disclosure provides inhibitors of FGFR4 having Formula (la):

<img file="CA2976788C_D0008.tif" />

(la) or a pharmaceutically acceptable salt thereof, wherein: R² is F or Cl;

R⁵ is F or Cl;

L is -(CR¹³R^,4)n-, wherein R¹³ and R¹⁴ are each independenently H, Cm alkyl or Ce-io aryl, wherein the Cm alkyl or Ce-io aryl is optionally substituted with from 1 to 3 R¹⁷ groups; or R¹³ and R¹⁴ are taken together with the carbon atom to which they are attached form a C3-6 cycloalkyl or 4 to 6-membered heterocycloalkyl group; wherein the Cî&lt; cycloalkyl or 4 to 6membered heterocycloalkyl group is optionally substituted with from 1 to 3 R¹⁷;

R⁸ is H or methyl;

R¹⁰ is selected from C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, Cm haloalkyl, Cô-ioaiyl, C310 cycloalkyl, a 5-10 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-10 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S; wherein said Cm alkyl, C₂&lt; alkenyl, C2-6 alkynyl, Ce-io aryl, C3-10 cycloalkyl, 5-10 membered heteroaryl, and 4-10 membered heterocycloalkyl groups of R¹⁰ are each optionally substituted with 1,2, 3, or 4 R^10A;

R^10A, at each occurrence, is independently selected from halo, CN, NO2, OR®⁴, SR^a4, C(O)R^M, CiOjNR^R⁴⁴, CfOjOR®⁴, OC(O)R^M, OC(O)NR^c4R^d4, C(=NR^e4)NR^c4R^d4, NR^c4C(=NR^e4)NR^c4R^d4, NR^R**, NR^C^R*⁴, NR^CiOjOR®⁴, NR^CiOjNR^R⁴⁴, NR^c4S(O)R^b4, NR^c4S(O)2R^b4, NR^SfOjzNR^R⁰⁴, S(O)R^b4, S(O)NR^c4R^d4, S(O)2R^M, SiOhNR^R⁴*, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, Ci-6 haloalkyl, phenyl, Cs^ cycloalkyl, a

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said Ci-6 alkyl, Ca+ alkenyl, C2+ alkynyl, phenyl, Cs^ cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl groups of R^10a are each optionally substituted with 1, 2, or 3 substituents independently selected from R¹⁹;

R^a4, R⁶⁴, R⁰⁴, and R^d4, at each occurrence, are independently selected from H, Ci-» alkyl, C2-4 alkenyl, C2-4 alkynyl, Ci-4 haloalkyl, phenyl, C3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety comprising carbon and 1, 2, or 3 heteroatoms independently selected fromN, O and S; wherein said Cm alkyl, C2-4 alkenyl, C2-4 alkynyl, phenyl, C3+cycloalkyl, 5-6 membered heteroaiyl, and 4-7 membered heterocycloalkyl groups of R^a4, R^M, R⁰⁴, and R^d4 are each optionally substituted with 1, 2, or 3 substituents independently selected fromR¹⁹;

alternatively, R⁰⁴ and R⁰⁴ together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1,2 or 3 substituents s independently selected from R¹⁹;

R®⁴, at each occurrence, is independently H or Ci-4 alkyl;

R¹¹ is selected from C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, and Ci+ haloalkyl;

alternatively, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group or a 4-, 5-, 6-, or 7-membered heterocycloalkyl group; wherein said 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group and 4-, 5-, 6-, or 7-membered heterocycloalkyl group are each optionally substituted with 1,2,3 or 4 RiOA.

R¹⁷, at each occuirence, is independently selected from OH, CN, amino, halo, C1-6 alkyl, Ci-λ alkoxy, C1-4 alkylthio, C1-4 alkylamino, di(Ci-4alkyl)amino, Ci-» haloalkyl, and Ci-» haloalkoxy;

R¹⁹, at each occurrence, is independently selected from halo, CN, NO2, OR^a9, SR⁸⁹, C(O)R^b9, C^NR^R⁰⁹, C(O)OR^a9, OC(O)R^M, OC(O)NR^c9R^d9, NR^¹¹⁹, NR^c9C(O)R^b9, NR^c9C(O)OR^a9, NR^c9C(O)NR^c9R^d9, NR^O^⁹, NR^c9S(O)2R^b9, NR^e9S(O)2NR^c9R^d9, S(O)R^W, S(O)NR^c9R^d9, S(O)2R^b9, SiO^NR^R⁴⁹, Cm alkyl, C2+ alkenyl, C2+ alkynyl, and Cm haloalkyl;

R®⁹, R⁰⁹, and R^d9, at each occurrence, are independently selected from H and Ci-4 alkyl; and

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

R^b9, at each occurrence, is independently Cm alkyl.

In some embodiments of compounds of Fomula (la) as described above, L is (CR¹³R¹⁴)n-, wherein R¹³ and R¹⁴ are each independently H, Cm alkyl, and Ce-io aryl, wherein die Ci+ alkyl and Ce-ίο aryl is optionally substituted with from 1 to 3 independently selected R¹⁷ groups.

In some embodiments, X is N.

In some embodiments, X is CR⁶.

In some embodiments, R⁶ is H, halo, CN, or Ci-6 alkyl. In some embodiments, R⁶ is H. In some embodiments, R⁶ is Ci-6 alkyl. In some embodiments, R⁶ is methyl, hi some embodiments, R⁶ is halo. In some embodiments, R⁶ is CN.

In some embodiments, R¹ is C1-3 alkyl. In some embodiments, R¹ is methyl.

In some embodiments, R² is halo. In some embodiments, R² is fluoro. In some embodiments, R² is chloro.

In some embodiments, R³ is H.

In some embodiments, R⁴ is C1-3 alkyl. In some embodiments, R⁴ is methyl.

In some embodiments, R^s is halo. In some embodiments, R⁵ is fluoro. In some embodiments, R^s is chloro.

In some embodiments, R² is fluoro and R^s is fluoro. In some embodiments, R² is chloro and R^s is chloro.

In some embodiments, R⁷ is Ci+ alkyl, phenyl, 5- or 6-membered heteroaiyl, C3-6 cycloalkyl or 4- to 6-membered heterocycloalkyl, each of which is optionally substituted with from 1-2 members selected from halo, C1-4 alkyl, CN, Ci-4haloalkyl, Cim alkoxy, phenyl, C3-6 cycloalkyl, 5- or 6-membered heteroaiyl, or 4- to 6-membered heterocycloalkyl.

In some embodiments, R⁷ is methyl, ethyl, propyl, isopropyl, n-butyl, cyanomethyl, 2,2,2-trifluoroethyl, phenyl, 3-pyridyl, l-methyl-lH-pyrazol-3-yl, l-methyl-lH-pyrazol-4-yl, tetrahydrofuran-3-yl, 3,3-difluorocyclobutyl, 2-methoxyethyl, cyclopropyl, cyclopropylmethyl, 2,2-difluoroethyl, benzyl, 3-fluorobenzyl, pyridin-3-ylmethyl, (1-methyllH-pyrazol-4-yl)methyl, (1 -methyl- lH-pyrazol-3-yI)methyl, (teterahydrofuranyl-3-yl)methyl, 2-fluoroethyl, 4-pyridyl, (piperidin-4-yl)methyl, (l-methylpiperidin-4-yl)methyl, (1methoxycarbonylpiperidin-4-yl)methyl, (1 -methylsulfonylpiperidin-4-yl)methyl, tetrahydropyran-4-yl, cyclobutyl, cyclopentyl, isobutyl, 1-(cyclobutylmethyl), or 4-methyl-Nisopropy lpiperidine-1 -carboxamide.

In some embodiments, R⁷ is methyl, ethyl, propyl, isopropyl, n-butyl, cyanomethyl, 2,2,2-trifluoroethyl, phenyl, 3-pyridyl, l-methyl-lH-pyrazol-3-yl, 1-methyl-lH-pyrazol-4-yl, 18

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 tetrahydrofuran-3-yl, 3,3-difluorocyclobutyl, 2-methoxyethyl, çyclopropyl, çyclopropylmethyl, 2,2-difluoroethyl, benzyl, 3-fluorobenzyl, pyridin-3-ylmethyl, (1-methyllH-pyrazol-4-yl)methyl, (1-methyl-lH-pyrazol-3-yl)methyl or (teterahydrofuranyl-3yl)methyl.

In some embodiments, R⁷ is ethyl, propyl, isopropyl, cyanomethyl, 2,2,2trifluoroethyl, 2,2-difluoroethyl, phenyl, 3-pyridyl, l-methyl-lH-pyrazol-3-yl, tetrahydrofuran-3-yl, 3,3-difluorocyclobutyl, 2-methoxyethyl, cyclopropyl, cyclopropylmethyl, 3-fluorobenzyl, pyridin-3-ylmethyl, (1 -methyl- lH-pyrazol-4-yl)methyl, or (teterahydrofuranyl-3-yl)methyl.

In some embodiments, R⁷ is 2-fluoroethyl, 4-pyridyl, (piperidin-4-yl)methyl, (1methylpiperidin-4-yl)me1hyl, (l-methoxycarbonylpiperidin-4-yl)methyl, (1methylsulfonylpiperidin-4-yl)methyl, tetrahydropyran-4-yl, cyclobutyl, cyclopentyl, isobulyl, 1-(cyclobutylmethyl), or 4-methyl-N-isopropylpiperidine-l -carboxamide.

In some embodiments, R¹ is C1-3 alkyl; R² is halo; R³ is H; R⁴ is C1-3 alkyl; and R^s is halo.

In some embodiments, R¹ is C1-3 alkyl; R² is F; R³ is H; R⁴ is C1-3 alkyl; and R⁵ is F.

in some embodiments, R¹ is methyl; R² is F; R³ is H; R⁴ is methyl; and R⁵ is F.

In some embodiments, R¹ is C1-3 alkyl; R² is Cl; R³ is H; R⁴ is C1-3 alkyl; and R⁵ is Cl.

In some embodiments, R¹ is methyl; R² is Cl; R³ is H; R⁴ is methyl; and R^s is Cl.

In some embodiments, R¹⁰ is Ci-β alkyl. In some embodiments, R¹⁰ is methyl.

In some embodiments, Rⁿ is C1-6 alkyl. In some embodiments, Rⁿ is methyl.

In some embodiments, R¹⁰ and Rⁿ are each C1-6 alkyl. In some embodiments, R¹⁰and R¹¹ are each methyl.

In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group. In some embodiments, R¹⁰and R¹¹ together with the carbon atom to which they are attached form a 3-, 4-, 5-, or 6membered cycloalkyl group. In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a 3-, 4-, or 5-membered cycloalkyl group.

In some embodiments, R¹⁰ and R^u together with the carbon atom to which they are attached form a cyclopropyl group. In some embodiments, R¹⁰ and R^u together with the carbon atom to which they are attached form a cyclobutyl group. In some embodiments, R¹⁰and R¹¹ together with the carbon atom to which they are attached form a cyclopentyl group. In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770 form a cyclohexyl group. In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a cycloheptyl group.

In some embodiments, R¹⁰ and R^u together with the carbon atom to which they are attached form a cyclopropyl group optionally substituted by 1 or 2 R^10A. In some embodiments, R¹⁰ and Rⁿ together with the carbon atom to which they are attached form a cyclobutyl group optionally substituted by 1 or 2 R^10A. In some embodiments, R¹⁰ and R¹¹together with the carbon atom to which they are attached form a cyclopentyl group optionally substituted by 1 or 2 R^10A. In some embodiments, R¹⁰ and R¹¹ together with die carbon atom to which they are attached form a cyclohexyl group optionally substituted by 1 or 2 R^10A.

In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl group.

In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a cyclopropyl or cyclopentyl group.

In some embodiments, R¹⁰ and R¹¹ together with fee carbon atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group.

In some embodiments, R¹⁰ and Rⁿ together with the carbon atom to which they are attached form atetrahydropyranyl group (e.g., 2-tetrahydropyranyl, 3-tetrahydropyranyl or 4tetrahydropyranyl), a tetrahydrofuranyl group (e.g., 2-tetrahydrofuranyl or 3tetrahydrofuranyl), tetrahydrothiophenyl group (e.g., 2-tetrahydrothiophenyl or 3tetrahydrothiophenyl), a pyrrolidinyl group (e.g., 2-pyrrolidinyl or 3-pyrrolidinyl), a piperidinyl group (e.g., 2-piperidinyl, 3-piperidinyl or 4- piperidinyl), 2-morpholinyl or 3morpholinyl, ech of which is optionally substituted with 1 or 2 R^10A groups. In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form a tetrahydropyranyl group. In some embodiments, R¹⁰ and R¹¹ together with the carbon atom to which they are attached form atetrahydropyranyl group optionally substituted by 1 or 2 R^10A. In some embodiments, R¹⁰ and R¹¹ together with toe carbon atom to which they are attached form a tetrahydrofuranyl group. In some embodiments, R¹⁰ and R¹¹ together with toe carbon atom to which they are attached form a tetrahydrofuranyl group optionally substituted by R^10A. In some embodiments, R¹⁰ and Rⁿ together with the carbon atom to which they are attached form an azetidinyl group. In some embodiments, R¹⁰ and R^utogether with toe carbon atom to which they are attached form an azetidinyl group optionally substituted by R^I0A.

In some embodiments, L is -(CR¹³R¹⁴)n-, wherein R¹³ and R¹⁴ are each independently H, Ci-6 alkyl, Ce-io aiyl, 5-10 membered heteroaryl or 4-10 membered heterocydoalkyl, each 20

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 of which is optionally substituted with from 1-3 R¹⁷ groups; and n is 1 or 2. In some embodiments, L is -(CR^I3R¹⁴)b-, wherein Rⁿ and R¹⁴ are each independently H, Ci-6 alkyl, Ce-io aryl, 5-10 membered heteroaryl or 4-10 membered heterocycloalkyl.

In some embodiments, L is -(CR¹³R¹⁴)n-, wherein R¹³ and R’⁴ are each independently H or R¹³ and R¹⁴ taken together with the carbon atom to which they are attached form a 3 to 6 membered cycloalkyl group or 4 to 7-membered heterocycloalkyl group, where the 3 to 6 membered cycloalkyl group or 4 to 7-membered heterocycloalkyl group is optionally substituted with from 1 or 2 R¹⁷ groups. In some embodiments, L is -(CR¹³R¹⁴)ii-, wherein R¹³ and R¹⁴ are each independently H or R¹³ and R¹⁴ taken together with the carbon atom to which they are attached form a 3 to 6 membered cycloalkyl group or 4 to 7-membered heterocycloalkyl group.

In some embodiments, L is -CH₂C(Rⁱ³)(R^,4&gt; or-C(R¹³XR¹⁴)CH2-, where R¹³ and R¹⁴ taken together with the carbon atom to which they are attached form cyclopropyl, cyclobutyl, cyclopentyl or çydohexyl group, each of which is optionally substituted with 1 or 2 R¹⁷ groups. In some embodiments, L is -CH2C(R¹³XR¹⁴&gt; or -C(R¹³)(R¹⁴)CH2-, where R¹³and R¹⁴ taken together with the carbon atom to which they are attached form cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl group.

In some embodiments, L is -CH₂C(R¹³XR’⁴)- or-C(R¹³XR¹⁴)CH₂-, where R¹³ and R¹⁴ taken together with the carbon atom to which they are attached form a tetrahydropyranyl group (e g., 2-tetrahydropyranyl, 3-tetrahydropyranyl or 4-tetrahydropyranyl), a tetrahydrofuranyl group (e.g., 2-tetrahydrofiiranyl or 3-tetrahydrofuranyl), tetrahydrothiophenyl group (e.g., 2-tetrahydrothiophenyl or 3-tetrahydrothiophenyl), a pyrrolidinyl group (e g., 2-pyrrolidinyl or 3-pyrrolidinyl), a piperidinyl group (e.g., 2piperidinyl, 3-piperidinyl or 4- piperidinyl), 2-moipholinyl or 3-morpholinyl, each of which is optionally substituted with 1 or 2 R¹⁷ groups. In some embodiments, L is CH2C(R¹³)(R¹⁴)- or -C(R¹³XR¹⁴)CH2-, where R¹³ and R¹⁴ taken together with the carbon atom to which they are attached form a tetrahydropyranyl group (e.g., 2-tetrahydropyranyl, 3tetrahydropyranyl or 4-tetrahydropyranyl), a tetrahydrofuranyl group (e g., 2tetrahydrofuranyl or 3-tetrahydrofuranyl), tetrahydrothiophenyl group (e.g., 2tetrahydrothiophenyl or 3-tetrahydrothiophenyl), a pyrrolidinyl group (e.g., 2-pyrrolidinyl or 3-pyrrolidinyl), a piperidinyl group (e.g., 2-piperidinyl, 3-piperidinyl or 4- piperidinyl), 2morpholinyl or 3-morpholinyl.

In some embodiments, L is -(CH2)n-, where n is 1,2 or 3. In one embodiment, L is CH₂

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

In some embodiments, L is -(CH2)n-, where n is 1 or 2.

In a preferred embodiment, R⁸ is H. In another preferred embodiment, R¹² is H. In another preferred embodiment, X is CH. In another preferred embodiment, X is N.

In some embodiments, R¹⁷ is methyl.

In some embodiments, R⁸ is H or Cm alkyl. In some embodiments, R⁸ is H or methyl. In some embodiments, R⁸ is H. In some embodiments, R⁸ is methyl.

In some embodiments, R¹² is H or Cm alkyl which is optionally substituted by R¹⁷; wherein R¹⁷, at each occurrence, is independently selected from halo, CN, OR^a7, C(O)R^b7, C(O)NR^c7R^d7, C(O)OR^a7, OC(O)R^b7, OC(O)NR^c7R^d7, NR^c7R^d7, NR^c7C(O)R^b7, NR^c7C(O)OR^a7, NR^c7C(O)NR^c7R^d7, NR^c7S(O)R^b7, NR^c7S(O)2R^b7, NR^c7S(O)2NR^c7R^d7, S(O)R^b7, S(O)NR^c7R^d7, S(O)₂R^b7, Cm alkyl, Cm alkenyl, Cm alkynyl, and Cm haloalkyl.

In some embodiments, R^a7, R^c7, and R^d7, at each occurrence, are independently selected from H and Cm alkyl; and each R^b7 is independently Cm alkyl.

In some embodiments, R¹² is H or Cm alkyl. In some embodiments, R¹² is Cm alkyl. In some embodiments, R¹² is Cm alkyl substituted by -N(CH3&gt;2. In some embodiments, R¹²is -CH2-N(CH3&gt;2. In some embodiments, R¹² is methyl. In some embodiments, R¹² is Cm alkyl substituted by piperidin-1-yI. In some embodiments, R¹² is -CH2(piperidin-l-yl).

In some embodiments, R¹² is H.

In some embodiments, the present disclosure provides an inhibitor of FGFR4 which is a compound having Formula (lb):

<img file="CA2976788C_D0009.tif" />

(lb) or a pharmaceutically acceptable salt thereof, wherein X, L, R¹, R², R³, R⁴, R^s, R⁸, R¹⁰, R¹¹, and R¹² are as defined herein; R^,2a is H; and R^12b is H.

In some embodiments the present invention is an inhibitor of FGFR4 which is a compound having Formula (Ic):

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

<img file="CA2976788C_D0010.tif" />

(le) or a pharmaceutically acceptable salt thereof, wherein L, R², R^s, R⁸, R¹⁰, Rⁿ, and R¹² are as defined herein; R^12a is H; and R^12b is H.

In some embodiments, R^12a is H, F, methyl, or trifluoromethyl.

In some embodiments, R^12b is H, F, methyl, or trifluoromethyl.

It is further appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, can also be provided in combination in a single embodiment Conversely, various features of die invention which are, for brevity, described in the context of a single embodiment, can also be provided separately or in any suitable subcombination.

At various places in the present specification, substituents of compounds of the invention are disclosed in groups or in ranges. It is specifically intended that the invention include each and every individual subcombination of the members of such groups and ranges. For example, the term “Ci^ alkyl” is specifically intended to individually disclose methyl, ethyl, C3 alkyl, C4 alkyl, Cs alkyl, and Ce alkyl.

At various places in the present specification various aryl, heteroaryl, cycloalkyl, and heterocycloalkyl rings are described. Unless otherwise specified, these rings can be attached to the rest of die molecule at any ring member as permitted by valency. For example, die term “a pyridine ring” or “pyridinyl” may refer to a pyridin-2-yl, pyridin-3-yl, or pyridin-4-yl ring.

The term “n-membered” where n is an integer typically describes the number of ringforming atoms in a moiety where the number of ring-forming atoms is n. For example, piperidinyl is an example of a 6-membered heterocycloalkyl ring, pyrazolyl is an example of a 5-membered heteroaryl ring, pyridyl is an example of a 6-membered heteroaryl ring, and 1,2,3,4-tetrahydro-naphthalene is an example of a 10-membered cycloalkyl group.

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

For compounds of the invention in which a variable appears more than once, each variable can be a different moiety independently selected from die group defining the variable. For example, where a structure is described having two R groups that are simultaneously present on the same compound, the two R groups can represent different moieties independently selected from the group defined for R.

Definitions

As used herein, die phrase “optionally substituted” means unsubstituted or substituted.

As used herein, the term “substituted” means that a hydrogen atom is replaced by a non-hydrogen group. It is to be understood that substitution at a given atom is limited by valency.

As used herein, the term “Ch, ” where i and j are integers, employed in combination with a chemical group, designates a range of the number of carbon atoms in the chemical group with i-j defining the range. For example, Ci-6 alkyl refers to an alkyl group having 1, 2, 3,4,5, or 6 carbon atoms.

As used herein, the term “alkyl,” employed alone or in combination with other terms, refers to a saturated hydrocarbon group that may be straight-chain or branched. In some embodiments, the alkyl group contains 1 to 6,1 to 4, or 1 to 3 carbon atoms. Examples of alkyl moieties include, but are not limited to, chemical groups such as methyl, ethyl, npropyl, isopropyl, n-butyl, isobutyl, sec-butyl, ierr-butyl, «-pentyl, 2-methyl-l-butyl, 3pentyl, «-hexyl, 1,2,2-trimethylpropyl, and the like. In some embodiments, the alkyl group is methyl, ethyl, or propyl.

As used herein, the term Ci-j alkylene, employed alone or in combination with other terms, means a saturated divalent linking hydrocarbon group that may be straight-chain or branched, having i to j carbons. In some embodiments, the alkylene group contains from 1 to 4 carbon atoms, from 1 to 3 carbon atoms, or from 1 to 2 carbon atoms. Examples of alkylene moieties include, but are not limited to, chemical groups such as methylene, ethylene, 1,1ethylene, 1,2-ethylene, 1,3-propylene, 1,2-propylene, 1,1-propylene, isopropylene, and the like.

As used herein, “alkenyl,” employed alone or in combination with other terms, refers to an alkyl group having one or more carbon-carbon double bonds. In some embodiments, the alkenyl moiety contains 2 to 6 or 2 to 4 carbon atoms. Example alkenyl groups include, but are not limited to, ethenyl, η-propenyl, isopropenyl, «-butenyl, sec-butenyl, and the like.

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

As used herein, “alkynyl,” employed alone or in combination with other terms, refers to an alkyl group having one or more carbon-carbon triple bonds. In some embodiments, the alkynyl moiety contains 2 to 6 or 2 to 4 carbon atoms. Example alkynyl groups include, but are not limited to, ethynyl, propyn-l-yl, propyn-2-yl, and the like.

As used herein, “halo” or “halogen”, employed alone or in combination with other terms, includes fluoro, chloro, bromo, and iodo. In some embodiments, halo is F or Cl. In some embodiments, halo is F.

As used herein, die term ‘haloalkyl,” employed alone or in combination with other terms, refers to an alkyl group having up to the full valency of halogen atom substituents, which may either be the same or different. In some embodiments, die halogen atoms are fluoro atoms. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms. Example haloalkyl groups include CFs, C2F5, CHF2, CCh, CHCh, CzCls, and die like.

As used herein, the term “alkoxy,” employed alone or in combination with other terms, refers to a group of formula -O-alkyl. In some embodiments, the alkyl group has 1 to 6,1 to 4, or 1 to 3 carbon atoms. Example alkoxy groups include methoxy, ethoxy, propoxy (e.g., n-propoxy and isopropoxy), t-butoxy, and the like. In some embodiments, alkoxy is methoxy.

As used herein, “haloalkoxy,” employed alone or in combination with other terms, refers to a group of formula -O-(haloalkyl). In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1 to 3 carbon atoms. An example haloalkoxy group is -OCF3.

As used herein, “amino,” employed alone or in combination with other terms, refers toNH₂.

As used herein, the term “alkylamino,” employed alone or in combination with other terms, refers to a group of formula -NH(alkyl). In some embodiments, the alkylamino group has 1 to 6 or 1 to 4 carbon atoms. Example alkylamino groups include methylamino, ethylamino, propylamino (e.g., n-propylamino and isopropylamino), and die like.

As used herein, the term “dialkylamino,” employed alone or in combination with other terms, refers to a group of formula -N(alkyl)2. Example dialkylamino groups include dimethylamino, diethylamino, dipropylamino (e.g., di(n-propyl)amino and di(isopropyl)amino), and the like. In some embodiments, each alkyl group independentiy has 1 to 6 or 1 to 4 carbon atoms.

As used herein, the term “alkylthio,” employed alone or in combination with other terms, refers to a group of formula -S-alkyl. In some embodiments, the alkyl group has 1 to 6 or 1 to 4 carbon atoms.

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

As used heron, the term “cycloalkyl,” employed alone or in combination with other terms, refers to anon-aromatic cyclic hydrocarbon including cyclized alkyl and alkenyl groups. Cycloalkyl groups can include mono- or polycyclic (e.g., having 2, 3, or 4 fused, bridged, or spiro rings) ring systems. Also included in the definition of cycloalkyl are moieties that have one or more aromatic rings (e.g., aiyl or heteroaiyl rings) fused (i.e., having a bond in common with) to the cycloalkyl ring, for example, benzo derivatives of cyclopentane, cyclohexene, cyclohexane, and the like, or pyrido derivatives of cyclopentane or cyclohexane. Ring-forming carbon atoms of a cycloalkyl group can be optionally substituted by oxo. Cycloalkyl groups also include cycloalkylidenes. The term “cycloalkyl” also includes bridgehead cycloalkyl groups (e.g., non-aromatic cyclic hydrocarbon moieties containing at least one bridgehead carbon, such as admantan-l-yl) and spirocycloalkyl groups (e.g., non-aromatic hydrocarbon moieties containing at least two rings fused at a single carbon atom, such as spiro[2.5]octane and the like). In some embodiments, the cycloalkyl group has 3 to 10 ring members, or 3 to 7 ring members, or 3 to 6 ring members. In some embodiments, the cycloalkyl group is monocyclic or bicyclic. In some embodiments, the cycloalkyl group is monocyclic. In some embodiments, the cycloalkyl group is a C3-7 monocyclic cycloalkyl group. Example cycloalkyl groups include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, cyclohexadienyl, cycloheptatrienyl, norbomyl, norpinyl, norcamyl, tetrahydronaphthalenyl, octahydronaphthalenyl, indanyl, and the like. In some embodiments, the cycloalkyl group is cyclopropyl, cyclobutyl, cyclopentyl, or cyclohexyl.

As used herein, the term “heterocycloalkyl,” employed alone or in combination with other terms, refers to a non-aromatic ring or ring system, which may optionally contain one or more alkenylene or alkynylene groups as part of the ring structure, which has at least one heteroatom ring member independently selected from nitrogen, sulfur, oxygen, and phosphorus. Heterocycloalkyl groups can include mono- or polycyclic (e g., having 2,3 or 4 fused, bridged, or spiro rings) ring systems. In some embodiments, the heterocycloalkyl group is a monocyclic or bicyclic group having 1, 2,3, or 4 heteroatoms independently selected from nitrogen, sulfur and oxygen. Also included in the definition of heterocycloalkyl are moieties that have one or more aromatic rings (e.g., aiyl or heteroaiyl rings) fused (i.e., having a bond in common with) to the non-aromatic heterocycloalkyl ring, for example, 1,2,3,4-tetrahydro-quinoline and the like. Heterocycloalkyl groups can also include bridgehead heterocycloalkyl groups (e.g., a heterocycloalkyl moiety containing at least one bridgehead atom, such as azaadmantan-l-yl and the like) and spiroheterocycloalkyl 26

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 groups (e.g., a heterocycloalkyl moiety containing at least two rings fused at a single atom, such as [l,4-dioxa-8-aza-spiro[4.5]decan-N-yl] and the like). In some embodiments, the heterocycloalkyl group has 3 to 10 ring-forming atoms, 4 to 10 ring-forming atoms, or 3 to 8 ring forming atoms. In some embodiments, the heterocycloalkyl group has 1 to 5 heteroatoms, 1 to 4 heteroatoms, 1 to 3 heteroatoms, or 1 to 2 heteroatoms. The carbon atoms or heteroatoms in the ring(s) of toe heterocycloalkyl group can be oxidized to form a carbonyl, an N-oxide, or a sulfonyl group (or other oxidized linkage) or a nitrogen atom can be quatemized. In some embodiments, toe heterocycloalkyl portion is a C2-7 monocyclic heterocycloalkyl group. In some embodiments, the heterocycloalkyl group is a morpholine ring, pyrrolidine ring, piperazine ring, piperidine ring, dihydropyran ring, tetrahydropyran ring, tetrahyropyridine, azetidine ring, or tetrahydrofuran ring. In some embodiments, toe heterocycloalkyl is a 4-7 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S. In some embodiments, the heterocycloalkyl is 4-10 membered heterocycloalkyl moiety having carbon and 1,2, or 3 heteroatoms independently selected from N, O and S.

As used herein, toe term “aryl,” employed alone or in combination with other terms, refers to a monocyclic or polycyclic (e.g., having 2 fused rings) aromatic hydrocarbon moiety, such as, but not limited to, phenyl, 1-naphthyl, 2-naphtoyl, and the like. In some embodiments, aryl groups have from 6 to 10 carbon atoms or 6 carbon atoms. In some embodiments, toe aryl group is a monocyclic or bicyclic group. In some embodiments, the aryl group is phenyl or naphthyl.

As used herein, toe term “heteroaryl,” employed alone or in combination with other terms, refers to a monocyclic or polycyclic (e.g., having 2 or 3 fused rings) aromatic hydrocarbon moiety, having one or more heteroatom ring members independently selected from nitrogen, sulfur and oxygen. In some embodiments, the heteroaiyl group is a monocyclic or bicyclic group having 1,2,3, or 4 heteroatoms independently selected from nitrogen, sulfur and oxygen. Example heteroaryl groups include, but are not limited to, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, furyl, thienyl, imidazolyl, thiazolyl, indolyl, pyrryl, oxazolyl, benzofuryl, benzothienyl, benztoiazolyl, isoxazolyl, pyrazolyl, triazolyl, tetrazolyl, indazolyl, 1,2,4-toiadiazolyl, isothiazolyl, purinyl, carbazolyl, benzimidazolyl, indolinyl, pyrrolyl, azolyl, quinolinyl, isoquinolinyl, benzisoxazolyl, imidazo[l,2-b] thiazolyl or toe like. The carbon atoms or heteroatoms in toe ring(s) of toe heteroaryl group can be oxidized to form a carbonyl, an N-oxide, or a sulfonyl group (or other oxidized linkage) or a nitrogen atom can be quatemized, provided toe aromatic nature

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 of the ring is preserved. In one embodiment die heteroaryl group is a 5 to 10 membered heteroaiyl group. In another embodiment the heteroaiyl group is a 5 to 6 membered heteroaiyl group. In some embodiments, the heteroaiyl is a 5-6 membered heteroaiyl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S. In some embodiments, the heteroaiyl is a 5-10 membered heteroaiyl moiety having carbon and 1,2, or 3 heteroatoms independently selected fromN, O and S.

The compounds described herein can be asymmetric (e.g., having one or more stereocenters). All stereoisomers, such as enantiomers and diastereomers, are intended unless otherwise indicated. Compounds of die present invention that contain asymmetrically substituted carbon atoms can be isolated in optically active or racemic forms. Methods on how to prepare optically active forms from optically inactive starting materials are known in the art, such as by resolution of racemic mixtures or by stereoselective synthesis. Many geometric isomers of olefins, C=N double bonds, and the like can also be present in die compounds described herein, and all such stable isomers are contemplated in the present invention. Cis and trans geometric isomers of the compounds of the present invention are described and may be isolated as a mixture of isomers or as separated isomeric forms.

Resolution of racemic mixtures of compounds can be carried out by methods known in the art. An example method includes fractional reciystallizaion using a chiral resolving acid which is an optically active, salt-forming organic acid. Suitable resolving agents for fractional recrystallization methods are, for example, optically active acids, such as the D and L forms of tartaric acid, diacetyltartaric acid, dibenzoyltartaric acid, mandelic acid, malic acid, lactic add or the various optically active camphorsulfonic acids. Other resolving agents suitable for fractional crystallization methods include stereoisomerically pure forms of methylbenzylamine (e.g., S and R forms, or diastereomerically pure forms), 2-phenylglydnol, norephedrine, ephedrine, N-methylephedrine, cyclohexylethylamine, 1,2diaminocyclohexane, and the like.

Resolution of racemic mixtures can also be carried out by elution on a column packed with an optically active resolving agent (e.g., dinitrobenzoylphenylglycine). Suitable elution solvent composition can be determined by one skilled in the art.

Compounds of the invention also include tautomeric forms. Tautomeric forms result from the swapping of a single bond with an adjacent double bond together with the concomitant migration of a proton. Tautomeric forms include prototropic tautomers which are isomeric protonation states having the same empirical formula and total charge. Example prototropic tautomers include ketone - enol pairs, amide - imidic acid pairs, lactam - lactim

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 pairs, enamine - imine pairs, and annular forms where a proton can occupy two or more positions of a heterocyclic system, for example, 1H- and 3H-imidazole, 1H-, 2H- and 4H1,2,4-triazole, 1H- and 2H- isoindole, and 1H- and 2H-pyrazole. Tautomeric forms can be in equilibrium or sterically locked into one form by appropriate substitution.

Compounds of the invention also include all isotopes of atoms occurring in the intermediates or final compounds. Isotopes include those atoms having the same atomic number but different mass numbers. For example, isotopes of hydrogen include tritium and deuterium.

The term, “compound,” as used herein is meant to include all stereoisomers, geometric iosomers, tautomers, and isotopes of the structures depicted.

All compounds, and pharmaceutically acceptable salts thereof, can be found together with other substances such as water and solvents (e.g., in the form of hydrates and solvates) or can be isolated.

In some embodiments, the compounds of the invention, or salts thereof, are substantially isolated. By “substantially isolated” is meant thatlhe compound is at least partially or substantially separated from the environment in which it was formed or detected. Partial separation can include, for example, a composition enriched in the compounds of the invention. Substantial separation can include compositions containing at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, at least about 95%, at least about 97%, or at least about 99% by weight of the compounds of the invention, or salt thereof. Methods for isolating compounds and their salts are routine in the art.

The phrase “pharmaceutically acceptable” is employed herein to refer to those compounds, materials, compositions, and/or dosage forms which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio.

The present invention also includes pharmaceutically acceptable salts of the compounds described herein. As used herein, pharmaceutically acceptable salts refers to derivatives of the disclosed compounds wherein the parent compound is modified by converting an existing acid or base moiety to its salt form. Examples of pharmaceutically acceptable salts include, but are not limited to, mineral or organic acid salts of basic residues such as amines; alkali or organic salts of acidic residues such as carboxylic acids; and die like. The pharmaceutically acceptable salts of the present invention include the non-toxic salts of the parent compound formed, for example, from non-toxic inorganic or organic acids.

84036542

The pharmaceutically acceptable salts of the present invention can be synthesized from the parent coinpound which contains a basic or acidic moiety by conventional chemical methods. Generally, such salts can be prepared by reacting the free acid or base forms of these compounds with a stoichiometric amount of the appropriate base or acid in water or in an organic solvent, or in a mixture of the two; generally, non-aqueous media like ether, ethyl acetate, alcohols (e.g., methanol, ethanol, iso-propanol, or butanol) or acetonitrile (ACN) are preferred. Lists of suitable salts are found in Remington’s Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa, 1985, p. 1418 and Journal of Pharmaceutical Science, 66,2 (1977).

The following abbreviations may be used herein: AcOH (acetic acid); Ac₂O (acetic anhydride); aq. (aqueous); atm. (aimosphere(s)); Boc (/-butoxycarbonyl); br (broad); Cbz (carboxybenzyl); calc, (calculated); d (doublet); dd (doublet of doublets); DCM (dichloromethane); DEAD (diethyl azodicarboxylate); DIAD (ΛζΛ/'-diisopropyl azidodicarboxylate); DIPEA (#qV-diisopropylethylamine); DMF (MV-dimethylformamide); Et (ethyl); EtOAc (ethyl acetate); g (gram(s)); h (hour(s)); HATU (ΥΛΛ'Λ-tetrameÜiyl-O(7-azabenzotnazol-l-yl)uronium hexafluorophosphate); HC1 (hydrochloric acid); HPLC (high performance liquid chromatography); Hz (hertz); J (coupling constant); LCMS (liquid chromatography - mass spectrometry); m (multiplet); M (molar); mCPBA (3chloroperoxybenzoic add); MgSO₄ (magnesium sulfate); MS (Mass spectrometry); Me (methyl); MeCN (acetonitrile); MeOH (methanol); mg (milligram(s)); min. (minutes(s)); mL (milliliters)); mmol (nûllimole(s)); N (normal); NaHCCh (sodium bicarbonate); NaOH (sodium hydroxide); NazSO4 (sodium sulfate); NH4CI (ammonium chloride); NH₄OH (ammonium hydroxide); nM (nanomolar); NMR (nuclear magnetic resonance spectroscopy); OTf (trifluoromethanesulfonate); Pd (palladium); Ph (phenyl); pM (picomolar); PMB (paramethoxybeanzyl), POCh (phosphoryl chloride); RP-HPLC (reverse phase high performance liquid chromatography); s (singlet); t (triplet or tertiary); TBS (tert-butyldimethylsilyl); tert (tertiaiy ); tt (triplet of triplets); /-Bu (/erl-butyl); TFA (trifluoroacetic acid); THF (tetrahydrofuran); pg (microgram(s)); pL (microliter(s)); pM (micromolar); wt% (weight percent).

Synthesis

Compounds of the invention, including salts thereof, can be prepared using known organic synthesis techniques and according to various possible synthetic routes.

Date Reçue/Date Received 2022-08-05

84036542

The reactions for preparing compotmds of the invention can be carried out in suitable solvents winch can be readily selected by one of skill in the art of organic synthesis. Suitable solvents can be substantially nonreactive with the starting materials (reactants), the intermediates, or products at the temperatures at which the reactions are carried out, e.g., temperatunes which can range from the solvent's freezing temperature to the solvent’s boiling temperature. A given reaction can be carried out in one solvent or a mixture of more than one solvent. Depending on the particular reaction step, suitable solvents for a particular reaction step can be selected by the skilled artisan.

Preparation of compounds of the invention can involve the protection and deprotection of various chemical groups. The need for protection and deprotection, and foe selection of appropriate protecting groups, can be readily determined by one skilled in the art. The chemistry of protecting groups can be found, for example, in T.W. Greene and P.G.M. Wuts, Protective Groups in Organic Synthesis, 3rd. Ed., Wiley &amp; Sons, Inc., New York (1999).

Reactions can be monitored according to any suitable method known in the art. For example, product formation can be monitored by spectroscopic means, such as nuclear magnetic resonance spectroscopy (e.g., or ¹³C), infrared spectroscopy, spectrophotometry (e.g, UV-visible), or mass spectrometry, or by chromatography such as high performance liquid chromatography (HPLC) or thin layer chromatography.

The expressions, “ambient temperature,” “room temperature,” and “r.t”, as used herein, are understood in the art, and refer generally to a temperature, e.g. a reaction temperature, that is about the temperature of die room in which die reaction is carried out, for example, a temperature from about 20 °C to about 30 °C.

Compounds of the invention can be prepared by one skilled in the art according to preparatory routes known in die literature. Example synthetic methods for preparing compounds of die invention are provided in die Schemes below.

Compounds of formula 4 can be synthesized using procedures as outlined in Scheme 1. Reduction of ester 1 using diisobutylaluminium hydride (DIBAL-H) can afford the corresponding aldehyde 2. Reductive amination of aldehyde 2 with aniline 3 using a suitable reducing agent such as sodium triacetoxy borohydride [Na(OAc)3BH] in the presence of an acid such as acetic acid or trifluoroacetic add (TFA) can afford the amine of formula 4.

Date Reçue/Date Received 2022-08-05

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

Scheme 1

<img file="CA2976788C_D0011.tif" />

reductive aminaeon

<img file="CA2976788C_D0012.tif" />

The substituted dichloropyrimidine of formula 8 can be prepared by the method described in Scheme 2. Treatment of the commercially available 5(chloromethyl)pyrimidine-2,4(1//,3//)-dione, 5, with phosphoryl chloride (POCb) can afford the trichloride pyrimidine of formula 6. Compound 6 can be converted to the iodide of formula 7 using sodium iodide (Nai), tetrabutylammonium iodide (BiuNI), or an equivalent iodide reagent Compound 7 can be coupled with aniline 3 in the presence of a suitable base, such as diisopropylethylamine ('PnNEt), cesium carbonate (CS2CO3), or sodium hydride (NaH), to give the dichloropyrimidine of formula 8.

<img file="CA2976788C_D0013.tif" />

Scheme 2

<img file="CA2976788C_D0014.tif" />

<img file="CA2976788C_D0015.tif" />

The synthesis of compound 14 is outlined in Scheme 3. Compound 9 can be treated with ethyl 3-chloro-3-oxopropanoate and NaH in THF to provide amide 10. Lactam 11 can be prepared by the treatment of compounds 10 with a strong base, such as NaH or CS2CO3 in DMF, and followed by an acid, such as HC1, mediated decarboxylation. α-Substituted lactam 12 can be obtained by treating compound 11 with a base, such as NaH or CS2CO3 in DMF or

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 acetonitrile, and followed by the addition of halides R*°X and/or RⁿX (X is halo such as Cl, Br, or I). Chloride 12 can be converted to the compound 13 when treated with Zn(CN)2 / Pd(dppf)2C12 in DMF. The reduction of compound 13 with DIBAL-H can give die corresponding amine, the acryloylation of which with acryloyl chloride in the presence of a base, such as /PnNEt, can afford amide 14.

Scheme 3

<img file="CA2976788C_D0016.tif" />

X = CHorN

R¹⁰X and/or R¹¹X Base

<img file="CA2976788C_D0017.tif" />

Alkene 17 can be synthesized following the procedure shown in Scheme 4. Therefore, 10 compound 9 is first treated with triphosgene in the presence of a base such as pyridine, and then with amine R⁷NHa in the presence of another base (e.g. DIPEA) to afford urea 15. Upon treatment with a proper base (e.g. CszCOs), cyclization of 15 takes place to generate cyclic urea 16, which can then be converted to compound 17 using standard Suzuki conditions in the presence of 4,4,5,5-tetramethyl-2-vinyl-l,3,2-dioxaborolane.

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

Scheme 4

<img file="CA2976788C_D0018.tif" />

X= CH orN

<img file="CA2976788C_D0019.tif" />

<img file="CA2976788C_D0020.tif" />

Alkene 17 can be prepared by an alternative procedure outlined in scheme 5. The Suzuki coupling between compound 9 and 4,4,5,5-tetTamethyl-2-vinyl-l,3,2-dioxaborolane 5 can provide alkene 18, which can be converted to the corresponding amine 19 under standard Buchwald-Hartwig amination conditions using reagents such as, for example, Pd(OAc)2/Xantphos/Cs2CO3 or Pd2.(dba)3/BINAP/NaOtBu, etc. Treatment of amine 19 with triphosgene in the presence of a base such as EtsN or DIPEA can afford compound 17.

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

<img file="CA2976788C_D0021.tif" />

X = CH orN

X = CH orN

Triphosgene

<img file="CA2976788C_D0022.tif" />

Compound 23 can be synthesized by the method described in Scheme 6.The oxidative cleavage of the alkene 17 using OsO4/NaIO4 can provide aldehyde 20. Compound 20 is then converted to the corresponding amine 21 via reductive amination. The coupling reaction between amine 21 and acid chloride 22 can occur in the presence of a base, such as zPrzNEt or EtîN to afford amide 23.

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0023.tif" />

Oxidative deavage

<img file="CA2976788C_D0024.tif" />

Methods of Use

Compounds of the invention can inhibit the activity of toe FGFR4 enzyme. For example, toe compounds of toe invention can be used to inhibit activity of an FGFR4 enzyme in a cell or in an individual or patient in need of inhibition of the enzyme by administering an inhibiting amount of a compound of toe invention to toe cell, individual, or patient.

In some embodiments, toe compounds of toe invention are selective for toe enzyme FGFR4 over one or more of FGFR1, FGFR2, and/or FGFR3. In some embodiments, the compounds of toe invention are selective for toe enzyme FGFR4 over FGFR1, FGFR2, and FGFR3. In some embodiments, the compounds of the invention are selective for toe enzyme FGFR4 over VEGFR2. In some embodiments, toe selectivity is 2-fold or more, 3-fold or more, 5-fold or more, 10-fold or more, 25-fold or more, 50-fold or more, or 100-fold or more.

As FGFR4 inhibitors, toe compounds of the invention are useful in toe treatment of various diseases associated with abnormal expression or activity of toe FGFR4 enzyme or FGFR ligands. Compounds which inhibit FGFR will be useful in providing a means of preventing toe growth or inducing apoptosis in tumors, particularly by inhibiting angiogenesis. It is therefore anticipated that the compounds will prove useful in treating or preventing proliferative disorders such as cancers. In particular tumours with activating

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 mutants of receptor tyrosine kinases or upregulation of receptor tyrosine kinases may be particularly sensitive to the inhibitors.

In certain embodiments, the FGFR4, or a mutant thereof, activity is inhibited irreversibly. In certain embodiments, FGFR4, or a mutant thereof, activity is inhibited irreversibly by covalently modifying Cys 552 of FGFR4.

In certain embodiments, the invention provides a method for treating a FGFR4mediated disorder in a patient in need thereof, comprising the step of administering to said patient a compound according to the invention, or a pharmaceutically acceptable composition thereof.

For example, the compounds of the invention are usefill in the treatment of cancer. Example cancers include bladder cancer, breast cancer, cervical cancer, colorectal cancer, cancer of the small intestine, colon cancer, rectal cancer, cacncer of the anus, endometrial cancer, gastric cancer, head and neck cancer (eg., cancers of the larynx, hypopharynx, nasopharynx, oropharynx, lips, and mouth), kidney cancer, liver cancer (e.g., hepatocellular carcinoma, cholangiocellular carcinoma), lung cancer (e.g., adenocarcinoma, small cell lung cancer and non-small cell lung carcinomas, parvicellular and non-parvicellular carcinoma, bronchial carcinoma, bronchial adenoma, pleuropulmonary blastoma), ovarian cancer, prostate cancer, testicular cancer, uterine cancer, esophageal cancer, gall bladder cancer, pancreatic cancer (e.g. exocrine pancreatic carcinoma), stomach cancer, thyroid cancer, parathyroid cancer, skin cancer (e.g., squamous cell carcinoma, Kaposi sarcoma, Merkel cell skin cancer), and brain cancer (e.g., astrocytoma, medulloblastoma, ependymoma, neuroectodermal tumors, pineal tumors).

Further example cancers include hematopoietic malignancies such as leukemia or lymphoma, multiple myeloma, chronic lymphocytic lymphoma, adult T cell leukemia, B-cell lymphoma, cutaneous T-cell lymphoma, acute myelogenous leukemia, Hodgkin’s or nonHodgkin’s lymphoma, myeloproliferative neoplasms (e.g., polycythemia vera, essential thrombocythemia, and primary myelofibrosis), Waldenstrom's Macroglubulinemia, hairy cell lymphoma, chronic myelogenic lymphoma, acute lymphoblastic lymphoma, AIDS-related lymphomas, and Burkitt's lymphoma

Other cancers treatable with foe compounds of foe invention include tumors of foe eye, glioblastoma, melanoma, rhabdosarcoma, lymphosarcoma, and osteosarcoma

The compounds of the invention can also be useful in foe inhibition of tumor metastisis.

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

In some embodiments, the present invention provides a method for treating hepatocellular carcinoma in a patient in need thereof, comprising the step of administering to said patient a compound according to the invention, or a pharmaceutically acceptable composition thereof.

In some embodiments, die present invention provides a method for treating Rhabdomyosarcoma, esophageal cancer, breast cancer, or cancer of a head or neck, in a patient in need thereof, comprising the step of administering to said patient a compound according to the invention, or a pharmaceutically acceptable composition thereof.

In some embodiments, the present invention provides a method of treating cancer, wherein the cancer is selected from hepatocellular cancer, breast cancer, bladder cancer, colorectal cancer, melanoma, mesothelioma, lung cancer, prostate cancer, pancreatic cancer, testicular cancer, thyroid cancer, squamous cell carcinoma, glioblastoma, neuroblastoma, uterine cancer, and rhabdosarcoma.

As used herein, the term “cell” is meant to refer to a cell that is in vitro, ex vivo or in vivo. In some embodiments, an ex vivo cell can be part of a tissue sample excised from an organism such as a mammal. In some embodiments, an in vitro cell can be a cell in a cell culture. In some embodiments, an in vivo cell is a cell living in an organism such as a mammal.

As used herein, the term “contacting” refers to the bringing together of indicated moieties in an in vitro system or an in vivo system. For example, “contacting” the FGFR4 enzyme with a compound of the invention includes the administration of a compound of the present invention to an individual or patient, such as a human, having FGFR, as well as, for example, introducing a compound of foe invention into a sample containing a cellular or purified preparation containing foe FGFR4 enzyme.

As used herein, the term “individual” or “patient,” used interchangeably, refers to any animal, including mammals, preferably mice, rats, other rodents, rabbits, dogs, cats, swine, cattle, sheep, horses, or primates, and most preferably humans.

As used herein, the phrase “therapeutically effective amount” refers to foe amount of active compound or pharmaceutical agent that elicits foe biological or medicinal response in a tissue, system, animal, individual or human that is being sought by a researcher, veterinarian, medical doctor or other clinician.

As used herein foe term “treating” or “treatment” refers to 1) preventing the disease; for example, preventing a disease, condition or disorder in an individual who may be predisposed to the disease, condition or disorder but does not yet experience or display the

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 pathology or symptomatology of the disease; 2) inhibiting the disease; for example, inhibiting a disease, condition or disorder in an individual who is experiencing or displaying the pathology or symptomatology of the disease, condition or disorder (i.e., arresting further development of the pathology and/or symptomatology), or 3) ameliorating the disease; for example, ameliorating a disease, condition or disorder in an individual who is experiencing or displaying die pathology or symptomatology of the disease, condition or disorder (i.e., reversing the pathology and/or symptomatology).

Combination Therapy

One or more additional pharmaceutical agents or treatment methods such as, for example, anti-viral agents, chemotherapeutics or other anti-cancer agents, immune enhancers, immunosuppressants, radiation, anti-tumor and anti-viral vaccines, cytokine therapy (e.g., IL2, GM-CSF, etc.), and/or tyrosine kinase inhibitors can be used in combination with the compounds of the present invention for treatment of FGFR-associated diseases, disorders or conditions. The agents can be combined with the present compounds in a single dosage form, or the agents can be administered simultaneously or sequentially as separate dosage forms.

Suitable antiviral agents contemplated for use in combination with the compounds of the present invention can comprise nucleoside and nucleotide reverse transcriptase inhibitors (NRTIs), non-nucleoside reverse transcriptase inhibitors (NNRTIs), protease inhibitors and other antiviral drugs.

Example suitable NRTIs include zidovudine (AZT); didanosine (ddl); zalcitabine (ddC); stavudine (d4T); lamivudine (3TC); abacavir (1592U89); adefovir dipivoxil [bis(POM)-PMEA]; lobucavir (BMS-180194); BCH-10652; emitricitabine [(-)-FTC]; beta-LFD4 (also called beta-L-D4C and named beta-L-2', 3'-dicleoxy-5-fluoro-cytidene); DAPD, (()-beta-D-2,6,-diamino-purine dioxolane); and lodenosine (FddA). Typical suitable NNRTIs include nevirapine (BI-RG-587); delaviradine (BHAP, U-90152); efavirenz (DMP-266); PNU-142721; AG-1549; MKC-442 (l-(ethoxy-methyl)-5-(l-methylethyl)-6-(phenylmethyl)(2,4( lH,3H)-pyrimidinedione); and (+)-calanolide A (NSC-675451) and B. Typical suitable protease inhibitors include saquinavir (Ro 31-8959); ritonavir (ABT-538); indinavir (MK639); nelfiiavir (AG-1343); amprenavir (141W94); lasinavir (BMS-234475); DMP-450; BMS-2322623; ABT-378; and AG-1 549. Other antiviral agents include hydroxyurea, ribavirin, IL-2, IL-12, pentafuside and Yissum Project No. 11607.

Suitable agents for use in combination with the compounds of the present invention for the treatment of cancer include chemotherapeutic agents, targeted cancer therapies,

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 immunotherapies or radiation therapy. Compounds of this invention may be effective in combination with anti-hormonal agents for treatment of breast cancer and other tumors. Suitable examples are anti-estrogen agents including but not limited to tamoxifen and toremifene, aromatase inhibitors including but not limited to letrozole, anastrozole, and exemestane, adrenocorticosteroids (e.g. prednisone), progestins (e.g. megastrol acetate), and estrogen receptor antagonists (e.g. fulvestrant). Suitable anti-hormone agents used for treatment of prostate and other cancers may also be combined with compounds of the present invention. These include anti-androgens including but not limited to flutamide, bicalutamide, and nilutamide, luteinizing hormone-releasing hormone (LHRH) analogs including leuprolide, goserelin, triptorelin, and histrelin, LHRH antagonists (e.g. degarelix), androgen receptor blockers (e.g. enzalutamide) and agents that inhibit androgen production (e.g. abiraterone).

Compounds of the present invention may be combined with or in sequence with other agents against membrane receptor kinases especially for patients who have developed primary or acquired resistance to the targeted therapy. These therapeutic agents include inhibitors or antibodies against EGFR, Her2, VEGFR, c-Met, Ret, IGFR1, or Flt-3 and against cancer-associated fusion protein kinases such as Bcr-Abl and EML4-Alk. Inhibitors against EGFR include gefitinib and erlotinib, and inhibitors against EGFR/Her2 include but are not limited to dacomitinib, afatinib, lapitinib and neratinib. Antibodies against 1he EGFR include but are not limited to cetuximab, panitumumab and necitumumab. Inhibitors of cMet may be used in combination with FGFR inhibitors. These include onartumzumab, tivantnib, and INC-280. Agents against Abi (or Bcr-Abl) include imatinib, dasatinib, nilotinib, and ponatinib and those against Aik (or EML4-ALK) include crizotinib.

Angiogenesis inhibitors may be efficacious in some tumors in combination with FGFR inhibitors. These include antibodies against VEGF or VEGFR or kinase inhibitors of VEGFR. Antibodies or other therapeutic proteins against VEGF include bevacizumab and aflibercept. Inhibitors of VEGFR kinases and other anti-angiogenesis inhibitors include but are not limited to sunitinib, sorafenib, axitinib, cediranib, pazopanib, regorafenib, brivanib, and vandetanib

Activation of intracellular signaling pathways is frequent in cancer, and agents targeting components of these pathways have been combined with receptor targeting agents to enhance efficacy and reduce resistance. Examples of agents that may be combined with compounds of the present invention include inhibitors of the PI3K-AKT-mTOR pathway.

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770 inhibitors of the Raf-MAPK pathway, inhibitors of JAK-ST AT pathway, and inhibitors of protein chaperones and cell cycle progression.

Agents against the PI3 kinase include but are not limited topilaralisib, idelalisib, buparlisib. Inhibitors of mTOR such as rapamycin, sirolimus, temsirolimus, and everolimus may be combined with FGFR inhibitors. Other suitable examples include but are not limited to vemurafenib and dabrafenib (Raf inhibitors) and trametinib, selumetinib and GDC-0973 (MEK inhibitors). Inhibitors of one or more JAKs (e.g., ruxolitinib, baricitinib, tofacitinib), Hsp90 (e.g., tanespimycin), çyclin dependent kinases (e.g., palbociclib), HDACs (e.g., panobinostat), PARP (e.g., olaparib), and proteasomes (e.g., bortezomib, carfilzomib) can also be combined with compounds of the present invention. In some embodiments, the JAK inhibitor is selective for JAKI over JAK2 and JAK3.

Other suitable agents for use in combination with the compounds of the present invention include chemotherapy combinations such as platinum-based doublets used in lung cancer and other solid tumors (cisplatin or cafboplatin plus gemcitabine; cisplatin or carboplatin plus docetaxel; cisplatin or carboplatin plus paclitaxel; cisplatin or carboplatin plus pemetrexed) or gemcitabine plus paclitaxel bound particles (Abraxane®).

Suitable chemotherapeutic or other anti-cancer agents include, for example, alkylating agents (including, without limitation, nitrogen mustards, ethylenimine derivatives, alkyl sulfonates, nitrosoureas and triazenes) such as uracil mustard, chlormethine, cyclophosphamide (Cytoxan™), ifosfamide, melphalan, chlorambucil, pipobroman, triethylene-melamine, triethylenethiophosphoramine, busulfan, carmustine, lomustine, streptozocin, dacarbazine, and temozolomide.

Other suitable agents for use in combination with the compounds of the present invention include: dacarbazine (DTIC), optionally, along with other chemotherapy drugs such as carmustine (BCNU) and cisplatin; toe “Dartmouth regimen,” which consists of DTIC, BCNU, cisplatin and tamoxifen; a combination of cisplatin, vinblastine, and DTIC; or temozolomide. Compounds according to the invention may also be combined with immunotherapy drugs, including cytokines such as interferon alpha, interleukin 2, and tumor necrosis factor (TNF) in.

Suitable chemotherapeutic or other anti-cancer agents include, for example, antimetabolites (including, without limitation, folic acid antagonists, pyrimidine analogs, purine analogs and adenosine deaminase inhibitors) such as methotrexate, 5-fluorouracil, floxuridine, cytarabine, 6-mercaptopurine, 6-thioguanine, fludarabine phosphate, pentostatine, and gemcitabine.

84036542

Suitable chemotherapeutic or other anti-cancer agents further include, for example, certain natural products and their derivatives (for example, vinca alkaloids, antitumor antibiotics, enzymes, lymphokines and epipodophyllotoxins) such as vinblastine, vincristine, vindesine, bleomycin, dactinomycin, daunorubicin, doxorubicin, epirubicin, idarubicin, araC, paclitaxel (TAXOL™), mithramycin, deoxycoformycin, mitomycin-C, L-asparaginase, interferons (especially IFN-a), etoposide, and teniposide.

Other cytotoxic agents include navdbene, CPT-11, anastrozole, letrazole, capecitabine, reloxafine, cyclophosphamide, ifosamide, and droloxafine.

Also suitable are cytotoxic agents such as epidophyllotoxin; an antineoplastic enzyme; a topoisomerase inhibitor; procarbazine; mitoxantrone; platinum coordination complexes such as cis-platin and carboplatin; biological response modifiers; growth inhibitors; antihormonal therapeutic agents; leucovorin; tegafiir; and haematopoietic growth factors

Other anti-cancer agent(s) include antibody therapeutics such as trastuzumab (Herceptin), antibodies to costimulatoiy molecules such as CTLA-4,4-1BB and PD-1, or antibodies to cytokines (IL-10, TGF-β, etc.).

Other anti-cancer agents also include those that block immune cell migration such as antagonists to chemokine receptors, including CCR2 and CCR4.

Other anti-cancer agents also include those that augment the immune system such as adjuvants or adoptive T cell transfer.

Anti-cancer vaccines include dendritic cells, synthetic peptides, DNA vaccines and recombinant viruses.

Methods for the safe and effective administration of most of these chemotherapeutic agents are known to those skilled in the art. In addition, their administration is described in the standard literature. For example, the administration of many of the chemotherapeutic agents is described in the Physicians' Desk Reference (PDR, e.g., 1996 edition, Medical Economics Company, Montvale, NJ).

Pharmaceutical Formulations and Dosage Forms

When employed as pharmaceuticals, the compounds of the invention can be administered in the form of pharmaceutical compositions which refers to a combination of a compound of the invention, or its pharmaceutically acceptable salt, and at least one

Date Reçue/Date Received 2022-084)5

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 pharmaceutically acceptable carrier. These compositions can be prepared in a manner well known in the pharmaceutical art, and can be administered by a variety of routes, depending upon whether local or systemic treatment is desired and upon the area to be treated. Administration may be topical (including ophthalmic and to mucous membranes including intranasal, vaginal and rectal delivery), pulmonary {e.g., by inhalation or insufflation of powders or aerosols, including by nebulizer, intratracheal, intranasal, epidermal and transdermal), ocular, oral or parenteral. Methods for ocular delivery can include topical administration (eye drops), subconjunctival, periocular or intravitreal injection or introduction by balloon catheter or ophthalmic inserts surgically placed in the conjunctival sac. Parenteral administration includes intravenous, intraarterial, subcutaneous, intraperitoneal, or intramuscular injection or infusion; or intracranial, e.g., intrathecal or intraventricular, administration. Parenteral administration can be in the form of a single bolus dose, or may be, for example, by a continuous perfusion pump. Pharmaceutical compositions and formulations for topical administration may include transdermal patdies, ointments, lotions, creams, gels, drops, suppositories, sprays, liquids and powders. Conventional pharmaceutical carriers, aqueous, powder or oily bases, thickeners and the like may be necessary or desirable.

This invention also includes pharmaceutical compositions which contain, as the active ingredient, one or more of the compounds of the invention above in combination with one or more pharmaceutically acceptable carriers. In making the compositions of the invention, the active ingredient is typically mixed with an excipient, diluted by an excipient or enclosed within such a carrier in the form of, for example, a capsule, sachet, paper, or other container. When the excipient serves as a diluant, it can be a solid, semi-solid, or liquid material, which acts as a vehicle, carrier or medium for the active ingredient. Thus, the compositions can be in the form of tablets, pills, powders, lozenges, sachets, cachets, elixirs, suspensions, emulsions, solutions, syrups, aerosols (as a solid or in a liquid medium), ointments containing, for example, up to 10 % by weight of die active compound, soft and hard gelatin capsules, suppositories, sterile injectable solutions, and sterile packaged powders.

In preparing a formulation, the active compound can be milled to provide the appropnate particle size prior to combining with the other ingredients. If the active compound is substantially insoluble, it can be milled to a particle size of less than 200 mesh. If the active compound is substantially water soluble, the particle size can be adjusted by milling to provide a substantially uniform distribution in the formulation, e.g. about 40 mesh.

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770

Some examples of suitable excipients include lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microciystalline cellulose, polyvinylpyrrolidone, cellulose, water, syrup, and methyl cellulose. The formulations can additionally include: lubricating agents such as talc, magnesium stearate, and mineral oil; wetting agents; emulsifying and suspending agents; preserving agents such as methyl- and propylhydroxy-benzoates; sweetening agents; and flavoring agents. The compositions of the invention can be formulated so as to provide quick, sustained or delayed release of die active ingredient after administration to the patient by employing procedures known in the art.

The compositions can be formulated in a unit dosage form, each dosage containing from about 5 to about 100 mg, more usually about 10 to about 30 mg, of die active ingredient. The term unit dosage forms refers to physically discrete units suitable as unitary dosages for human subjects and other mammals, each unit containing a predetermined quantity of active material calculated to produce the desired therapeutic effect, in association with a suitable pharmaceutical excipient.

The active compound can be effective over a wide dosage range and is generally administered in a pharmaceutically effective amount. It will be understood, however, that the amount of the compound actually administered will usually be determined by a physician, according to the relevant circumstances, including the condition to be treated, the chosen route of administration, the actual compound administered, the age, weight, and response of tiie individual patient, the severity of the patient's symptoms, and the like.

For preparing solid compositions such as tablets, the principal active ingredient is mixed with a pharmaceutical excipient to form a solid pre-formulation composition containing a homogeneous mixture of a compound of die present invention. When referring to these pre-formulation compositions as homogeneous, the active ingredient is typically dispersed evenly throughout the composition so that the composition can be readily subdivided into equally effective unit dosage forms such as tablets, pills and capsules. This solid pre-formulation is then subdivided into unit dosage forms of the type described above containing from, for example, 0.1 to about 500 mg of the active ingredient of the present invention.

The tablets or pills of the present invention can be coated or otherwise compounded to provide a dosage form affording the advantage of prolonged action. For example, the tablet or pill can comprise an inner dosage and an outer dosage component, the latter being in the form of an envelope over the former. The two components can be separated by an enteric layer

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 which serves to resist disintegration in the stomach and permit die inner component to pass intact into the duodenum or to be delayed in release. A variety of materials can be used for such enteric layers or coatings, such materials including a number of polymeric acids and mixtures of polymeric acids with such materials as shellac, cetyl alcohol, and cellulose acetate.

The liquid forms in which the compounds and compositions of the present invention can be incorporated for administration orally or by injection include aqueous solutions, suitably flavored syrups, aqueous or oil suspensions, and flavored emulsions with edible oils such as cottonseed oil, sesame oil, coconut oil, or peanut oil, as well as elixirs and similar pharmaceutical vehicles.

Compositions for inhalation or insufflation include solutions and suspensions in pharmaceutically acceptable, aqueous or organic solvents, or mixtures thereof, and powders. The liquid or solid compositions may contain suitable pharmaceutically acceptable excipients as described supra. In some embodiments, the compositions are administered by the oral or nasal respiratory route for local or systemic effect. Compositions in can be nebulized by use of inert gases. Nebulized solutions may be breathed directly from the nebulizing device or the nebulizing device can be attached to a face masks tent, or intermittent positive pressure breathing machine. Solution, suspension, or powder compositions can be administered orally or nasally from devices which deliver the formulation in an appropriate manner.

The amount of compound or composition administered to a patient will vary depending upon what is being administered, the purpose of the administration, such as prophylaxis or therapy, the state of the patient, the maimer of administration, and the like. In therapeutic applications, compositions can be administered to a patient already suffering from a disease in an amount sufficient to cure or at least partially arrest the symptoms of the disease and its complications. Effective doses will depend on the disease condition being treated as well as by the judgment of the attending clinician depending upon factors such as die severity of the disease, the age, weight and general condition of the patient, and the like.

The compositions administered to a patient can be in the form of pharmaceutical compositions described above. These compositions can be sterilized by conventional sterilization techniques, or may be sterile filtered. Aqueous solutions can be packaged for use as is, or lyophilized, the lyophilized preparation being combined with a sterile aqueous carrier prior to administration. The pH of the compound preparations typically will be between 3 and 11, more preferably from 5 to 9 and most preferably from 7 to 8. It will be understood that

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 use of certain of the foregoing excipients, carriers, or stabilizers will result in the formation of pharmaceutical salts.

The therapeutic dosage of the compounds of the present invention can vary according to, for example, the particular use for which the treatment is made, the manner of administration of the compound, the health and condition of the patient, and the judgment of the prescribing physician. The proportion or concentration of a compound of the invention in a pharmaceutical composition can vary depending upon a number of factors including dosage, chemical characteristics (e.g., hydrophobicity), and tee route of administration. For example, the compounds of the invention can be provided in an aqueous physiological buffer solution containing about 0.1 to about 10% w/v of the compound for parenteral administration. Some typical dose ranges are from about 1 pg/kg to about 1 g/kg of body weight per day. In some embodiments, the dose range is from about 0.01 mg/kg to about 100 mg/kg of body weight per day. The dosage is likely to depend on such variables as the type and extort of progression of the disease or disorder, the overall health status of the particular patient, the relative biological efficacy of the compound selected, formulation of 1he excipient, and its route of administration. Effective doses can be extrapolated from doseresponse curves derived from in vitro or animal model test systems.

The compounds of the invention can also be formulated in combination with one or more additional active ingredients which can include any pharmaceutical agent such as antiviral agents, vaccines, antibodies, immune enhancers, immune suppressants, antiinflammatory agents and the like.

Labeled Compounds and Assay Methods

Another aspect of the present invention relates to fluorescent dye, spin label, heavy metal or radio-labeled compounds of the invention that would be usefill not only in imaging but also in assays, both in vitro and in vivo, for localizing and quantitating the FGFR enzyme in tissue samples, including human, and for identifying FGFR enzyme ligands by inhibition binding of a labeled compound. Accordingly, the present invention includes FGFR enzyme assays that contain such labeled compounds.

The present invention further includes isotopically-labeled compounds of the invention. An “isotopically” or “radio-labeled” compound is a compound of the invention where one or more atoms are replaced or substituted by an atom having an atomic mass or mass number different from the atomic mass or mass number typically found in nature (i.e.,

C* 02976788 2017-08-15

WO 2016/134314 PCT/IIS2016/018770 naturally occurring). Suitable radionuclides that may be incorporated in compounds of the present invention include but are not limited to ²H (also written as D for deuterium), ³H (also written as T for tritium), ⁿC, ¹³C, ¹⁴C, ¹³N, ^1SN, ^l50,¹⁷0,¹⁸0,¹⁸F, ^3SS, ³⁶C1,⁸²Br, ^7SBr, ⁷⁶Br, ’’Br, ¹²³1, ¹²⁴1, ¹²⁵I and ^,3,L The radionuclide that is incorporated in 1he instant radio-labeled compounds will depend on the specific application of that radio-labeled compound. For example, for in vitro FGFR enzyme labeling and competition assays, compounds that incorporate ³H, ¹⁴C, ⁸²Br, ¹²⁵1,¹³¹I, or ^3SS will generally be most useful. For radio-imaging applications ⁿC, ¹⁸F, ^12SI, ¹²³1, ¹²⁴1, ¹³¹1, ⁷⁵Br, ⁷⁶Br or ⁷⁷Br will generally be most useful.

It is understood that a “radio-labeled ” or “labeled compound” is a compound that has incorporated at least one radionuclide. In some embodiments the radionuclide is selected from the group consisting of ³H, ¹⁴C, ^12SI, ³⁵S and ⁸²Br.

Synthetic methods for incorporating radio-isotopes into organic compounds are applicable to compounds of the invention and are well known in the art.

A radio-labeled compound of the invention can be used in a screening assay to identify/evaluate compounds. In general terms, a newly synthesized or identified compound (i.e., test compound) can be evaluated for its ability to reduce binding of the radio-labeled compound of the invention to the FGFR4 enzyme. Accordingly, the ability of a test compound to compete with the radio-labeled compound for binding to the FGFR4 enzyme directly correlates to its binding affinity.

Kits

The present invention also includes pharmaceutical kits useful, for example, in the treatment or prevention of FGFR-associated diseases or disorders, obesity, diabetes and other diseases referred to herein which include one or more containers containing a pharmaceutical composition comprising a therapeutically effective amount of a compound of the invention. Such kits can further include, if desired, one or more of various conventional pharmaceutical kit components, such as, for example, containers with one or more pharmaceutically acceptable carriers, additional containers, etc., as will be readily apparent to those skilled in the art. Instructions, either as inserts or as labels, indicating quantities of the components to be administered, guidelines for administration, and/or guidelines for mixing the components, can also be included in the kit.

The invention will be described in greater detail by way of specific examples. The following examples are offered for illustrative purposes, and are not intended to limit the invention in any manner. Those of skill in the art will readily recognize a variety of non47

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 critical parameters which can be changed or modified to yield essentially the same results. The compounds of the Examples were found to be inhibitors of one or more FGFR’s as described below.

EXAMPLES

Experimental procedures for compounds of the invention are provided below. All the starting materials are commercially available or readily synthezied according to procedures known in the art. Preparatory LC-MS purifications of some of the compounds prepared were performed on Waters mass directed fractionation systems. The basic equipment setup, protocols, and control software for the operation of these systems have been described in detail in the literature. See e.g. “Two-Pump At Column Dilution Configuration for Preparative LC-MS”, K. Blom, J. Combi. Chern., 4,295 (2002); “Optimizing Preparative LCMS Configurations and Methods for Parallel Synthesis Purification”, K. Blom, R. Sparks, J. Doughty, G. Everlof, T. Haque, A. Combs, J. Combi. Chem., 5,670 (2003); and Preparative LC-MS Purification: Improved Compound Specific Method Optimization'', K. Blom, B. Glass, R Sparks, A. Combs, J. Combi. Chem., 6, 874-883 (2004). The compounds separated were typically subjected to analytical liquid chromatography mass spectrometry (LCMS) for purity check under the following conditions: Instrument; Agilent 1100 series, LC/MSD, Column: Waters Sunfire™ Cis 5 pm particle size, 2.1 x 5.0 mm, Buffers: mobile phase A: 0.025% TFA in water and mobile phase B: acetonitrile; gradient 2% to 80% of B in 3 minutes with flow rale 2.0 mL/minute.

Some of the compounds prepared were also separated on a preparative scale tty reverse-phase high performance liquid chromatography (RP-HPLC) with MS detector or flash chromatography (silica gel) as indicated in the Examples. Typical preparative reversephase high performance liquid chromatography (RP-HPLC) column conditions are as follows:

pH = 2 purifications: Waters Sunfire™ Cie 5 gm particle size, 19 x 100 mm column, eluting with mobile phase A: 0.1% TFA (trifluoroacetic acid) in water and mobile phase B: acetonitrile; the flow rate was 30 mL/minute, the separating gradient was optimized for each compound using Ihe Compound Specific Method Optimization protocol as described in the literature [see Preparative LCMS Purification: Improved Compound Specific Method Optimization, K. Blom, B. Glass, R. Sparks, A. Combs, J. Comb. Chem., 6, 874-883 (2004)]. Typically, the flow rate used with the 30 x 100 mm column was 60 mL/minute.

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770 pH = 10 purifications: Waters XBridge Cie 5 pm particle size, 19 x 100 mm column, eluting with mobile phase A; 0.15% NH4OH in water and mobile phase B: acetonitrile; the flow rate was 30 mL/minute, the separating gradient was optimized for each compound using the Compound Specific Method Optimization protocol as described in the literature [See Preparative LCMS Purification: Improved Compound Specific Method Optimization, K. Blom, B. Glass, R. Sparks, A. Combs, J. Comb. Chem., 6,874-883 (2004)]. Typically, toe flow rate used with 30 x 100 mm column was 60 mL/minute.

Example 1

N-{[2'-(2,6-difluoro-3^-dimethoxyphenyl)-3'-oxo-2'3'-dihydro-l’H-spiro[cycIopropanel^’-fZ^lnaphthyridinj-^’-yljmethylJacrylamide

Step 1: 4,6-dichloronicotinaldehyde

N Cl

To a stirred solution of 2,4-dichloro-5-carbetooxypyridine (10.0 g, 45.4 mmol) in methylene chloride (100.0 mL), diisobutylaluminum hydride in methylene chloride (50.0 mL, 1.0 M, 50.0 mmol) was added dropwise at -78°C. After 2 hours, toe reaction was quenched with a saturated solution of Rochelle's salt. After stirring for 12 hours, the aqueous solution was extracted with DCM (3x150 mL). The combined organic layers were dried overNa2SO4 and concentrated in vacuo to afford toe crude aldehyde (7.51 g, 42.9 mmol), which was used directly in toe next step without further purification. LC-MS calculated for C6H4CI2NO [M+H]⁺ m/z: 176.0; found 176.0.

Step 2: N-[(4,6-dichloropyridin-3-yl)methyl]-2,6-difluoro-3,5-dimethoxyaniline

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0025.tif" />

To a stirred solution of 2,6-difluoro-3,5-dimethoxyamline (9.03 g, 47.7 mmol), sodium triacetoxyborohydride (38.0 g, 180 mmol) in methylene chloride (60 mL) / trifluoroacetic acid (30 mL), 4,6-dichloronicotinaldehyde (8.00 g, 45.5 mmol) was added in small portions at room temperature. After 1 hour, the volatiles were removed in vacuo and saturated aqueous NaHCOa (200 mL) was added. The resulting mixture was extracted with DCM (3x150 mL). The organic layers were combined, dried over Na2SO4, and concentrated. The residue was purified on silica gel (eluting with 0 to 0-40% EtOAc in hexanes) to afford the desired product (15.0 g). LC-MS calculated for C14H13CI2F2N2O2 [M+H]⁺ m/z: 349.0; found 349.1.

Step 3: ethyl 3-[[(4,6-dichloropyridin-3-yl)methyl](2,6-difluoro-3,5dimethoxyphenyl)amino]-3-oxopropanoate

<img file="CA2976788C_D0026.tif" />

To a stirred solution of 7V-[(4,6-dicMoropyridm-3-yl)methyl]-2,6-difluoro-3,5dimethoxyaniline (3.50 g, 10.0. mmol) in tetrahydrofuran (20 mL), NaH (60% w/w in mineral oil, 421 mg, 10.5 mmol) was added at room temperature. After 10 minutes, ethyl malonyl chloride (1.92 mL, 15.0 mmol) was added dropwise. After another 1 hour, the reaction was quenched with saturated aqueous NH4CI, and extracted with DCM (3x100 mL). The organic layers were combined, dried over NaaSOi, and concentrated. The residue was purified on silica gel (eluting with 0 to 0-35% EtOAc in hexanes) to afford the desired product (4.20 g, 9.1 mmol). LC-MS calculated for C19H19CI2F2N2O5 [M+H]⁺ m/z: 463.1; found 463.1.

Step 4: Ethyl 6-chloro-2-(2,6-difluoro-3,5-dimethoxyphenyl)-3-oxo-l,2,3,4-tetrahydro-2,7naphthyridine-4-carboxylate

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0027.tif" />

To a stirred solution of ethyl 3-[[(4,6-dichloropyridin-3-yl)methyl](2,6-difluoro-3,5dimethoxyphenyl)amino]-3-oxopropanoate (1.50 g, 3.24 mmol) in DMF (15. mL), NaH (60% w/w in mineral oil, 337 mg, 8.42 mmol) was added at room temperature. The resulting mixture was then warmed up to 110 °C. After 5 hours, the reaction was cooled to room temperature, saturated aqueous NH4CI (50 mL) was added to form precipitate. After filtration, the solid was dried in vacuo to give crude cyclized product (0.95 g, 2.23 mmol). LC-MS calculated for C19H18CIF2N2O5 [M+H]⁺ m/z: 427.1; found 427.0.

Step 5: 6-chloro-2-(2,6-difluoro-3,5-dimethoxyphenyl)-l,2-dihydro-2,7-naphthyridin-3(4H)one

<img file="CA2976788C_D0028.tif" />

To a stirred solution of ethyl 6-chloro-2-(2,6-difluoro-3,5-dimethoxyphenyl)-3-oxol,2,3,4-tetrahydro-2,7- naphthyridine-4-carboxylate(0.95 g, 2.23 mmol) in 1,4-dioxane (5 mL) hydrogen chloride (4.0 M in dioxane, 2 mL, 8 mmol) was added at room temperature. The resulting mixture was warmed up to 100 °C. After 4 hours, the reaction was cooled to ambient temperature, quenched with saturated aqueous NaHCOs, and extracted with DCM (3x100 mL). The organic layers were combined, dried over Na2SO4, and concentrated. The residue was purified on silica gel (eluting with 0 to 0-30% EtOAc in DCM) to afford the desired product (0.75 g, 2.12 mmol). LC-MS calculated for C16H14CIF2N2O3 [M+H]⁺ m/z: 355.1; found 355.1.

Step 6: 6'-chloro-2'-(2,6-difluoro-3,5-dimethoxyphenyl)-l 2’-dihydro-3’Hspiro[cyclopropane-l,4'-[2,7]naphthyridin]-3'-one

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

<img file="CA2976788C_D0029.tif" />

To a stirred solution of 6-chloro-2-(2,6-difluoro-3,5-dimethoxyphenyl)-l,4-dihydro2,7-naphthyridin-3(2//)-one (1.50 g, 4.23 mmol) in DMF (10 mL), cesium carbonate (3.03 g, 9.30 mmol) and 1 -bromo-2-chloro-ethane (701 pL, 8.46 mmol) were added sequentially at room temperature. After 5 hours, the reaction was quenched with saturated aqueous NH4CI, and extracted with DCM (3x75 mL). The organic layers were combined, dried over Na2SO₄, and concentrated. The residue was purified on silica gel (eluting with 0 to 0-50% EtOAc in hexanes) to afford the desired product (1.20 g, 3.15 mmol). LC-MS calculated for C18H16CIF2N2OÎ [M+H]⁺m/z: 381.1; found 381.1.

Step 7: 2’-(2,6-difluoro-3,5-dimethoxyphenyl)-3'-oxo-2’,3’-dihydro-rH-spiro[cyclopropanel,4'-[2,7]naphthyridme]-6’-carbcmitrile

<img file="CA2976788C_D0030.tif" />

A reaction mixture of 6'-chloro-2'-(2,6-difluoro-3,5-dimethoxyphenyl)-l',2'-dihydro3H-spiro[cyclopropane-l,4'-[2,7]naphthyridin]-3’-one (0.40 g, 1.0 mmol), zinc cyanide (0.12 g, 1.0 mmol) and [l,r-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complexed with dichloromethane (1:1) (86 mg, 0.10 mmol) in Ν,Ν-dimethylformamide (6.9 mL) was stirred at 130°C under an atmosphere of N2 for 6 hours. The reaction was quenched with saturated aqueous NaHCOs, and extracted with ethyl acetate (3 x 20 mL). The combined organic layers were washed with brine, dried over MgSO₄, filtered and concentrated under reduced pressure. The residue was purified on silica gel (eluting with 0 to 0-20% EtOAc in DCM) to afford the desired product (0.28 g). LC-MS calculated for C19H16F2N3O3 [M+H]⁺m/z: 372.1; found 372.1.

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

Step 8: 6’-(aminomethyl)-2'-(2,6-difluoro-3,5-dimethoxyphenyl)-l ',2’-dihydro-3'Hspiro[cyclopropane-1,4 '-[2,7]naphthyridin]-3 '-one

<img file="CA2976788C_D0031.tif" />

To a stirred solution of 2'-(2,6-difluoro-3,5-dimethoxyphenyl)-3'-oxo-2',3'-dihydrolH-spiro[cyclopropane-l,4'-[2,7]naphthyridine]-6‘-carbonitrile (99.9 mg, 0.269 mmol) in THF (5 mL), diisobutylaluminum hydride (1.0 M in toluene, 0.54 mL, 0.54 mmol) was added at -78°C. After 2 hours, the reaction mixture was quenched with saturated aqueous NH4CI, and extracted with ethyl acetate (3x 20 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified on prep-HPLC (pH = 2, acetonitrile/water+TFA) to give the desired product (15 mg) as its TFA salt. LC-MS calculated for C19H20F2N3O3 [M+H]⁺ m/z: 376.2; found 376.1.

Step 9: N-{[2'-(2,6-difluoro-3,5-dimethoxyphenyl)-3'-oxo-2',3'-dihydro-rHspiro[cyclopropane-1,4 '-[2,7]naphthyridin]-6'-yl]methyl}acrylamide

To a stirred solution of 6'-(aminomethyl)-2'-(2,6-difluoro-3,5-dimethoxyphenyl)-r,2'dihydro-3'H-spiro[cyclopropane-l,4'-[2,7]naphthyridin]-3'-one (25.5 mg, 0.068 mmol) in methylene chloride (4.0 mL), N,N-diisopropylethylamine (46 pL, 0.27 mmol) and 2propenoyl chloride (5.8 pL, 0.072 mmol) were added sequentially at room temperature. After 3 minutes, the reaction was quenched with saturated aqueous NH4CI, extracted with methylene chloride. The combined organic layers were dried over NazSOt, filtered, and concentrated to dryness under reduced pressure. The crude product was purified on prepHPLC (pH = 2, acetonitrile/water+TFA) to give the desired product (15 mg) as its TFA salt. LCMS calculated for C22H22F2N3O4 [M+H]⁺ m/z: 430.2; Found: 430.1. ‘H NMR (500 MHz, DMSO-ds): δ 8.63 (1, J = 5.6 Hz, 1H), 8.40 (s, 1H), 7.07 (t, J= 8.2 Hz, 1H), 6.97 (s, 1H), 6.31 (dd, J= 17.1,10.2 Hz, 1H), 6.11 (dd, J= 17.1,2.1 Hz, 1H), 5.62 (dd, J= 10.2,2.1 Hz, 1H), 4.95 (s, 2H), 4.43 (d, J=5.8 Hz, 2H), 3.89 (s, 6H), 1.76 (q, J= 3.9 Hz, 2H), 1.46 (q, J= 4.0 Hz, 2H).

Example 2

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-2-oxo-l,2,3,4-tetrahydropyrido[4,3d]pyi*imidin-7-yl)methyl)acrylainide

<img file="CA2976788C_D0032.tif" />

Step J: 7-chloro-3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-3,4-dihydropyrtdo[4,3d]pyrimidin-2(lH)-one

<img file="CA2976788C_D0033.tif" />

To a solution of triphosgene (344 mg, 1.16 mmol) in CH2CI2 (12 mL, 190 mmol) at 0 °C was first added pyridine (0.250 mL, 3.09 mmol). The reaction mixture was then stirred at 0 °C for 10 minutes, followed by the addition of a solution of JV-[(4,6-didiloropyridin-3yl)methyl]-2,6-difluoro-3,5-dirnethoxyaniline (prepared as in Example 1, Step 2, 900 mg, 2.58 mmol) in CH2CI2 (8.0 mL). The reaction mixture was stirred at 0 °C for 1 hour, after which time ethylamine in THF (2.0 M, 6.4 mL, 13 mmol) was added to the reaction mixture; followed by the addition of /VJV-diisopropylethylamine (920 pL, 5.3 mmol). The resulting mixture was then warmed to room temperature, stirred overnight, quenched with saturated NaHCOs (aqueous solution), and extracted with EtOAc (3 x 20 mL). The combined organic layers were dried over NazSOi and concentrated to give the crude intermediate 1-((4,6dichloropyridin-3-yl)methyl)-l-(2,6-difluoro-3,5-dimethoxyphenyl)-3-ethylurea. The crude intermediate was first dissolved in DMF (20 mL), followed by the addition of CS2CO3 (1.70 g, 5.2 mmol). The reaction mixture was then stirred at 95 °C for 5 hours until completion, cooled to room temperature, quenched with water, and extracted with EtOAc (3 x 20 mL). The combined organic layers were dried over NazSOi, and concentrated. The resulting material was purified via column chromatography (25% to 55% EtOAc in hexanes) to give the product as a slightly yellow solid. LC-MS calculated for C17H17QF2N3O3 [M+H]⁺ m/z: 384.1; found 384.1.

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

Step 2: 3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl- 7-vinyl-3,4-dihydropyrido[4,3d]pyrimidin-2(lH)-one

<img file="CA2976788C_D0034.tif" />

A mixture of7-chloro-3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-3,4dihydropyrido[4,3-d]pyrimidin-2(lH)-one (460 mg, 1.20 mmol), 4,4,5,5-tetramethyl-2-vinyl1,3,2-dioxaborolane (240 pL, 1.4 mmol), tetrakis(triphenylphosphine)palladium(0) (0.08 g, 0.07 mmol) and potassium carbonate (0.66 g, 4.8 mmol) in 1,4-dioxane (12 mL) and water (4.3 mL) was stirred at 120 °C overnight. The reaction was quenched with saturated aqueous NaHCOî, and extracted with ethyl acetate (3 x 20 mL). The combined organic layers were washed with brine, dried over MgSO», filtered and concentrated under reduced pressure. The residue was purified on silica gel (eluting with 0 to 0-40% EtOAc in hexanes) to afford the desired product. LC-MS calculated for C19H20F2N3O3 [M+H]* m/z: 376.1; found 376.1.

Step 3: 3-(2,6-dtfluoro-3,5-dimethoxyphenyl)-l-ethyl-2-oxo-1,2,3,4-tetrahydropyrido[4,3d]pyrimidine- 7-carbaldehyde

<img file="CA2976788C_D0035.tif" />

To a solution of 3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-7-vmyl-3,4dihydropyrido[4,3-d]pyrimidin-2(lH)-one (0.32 g, 0.85 mmol) in 1,4-dioxane (10 mL) and water (5 mL) was added osmium tetraoxide (0.81 mL, 4% w/w, 0.13 mmol) at room temperature. The reaction mixture was stirred for 5 minutes then sodium periodate (0.547 g, 2.56 mmol) was added. The reaction mixture was stirred at room temperature for 1 hour, then diluted with water and extracted with EtOAc. The combined extracts were washed with water and brine, dried over MgSÛ4, filtered and concentrated under reduced pressure. The residue was used in the next step without further purification.

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

Step 4: (E)-3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-2-oxo-l, 2,3,4-tetrahydropyrido[4,3d]pyrimidine-7-carbaldehyde oxime

<img file="CA2976788C_D0036.tif" />

Hydroxylamine hydrochloride (0.21 g, 3.0 mmol) was added to a slurry of crude 3(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-2-oxo-l,2,3,4-tetrahydropyrido[4,3d]pyrimidine-7-carbaldehyde (0.31 g, 0.80 mmol) and potassium carbonate (0.12 g, 0.85 mmol) in methanol (6 mL) at room temperature. The resulting mixture was stirred at 70 °C for 1 hour. The volatiles were removed and the residue was diluted with ethyl acetate (20 mL). The organic layer was washed with saturated aqueous NaHCOî solution, brine, dried over MgSO«, filtered and concentrated under reduced pressure. The crude product was used directly in the next step. LC-MS calculated for C18H19F2N4O4 [M+H]⁺ m/z: 393.1; found 393.1.

Step 5: 7-(aminomethyl)-3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-3,4dihydropyridof4,3-d]pyrimidin-2(lH)-one

<img file="CA2976788C_D0037.tif" />

Zinc (440 mg, 6.8 mmol) was added in several portions to a solution of crude (E)-3(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-2-oxo-l,2,3,4-tetrahydropyrido[4,3d]pyrimidine-7-carbaldehyde oxime (0.30 g, 0.76 mmol) in acetic acid (3 mL) at room temperature. The resulting reaction mixture was stirred at room temperature for 1 hour. The reaction was quenched with saturated aqueous NaHCOî, and extracted with ethyl acetate (3x 20 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated under reduced pressure. Hydrogen chloride (0.54 mL, 4.0 M in 1,4-dioxane, 2.2 mmol) was added to the residue. The mixture was concentrated in vacuo to afford the

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 crude product (0.30 g) as its HCl salt. LC-MS calculated for C18H21F2N4O3 [M+H]⁺ m/z: 379.2; found 379.1.

Step 6: N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-ethyl-2-oxo-l,2,3,4tetrahydropyrido[4,3-d]pyrimidin-7-yl)methyl)acrylamide

To a stirred solution of crude 7-(aminomethyl)-3-(2,6-&lt;iifluoro-3_&gt;5-dimethoxyphenyl)l-ethyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(lH)-one (0.28,0.74 mmol) and triethylamine (350 pL, 2.5 mmol) in acetonitrile (5 mL), 2-propenoyl chloride (70 pL, 0.86 mmol) was added at room temperature. After 30 minutes, the reaction mixture was diluted with MeOH and was purified by RP-HPLC (pH = 2) to afford the desired product as its TFA salt. LC-MS calculated for C21H23F2N4O4 [M+H]⁺ m/z: 433.2; found 433.1. ‘H NMR (500 MHz, DMSOde): δ 8.87 (s, 1H), 8.38 (s, 1H), 7.33 (s, 1H), 7.08 (t, J= 8.2 Hz, 1H), 6.32 (dd, J= 17.1,10.2 Hz, 1H), 6.15 (dd, J= 17.1, 2.0 Hz, 1H), 5.68 (dd, J= 10.2, 2.0 Hz, 1H), 4.84 (s, 2H), 4.57 (d, J= 5.6 Hz, 2H), 3.92 (q, J = 5.0 Hz, 2H), 3.89 (s, 6H), 1.18 (t, 7.0 Hz, 3H).

Example 3

N-((3-(2,6-dinuoro-3^-dimethoxyphenyl&gt;2-oxo-l-(pyridin-3-yl)-1^3,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0038.tif" />

Step 1: N-((4-chloro-6-vinylpyridm-3-yl)methyl)-2,6-difluoro-3,5-dimethoxyaniline

<img file="CA2976788C_D0039.tif" />

A mixture of N-[(4,6-dichloropyridin-3-yl)methyl]-2,6-difluoro-3,5-dimethoxyaniline (prepared as in Example 1, Step 2,2.00 g, 5.73 mmol), 4,4,5,5-tetramethyl-2-vinyl-l,3,2dioxaborolane (0.98 mL, 5.8 mmol), tetrakis(triphenylphosphine)palladium(0) (0.4 g, 0.3 mmol) and potassium carbonate (3.2 g, 23 mmol) in 1,4-dioxane (10 mL) and water (2.0.

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 mL) was stirred at 120 °C overnight. The reaction mixture was quenched with saturated aqueous NaHCOs, and extracted with ethyl acetate (3x100 mL). The combined organic layers were washed with brine, dried over MgSO«, filtered and concentrated under reduced pressure. The residue was purified on silica gel (eluting with 0 to 0-25% EtOAc in hexanes) to afford the desired product (1.3 g). LC-MS calculated for C16H16CIF2N2O2 [M+H]⁺ m/z: 341.1;

found 341.1.

Step 2: 3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-(pyridin-3-yl)-7-vinyl-3,4-dihydropyrido[4,3d]pyrimidin-2(lH)-one

<img file="CA2976788C_D0040.tif" />

To a stirred solution of N-[(4-chloro-6-vinylpyridin-3-yl)methyl]-2,6-difluoro-3,5dimethoxyaniline (100.0 mg, 0.2935 mmol), palladium acetate (6.6 mg, 0.029 mmol), (R)(+)-2,2'-bis(diphenylphosphino)-l,r-binaphthyl (18 mg, 0.029 mmol), and cesium carbonate (290 mg, 0.89 mmol) in 1,4-dioxane (6 mL, 80 mmol) was added 3-pyridinamine (39 mg, 0.41 mmol). The resulting mixture was stirred at 130 °C overnight under the atmosphere of N2. After cooling to room temperature, the reaction mixture was diluted with ethyl acetate, filtered and concentrated under reduced pressure. The crude N-(5-(((2,6-difluoro-3,5dimethoxyphenyl)amino)methyl)-2-vinylpyridm-4-yl)pyridin-3-amine was used without further purification. LC-MS calculated for C21H21F2N4O2 [M+H]⁺ m/z: 399.2; found 399.2.

Triphosgene (87 mg, 0.29 mmol) was added to a solution of the crude N-(5-(((2,6difluoro-3,5-dimethoxyphenyl)amino)methyl)-2-vinylpyridin-4-yl)pyridin-3-amine and N,Ndiisopropylethy lamine (310 pL, 1.8 mmol) in tetrahydrofuran (5 mL) at 0 °C. After 15 minutes, the reaction was quenched with saturated aqeuous NaHCOj, diluted with EtOAc. The organic layer was separated and washed with water, dried over NazSO4, filtered and concentrated in vacuo to afford the desired product, which was used directly in the next step without further purification. LC-MS calculated for C22H19F2N4O3 [M+H]⁺ m/z: 425.2; found 425.2.

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

Step 3: N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-(pyridin-3-yl)-l, 2,3,4tetrahydropyrido[4,3-d]pyrimidin- 7-yl)methyl)acrylamide

The title compound was prepared using procedures analogous to those described for Example!, Steps 3 to 6, with 3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-(pyridin-3-yl)-7-vinyl3,4-dihydropyrido[4,3-d]pyrimidin-2(lH)-one replacing 3-(2,6-difluoro-3,5dimethoxyphenyl)-l-elhyl-7-vniyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(lH)-one in step 3. LCMS calculated for C24H22F2N5O4 [M+H]⁺ m/z: 482.2; Found: 482.2.

Example 4

N-((6'-(2,6-difluoro-34-dimethoxyphenyl)-7*-oxo-6'_&gt;7'-dihydr&lt;&gt;-5*H-spiro[cyclopropane14'-pyrido(44-d]pyrimidine]-2’-yl)methyl)acrylamide

<img file="CA2976788C_D0041.tif" />

o

Step 1: 2,4-dichloro-5-(chloromethyl)pyrimidine

<img file="CA2976788C_D0042.tif" />

To a stirred solution of 5-(hydroxymethyl)uracil (5.0 g, 35 mmol) in phosphoryl chloride (25 mL, 270 mmol) and toluene (6.0 mL), N,N-diisopropylethylamine (26 mL, 150 mmol) was added dropwise at room temperature. The resulting solution was heated at 110 °C overnight. After being cooled to room temperature, the reaction mixture was concentrated under reduced pressure, diluted with IN HC1 (100 mL) and water (200 mL), and was extracted with DCM. The organic layers were combined, dried over NazSCX filtered and concentrated. The residue was purified on silica gel (eluting with 0-40% EtOAc in DCM) to give 6.4 g of flte desired product. LCMS calculated for C5H4CI3N2 [M+H]⁺ m/z: 196.9; Found: 197.0.

Step 2: 2,4-dichloro-5-(iodomethyl)pyrimidine

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

Cl

N hi^CI

To a stirred solution of 2,4-dichloro-5-(chloromethyl)pyrimidme (1.50 g, 7.60 mmol) in acetone (10 mL), sodium iodide (1.20 g, 7.98 mmol) was added at room temperature. After stirring for 5 hours, the reaction mixture was filtered and the solid was washed with acetone. The filtrate and washed solution were combined and concentrated. The residue was purified on silica gel (eluting with 0-40% EtOAc in hexanes) to give 1.5 g of the desired product. LCMS calculated for CSH4CI2IN2 [M+H]⁺ m/z: 288.9; Found: 288.8.

Step 3: N-[(2,4-dichloropyrimidin-5-yl)methyl]-2,6-difluoro-3,5-dimethoxyaniline ci ^F tÀ

A mixture of 2,4-dichloro-5-(iodomethyl)pyrimidine (1.50 g, 5.19 mmol), 2,6difluoro-3,5-dimethoxyaniline (1.08 g, 5.71 mmol) in Ν,Ν-diisopropylethylamine (4 mL) was stirred at 80 °C for 2 hours. After being cooled to room temperature, the reaction mixture was concentrated under reduced pressure. The residue was purified on silica gel (eluting with 040% EtOAc in DCM) to give 1.70 g of the desired product. LCMS calculated for C13H12CI2F2N3O2 [M+H]⁺ m/z: 350.0; Found: 350.0.

Step 4: ethyl 3-(((2,4-dichloropyrimidin-5-yl)methyl)(2,6-difluoro-3,5dimethoxyphenyl)amino)-3-oxopropanoate

<img file="CA2976788C_D0043.tif" />

The title compound was prepared using procedures analogous to those described for

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

Example 1, Step 3, with N-[(2,4-dichloropyrimidin-5-yl)methyl]-2,6-difluoro-3,5dimethoxyaniline replacing N-[(4,6-dichloropyridin-3-yl)methyl]-2,6-difluoro-3,5dimethoxyaniline. LCMS calculated C18H18CI2F2N3OÎ [M+H]⁺ m/z: 464.1; Found: 464.0.

Step 5: ethyl 2-chloro-6-(2,6-difluoro-3,5-dimethoxyphenyl)-7-oxo-5,6,7,8tetrahydropyrido[4,3-d]pyrimidine-8-carboxylate

<img file="CA2976788C_D0044.tif" />

A mixture of ethyl 3-[[(2,4-dichloropyrimidin-5-yl)methyl](2,6-difluoro-3,5dimethoxyphenyl)amino]-3-oxopropanoate (1.2 g, 2.6 mmol) and 2-(tert-butylimino)-N,Ndiethyl-l,3-dimethyl-l,3,2X(5)-diazaphosphinan-2-amine (1.5 mL, 5.17 mmol) in methylene chloride (6 mL) was stirred at room temperature for 2 hours. The reaction mixture was concentrated under reduced pressure and the residue was purified on silica gel (eluting with 0-40% EtOAc in DCM) to give 0.88 g of the desired product. LCMS calculated for C18H17CIF2N3OS [M+H]⁺ m/z: 428.1; Found: 428.0.

Step 6: 2-chloro-6-(2,6-difluoro-3,5-dimethoxyphenyl)-5,8-dihydropyrido[4,3-d]pyrimidin7(6H)-one

<img file="CA2976788C_D0045.tif" />

The title compound was prepared using procedures analogous to those described for Example 1, Step 5, with ethyl 2-chloro-6-(2,6-difluoro-3,5-dimethoxyphenyl)-7-oxo-5,6,7,8tetrahydropyrido[4,3-d]pyrimidine-8-carboxylate replacing 6-d»loro-2-(2,6-difluoro-3,5dimethoxyphenyl)-3-oxo-l,2,3,4-tetrahydro-2,7-naphthyridine-4-carboxylate. LCMS calculated C15H13CIF2N3O3 [M+H]⁺ m/z: 356.1; Found: 356.1.

Step 7: 2'-chloro-6'-(2,6-difluoro-3,5-dimethoxyphenyl)-5’, 6'-dihydro-7'H61

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770 spirofcyclopropane-1,8'-pyrido[4,3-d]pyrimidln]-7'-one

<img file="CA2976788C_D0046.tif" />

The title compound was prepared using procedures analogous to those described for

Example 1, Step 6, with 2-chloro-6-(2,6-difluoro-3,5-dimethoxyphenyl)-5,8dihydropyrido[4,3-d]pyrimidin-7(6H)-one replacing 6-chloro-2-(2,6-difluoro-3,5dimethoxyphenyl)-l,4-dihydro-2,7-naphthyridin-3(2J/)-one. LCMS calculated

C17H15CIF2N3O3 [M+H]⁺m/z: 382.1; Found: 382.0.

Step 8: N-((6'-(2,6-difluoro-3,5-dimethoxyphenyl)-7'-oxo-6&gt;', 7’-dihydro-5'Hspiro[cyclopropane-l,8’-pyrido[4,3-d]pyrimidine]-2’-yl)methyl)acrylamide

The title compound was prepared using procedures analogous to those described for Example 2, Steps 2 to 6, with 2'-chloro-6'-(2,6-difluoro-3,5-dimethoxyphenyl)-5',6'-dihydro7'H-spiro[cyclopropane-l ,8'-pyrido[4,3-d]pyrimidin]-7'-one replacing 7-chloro-3-(2,6difluoro-3,5-dimethoxyphenyl)-l -ethyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(lH)-one in step 2. LCMS calculated for C21H21F2N4O4 [M+H]⁺ m/z: 431.2; Found: 431.1.

Example S

N-iiZ’-iZ^difluoro-S^-dimethoxyphenyll-S'-oxo-Z’^’-dihydro-l’H-spirolcyclopentane l,4’-[2,7]naphthyridine]-6'-yI)metiiyl)acrylamide

<img file="CA2976788C_D0047.tif" />

Step 1: 6'-chloro-2'-(2,6-difluoro-3,5-dimethoxyphenyl)-l 'H-spiro[cyclopentane-l, 4'[2,7]naphthyridin]-3'(2'H)-one

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0048.tif" />

The title compound was prepared using procedures analogous to those described for Example 1, Step 6, with 1,4-dibromobutane replacing l-bromo-2-chloro-ethane. LCMS calculated for C20H20CIF2N2O3 [M+H]⁺ m/z: 409.1; Found: 409.1.

Step 2: N-((2'-(2,6-difluoro-3,5-dimethoxyphenyl)-3’-oxo-2',3'-dihydro-rHspiro[cyclopentane-l,4'-[2,7]naphthyridine]-6'-yl)methyl)acrylamide

The title compound was prepared using procedures analogous to those described for Example 2, Steps 2 to 6, with 6'-chloro-2'-(2,6-difluoro-3,5-dimethoxyphenyl)-rH-spiro[cyclopentanel,4'-[2,7]naphthyridin]-3^,(2'H)-one replacing 7-chloro-3-(2,6-difluoro-3,5-dimethoxyphenyl)l-ethyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(lH)-one in step 2. LCMS calculated for C24H26F2N3O4 [M+H]⁺ m/z: 458.2; Found: 458.2. ^bH NMR (600 MHz, DMSO) δ 8.74 (t, J= 5.7 Hz, 1H), 8.50 (s, 1H), 7.36 (s, 1H), 7.07 (t, J= 8.1 Hz, 1H), 6.34 (dd, J= 17.1,10.3 Hz, 1H), 6.15 (dd, J= 17.1,2.0 Hz, 1H), 5.65 (dd, J= 10.3,2.0 Hz, 1H), 4.87 (s, 2H), 4.51 (d, J= 5.9 Hz, 2H), 3.90 (s, 6H), 2.38 (dt, J= 14.4,7.4 Hz, 2H), 1.98 (dt, J= 12.3,6.4 Hz, 2H), 1.87 -1.73 (m, 4H).

Example 6

N-((3-(2,6-dinuoro-3,S-dimethoxyphenyl)-2-oxo-l-phenyl-1^3yl-tetrahydropyrido[43

d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0049.tif" />

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

The title compound was prepared using procedures analogous to those described for Example 3, with aniline replacing 3-pyridinamine in Step 2. LCMS calculated for C25H23F2N4O4 [M+H]⁺ m/z: 481.2; Found: 481.2.

Example 7

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-(l-methyl-lH-pyrazol-3-yl)-2-oxol»23»4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0050.tif" />

The title compound was prepared using procedures analogous to those described for Example 3, with l-methyl-lH-pyrazol-3-amine replacing 3-pyridinamine in Step 2. LCMS calculated for C23H23F2N6O4 [M+H]⁺ m/z: 485.2; Found: 485.2.

Example 8 (S)-N-((3-(2,6-difluoro-3^-dimethoxyphenyl)-2-oxo-l-(tetrahydrofuran-3-yl )-1^3,4tetrahydropyrido|43-d]pyrimidin-7-yl)methyl)acry!amide

<img file="CA2976788C_D0051.tif" />

The title compound was prepared using procedures analogous to those described for Example 3, with (S)-tetrahydrofuran-3-amine replacing 3-pyridinamine in Step 2. LCMS calculated for C23H2ÎF2N4O5 [M+H]⁺ m/z: 475.2; Found: 475.1.

Example 9

N-((3-(2,6-dinuoro-3,5-dimethoxyphenyl)-l-(3,3-difluorocyclobutyl)-2-oxo-l,2r$»4tetrahydropyrido[4,3-d]pyrimidin-7-yl)methyl)acrylamide

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0052.tif" />

The title compound was prepared using procedures analogous to those described for Example 3, with 3,3-difluorocyclobutanamine replacing 3-pyridinamine in Step 2. LCMS calculated for C23H23F4N4O4 [M+H]⁺ m/z: 495.2; Found: 495.2.

Example 10

N-((l-cyclopropyl’3’(2^'difluoro-3,5’dimethoxyphenyl&gt;’2-oxo-l»2^,4’ tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0053.tif" />

The title compound was prepared using procedures analogous to those described for

Example 2, with cyclopropanamine replacing ethylamine in Step 1. LCMS calculated for C22H23F2N4O4 [M+H]⁺ m/z: 445.2; Found: 445.2.

Example 11

N-((3-(2,6-difluoi*o-3,5-dimethoxyphenyl)-l-(2-methoxyethyl)-2-oxo-l,2,3,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0054.tif" />

o

The title compound was prepared using procedures analogous to those described for Example 2, with 2-methoxyethanamine replacing ethylamine in Step 1. LCMS calculated for

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

C22H25F2N4O5 [M+H]⁺ m/z: 463.2; Found: 463.2. Ή NMR (500 MHz, DMSO-ùfc): Ô 8.83 (t, J= 5.7 Hz, 1H), 8.35 (s, 1H), 7.36 (s, 1H), 7.07 (t, J= 8.2 Hz, 1H), 6.33 (dd, J= 17.1,10.2 Hz, 1H), 6.15 (dd, J= 17.1,2.0 Hz, 1H), 5.68 (dd, J= 10.2,2.0 Hz, 1H), 4.82 (s, 2H), 4.52 (d, J = 5.8 Hz, 2H), 4.06 (t, J= 5.6 Hz, 2H), 3.89 (s, 6H), 3.55 (t, J= 5.6 Hz, 2H), 3.22 (s, 3H).

Example 12

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-propyl-l,2,3j4-tetrahydropyrido[4,3d]pyrimidin-7-yl)methyI)acryIamide

<img file="CA2976788C_D0055.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with propan-l-amine replacing ethylamine in Step 1. LCMS calculated for C22H25F2N4O4 [M+H]⁺ m/z: 447.2; Found: 447.2.

Example 13

N-((l-(cyclopropylmethyl)-3-(2,6-difluoro-3,5-dimethoxyph«iyl)-2-oxo-1^3,4tetrahydropyrido[4^-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0056.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with cyclopropylmethanamine replacing ethylamine in Step 1. LCMS calculated for C23H25F2N4O4 [M+H]⁺ m/z: 459.2; Found: 459.1.

Example 14

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-(2,2-difluoroethyl)-2-oxo-l,23»4tetrahydropyrido[43-d]pyrimidin-7-yl)metliyl)acrylainide

<img file="CA2976788C_D0057.tif" />

The title compound was prepared using procedures analogous to those described for 5 Example 2, with 2,2-difluoroethanamine replacing ethylamine in Step 1. LCMS calculated for C21H21F4N4O4 [M+H]⁺ m/z: 469.2; Found: 469.1.

Example 15

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-isopropyl-2-oxo-133»410 tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0058.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with propan-2-amine replacing ethylamine in Step 1. LCMS calculated for C22H25F2N4O4 [M+H]⁺ m/z: 447.2; Found: 447.2

Example 16

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-(3-fluorobenzyI)-*2-oxo~l,23,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0059.tif" />

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

The title compound was prepared using procedures analogous to those described for Example 2, with (3-fluorophenyl)methanamine replacing ethylamine in Step 1. LCMS calculated for C26H24F3N4O4 [M+H]⁺ m/z: 513.2; Found: 513.2

Example 17

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-(pyridin-3-ylmethyl)-l,23,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0060.tif" />

The title compound was prepared using procedures analogous to those described for 10 Example 2, with pyridin-3-ylmethanamine replacing ethylamine in Step 1. LCMS calculated for C25H24F2N5O4 [M+H]⁺ m/z: 496.2; Found: 496.2

Example 18

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-((l-methyl-lH-pyrazol-4-yl)methyl)-2-oxo15 1^33-tetrahydropyrido[43*d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0061.tif" />

o

The title compound was prepared using procedures analogous to those described for Example 2, with pyridin-3-ylmethanamine replacing ethylamine in Step 1. LCMS calculated for C24H2SF2N6O4 [M+H]⁺ m/z: 499.2; Found: 499.2

Example 19 (R)-N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-((tetrahydrofuran-3-yl)metiiyl)l,2,3,4-tetrahydropyrido[43-dlpyrimidin-7-yl)methyl)acrylamide

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0062.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with (R)-(tetrahydrofuran-3-yl)methanamine replacing elhylamine in Step 1. LCMS calculated for C24H27F2N4O5 [M+H]⁺ m/z: 489.2; Found: 489.2

Example 20

N-((l-(cyanomethyl)’3’(2,6-difluoro-3_&gt;5-dimethoxyphenyl)-2-oxo-1^3!4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0063.tif" />

o

The title compound was prepared using procedures analogous to those described for

Example 2, with 2-aminoacetonitrile replacing ethylamine in Step 1. LCMS calculated for C21H20F2N5O4 [M+H]⁺ m/z: 444.2; Found: 444.2

Example 21

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-(2,2,2-trifluoroethyl)-1,2,3,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0064.tif" />

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

The title compound was prepared using procedures analogous to those described for Example 2, with 2,2,2-trifluoroethanamine replacing ethylamine in Step 1. LCMS calculated for C21H20F5N4O4 [M+H]⁺ m/z: 487.1; Found: 487.1

Example 22

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-methyl-2-oxo-l,23&gt;4-tetrahydropyrido[4,3d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0065.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with methylamine replacing ethylamine in Step 1. LCMS calculated for C20H21F2N4O4 [M+H]⁺ m/z: 419.2; Found: 419.1

Example 23

N-((3-(2,6-difluoro-3,5-dimethoxyphenyi)-2-oxo-l-(tetrahydro-2H-pyran-4-yl)-1,2,3,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0066.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with tetrahydro-2H-pyran-4-amine replacing ethylamine in Step 1. LCMS calculated for C24H27F2N4O5 [M+H]⁺ m/z: 489.2; Found: 489.2

Example 24

N-i(7-(2,6-difluoro-3,5-diinethoxyphenyl)-5,5-dimethyl-6-oxo-5,6,7,8-tetrahydro-2,7naphthyridin-3-yl)methyl)acrylamide

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0067.tif" />

Ο

The title compound was prepared using procedures analogous to those described for Example 1, with methyl iodide replacing l-bromo-2-chloro-ethane in Step 6. LCMS calculated for C22H24F2N3O4 [M+H]⁺ m/z: 432.2; Found: 432.2

Example 25

N-((l-cyclobutyl-3-(2,6-difluoro-3^-dimethoxyphenyl)-2-oxo-1,2,3,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0068.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with cyclobutylamine replacing ethylamine in Step 1. LCMS calculated for C23H25F2N4O4 [M+H]⁺ m/z: 459.2; Found: 459.1. Ή NMR (500 MHz, dmso) δ 8.82 (t, J = 5.8 Hz, 1H), 8.38 (s, 1H), 7.05 (t, J= 8.1 Hz, 1H), 6,98 ($, 1H), 6,33 (dd, J= 17.1, 10,2 Hz, 1H), 6.14 (dd, J= 17.1, 2.0 Hz, 1H), 5.67 (dd, J= 10.2,2.0 Hz, 1H), 4.73 (s, 2H), 4.50 (d, J= 5.9 Hz, 2H), 4.45 - 4.38 (m, 1H), 3.88 (s, 6H), 2.49 (m, 2H), 2.18 - 2.05 (m, 2H), 1.77 - 1.69 (m,2H).

Example 26

N-((3-(2,6-difluoro-3,5-dimethoxyphenyI)-2-oxo-l-(pyridin-4-yl)-l,2,3,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

<img file="CA2976788C_D0069.tif" />

The title compound was prepared using procedures analogous to those described for Example 3, with 4-aminopyridine replacing 3-pyridinamine in Step 2. LCMS calculated for C24H22F2N5O4 [M+H]⁺ m/z: 482.2; Found: 482.1

Example 27

N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-(2-fluoroethyl)-2-oxo-l,23»4tetrahydropyrido[43-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0070.tif" />

The title compound was prepared using procedures analogous to those described for

Example 2, with 2-fluoroethylamine hydrochloride replacing ethylamine in Step 1. LCMS calculated for C21H22F3N4O4 [M+H]⁺ m/z: 451.2; Found: 451.1

Example 28

N-((l-cydopentyl-3-(2,6-difluoro-3^-d)inethoxyphenyl)-2-oxo-1^3,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyI)acrylamide

<img file="CA2976788C_D0071.tif" />

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

The title compound was prepared using procedures analogous to those described for Example 3, with cyclopentylamine replacing 3-pyridinamine in Step 2. LCMS calculated for C24H27F2N4O4 [M+H]⁺ m/z: 473.2; Found: 473.1

Example 29

N-((3-(2,6-difluoro-3,5-dimetiioxyphenyl)-l-isobutyl-2-oxo-1^3,4-tetrahydropyrido[43d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0072.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with 2-methylpropan-l-amine replacing ethylamine in Step 1. LCMS calculated for C23H27F2N4O4 [M+H]⁺ m/z: 461.2; Found: 461.2

Example 30

N-((l-(cyclobutylmethyl)-3-(2,6-difluoro-3^-dimethoxyphenyl)-2-oxo-l,23,4tetrahydropyrido[43-d]pyrimidin-7-yl)methyI)acrylamide

<img file="CA2976788C_D0073.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with cyclobutylmethanarmne replacing ethylamine in Step 1. LCMS calculated for C24H27F2N4O4 [M+H]⁺ m/z: 473.2; Found: 473.2

Example 31 (S)-N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-((tetrahydrofuran-3-yl)inethyl)l,2,3,4-tetrahydropyrido[4,3-d]pyrimidin-7-yi)niethyl)acrylaniide

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

<img file="CA2976788C_D0074.tif" />

The title compound was prepared using procedures analogous to those described for Example 2, with (S)-(tetrahydrofijran-3-yl)methanamine replacing ethylamine in Step 1.

LCMS calculated for C24H27F2N4O5 [M+H]⁺ m/z: 489.2; Found: 489.2

Example 32

N-((3-(2,6-difluoro-34-dimethoxyphenyl)-l-((l-methylpiperidin4-yl)methyl&gt;2-oxo144,4-tetrahydropyrido[4,3-dJpyrimidin-7-yl)methyl)acryIamide

<img file="CA2976788C_D0075.tif" />

Step 1: 4-chloro-5-((2,6-difluoro-3,5-dimethoxyphenylamino)methyl)picolinonitrile

<img file="CA2976788C_D0076.tif" />

A stirred mixture of N-[(4,6-dichloropyridin-3-yl)methyl]-2,6-difluoro-3,5dimethoxy aniline (prepared as in Example 1, Step 2,3.50 g, 10.0 mmol), zinc cyanide (0.79 g, 6.7 mmol), tris(dibenzylideneacetone)dipaliadium(0) (0.92 g, 1.0 mmol) and [1,1bis(diphenylphosphino)ferrocene]dichloropalladium(II)coinplexed with dichloromethane (1:1) (0.82 g, 1.0 mmol) in Ν,Ν-dimefliylformamide (50 mL) was heated at 125-130°C under an atmosphere of N₂ for 1.5 hours. The reaction mixture was then cooled to room temperature, quenched with saturated aqueous NaHCOî, and extracted with ethyl acetate (3 x 100 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered 74

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770 and concentrated under reduced pressure. The residue was purified on silica gel (eluting with 0-25% EtOAc in hexanes) to give 2.57 g of the desired product. LCMS calculated for Ci5HiîClF2N3O2[M+H]⁺m/z: 340.1; Found: 340.0

Step 2: tert-butyl 4-{[7-cyano-3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-3,4dihydropyrido[4,3-d]pyrimidin-l(2H)-yl]methyl}piperidine-l-carboxylate

<img file="CA2976788C_D0077.tif" />

<img file="CA2976788C_D0078.tif" />

A stirred mixture of 4-chloro-5-{[(2,6-difluoro-3,5dimethoxyphenyl)amino]methyl}pyridine-2-carbonitrile (200 mg, 0.6 mmol), tert-buty\ 4(aminomethyl)piperidinecarboxylate (170 pL, 0.82 mmol), palladium acetate (13 mg, 0.059 mmol), (/?)-(+)-2,2'-bis(diphenylphosphino)-l,r-binaphthyl (37 mg, 0.059 mmol), and cesium carbonate (580 mg, 1.8 mmol) in 1,4-dioxane (10 mL) was heated at 110°C under an atmosphere of N2 for 5 hours. The reaction mixture was cooled to room temperature, diluted with ethyl acetate, filtered and the filtrate was concentrated under reduced pressure. The residue was used directly in the next step without further purification.

To a stirred solution of die above residue in tetrahydrofuran (8 mL), N,Ndiisopropylethylamine (620 pL, 3.5 mmol) and triphosgene (170 mg, 0.59 mmol) was added sequentially at room temperature. After 30 minutes, NaOH (2 N in water, 2 mL) was added. The resulting mixture was stirred at 30 °C for 1 hour. The reaction was quenched with saturated aqueous NaHCOj, and extracted with ethyl acetate (3x 20 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified on silica gel (eluting with 0-45% EtOAc in hexanes) to give 0.20 g of the desired product LCMS calculated for C27H3iF2NsNaOs [M+Na]⁺ m/z: 566.2; Found: 566.2

Step 3: tert-butyl 4-((7-(aminomethyl)-3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-3,475

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770 dihydropyrido[4,3-d]pyrimidin-l (2H)-yl)methyl)piperidine-l-carboxylate

<img file="CA2976788C_D0079.tif" />

To a solution of terr-butyl 4-{[7-cyano-3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo3,4-dihydropyrido[4,3-d]pyrimidin-l(2H)-yl]methyl}piperidine-l-carboxylate (200 mg, 0.4 mmol) in methanol (5.0 mL), HCI (1.0 M in waler, 680 pL, 0.68 mmol) and Pd/C (10 % w/w,20 mg) were added sequentially at room temperature. The resulting mixture was stirred at room temperature under an atmosphere of H2 for 2 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure to afford the crude product as its HC1 salt LCMS calculated for C27H36F2N5O5 [M+H]⁺ m/z: 548.3; Found: 548.3.

Step 4: tert-butyl 4-((7-(acrylamidomethyl)-3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-3,4dihydropyrido[4,3-d]pyrimidin-l(2H)-yl)methyl)piperidme-l-carboxylate

<img file="CA2976788C_D0080.tif" />

To a stirred solution of ie/r-butyl 4-((7-(aminomethyl)-3-(2,6-difluoro-3,5dimethoxyphenyl)-2-oxo-3,4-dihydropyrido[4,3-d]pyrirnidin-l(2H)-yl)methyl)piperidine-lcarboxylate (186 mg, 0.34 mmol) in acetonitrile (2 mL), triethylamine (160 pL, 1.1 mmol) and 2-propenoyl chloride (27 pL, 0.34 mmol) were added sequentially at room temperature. After 30 minutes, the reaction was quenched with saturated aqueous NaHCOj, and extracted with ethyl acetate (3x 20 mL). The combined organic layers were washed with brine, dried over MgSCh, filtered and the filtrate was concentrated under reduced pressure.

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

The residue was purified on silica gel (eluting with 0-100% EtOAc in DCM) to give 0.09 g the desired product. LCMS calculated for CsdHbeFiNsOe [M+H]⁺ m/z: 602.3; Found: 602.2.

Step 5: N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-(piperidin-4-ylmethyl)-l,2,3,4tetrahydropyrido[4,3-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0081.tif" />

To a stirred solution of tert-butyl 4-((7-(acrylamidomethyl)-3-(2,6-difluoro-3,5&lt;timethoxyphenyl)-2-oxo-3,4-dihydropyrido[4,3-d]pyrimidin-l(2H)-yl)methyl)piperidine-lcarboxylate (90 mg, 0.15 mmol) in DCM (1 mL), TFA (1 mL) was added at room temperature. After 1 hour, the volatiles were removed under reduced pressure to give desired product as its TFA salt. LCMS calculated for C25H30F2N5O4 [M+H]⁺ m/z: 502.2; Found: 502.2.

Step 6: N-((3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-((l-methylpiperidin-4-yl)methyl)-2-oxol,2,3,4-tetrahydropyrido[4,3-d]pyrimidin-7-yl)methyl)acrylamide

To a stirred solution ofN-{[3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-(piperidin4-ylmethyl)-l ,2,3,4-tetrahydropyrido[4,3-d]pyrimidin-7-yl]methyl} acrylamide 2,2,2trifluoroacetate (15 mg, 0.030 mmol) in tetrahydrofuran (1 mL), formaldehyde (10.0 M in water, 6.2 pL, 0.062 mmol) and N,N-diisopropylethylamine (14 pL, 0.082 mmol) were added sequentially at room temperature. After 5 minutes, sodium triacetoxyborohydride (13 mg, 0.062 mmol) was added. After another 2 hours, the reaction mixture was diluted with MeOH and purified by RP-HPLC (pH = 10, acetonitrile/water+NH4OH) to afford the desired product LCMS calculated for C26H32F2N5O4 [M+H]⁺ m/z: 516.2; Found: 516.2.

Example 33 methyl 4-((7-(acryIamidomethyI)-3-(2,6-difluoro-3,5-dinietiioxyphenyI)-2-oxo-3,4dihydropyrido[4,3-d]pyriinidm-l(2H)-yl)methyl)piperidine-l-carboxylate

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<img file="CA2976788C_D0082.tif" />

To a stiaed solution of N-{ [3-(2,6-difluoro-3,5-dimethoxyphenyl)-2-oxo-l-(piperidin4-ylmethyl)-l ,2,3,4-tetrahy dropyrido[4,3-d]pyrimidin-7-yl]methyl} acrylamide 2,2,2trifluoroacetate (prepared as in Example 32, Step 5,15 mg, 0.030 mmol) in tetrahydrofuran (1.0 mL), N,N-diisopropylethylamine (14 pL, 0.082 mmol) and methyl chloroformate (2.4 pL, 0.031 mmol) were added sequentially at room temperature. After 30 minutes, the reaction mixture diluted with MeOH and purified by RP-HPLC (pH = 10, acetonitrile/water+NH4OH) to afford the desired product. LCMS calculated for C27H32F2N5O6 [M+H]⁺ m/z: 560.2; Found: 560.3.

Example 34 4-((7-(acryIamidomethyI)-3-(2,6-difIuoro-3,5-diinethoxyphenyI)-2-oxo-3,4dihydropyrido[43-d]pyrimidin-l(2H)-yl&gt;nethyl)-N-isopropyIpiperidine-l-carboxamide

<img file="CA2976788C_D0083.tif" />

The title compound was prepared using procedures analogous to those described for Example 33, with 2-isocyanatopropane replacing methyl chloroformate. LCMS calculated for C29H37F2N6O5 [M+H]⁺ m/z: 587.3; Found: 587.2

Example 35

N-( (3-(2,6-difluoro-3,5-dimethoxyphenyl)-l-((l-(methyIsulfonyl)piperidin-4-yl)methyl)78

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

2-oxo-1,2,3,4-tetrahydropyrido[4,3-d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0084.tif" />

ο

The title compound was prepared using procedures analogous to those described for

Example 33, with methanesulfonyl chloride replacing methyl chloroformate. LCMS calculated for C26H32F2N5O6S [M+H]⁺ m/z: 580.2; Found: 580.1

Example 36

N-((3-(2,6-dichloro-3^-dimethoxyphenyl)-l-ethyL2-oxo-1^3,4-tetrahydropyrido[43d]pyrimidin-7-yl)methyl)acrylamide

<img file="CA2976788C_D0085.tif" />

Step 1: N-(3,5-dimethoxyphenyl)acetamide

<img file="CA2976788C_D0086.tif" />

To a stirred solution of 3,5-di methoxy aniline (15.0 g, 97.9 mmol) in toluene (200 mL) was added acetic anhydride (10.2 mL, 108 mmol) dropwise. After 3 hours, the reaction mixture was diluted with 100 mL hexanes, filter and the solid was washed with toluene/hexane(2:l, 30mL), then hexanes. The solid was dried under reduced pressure to give the desired compound (18.9 g). LCMS calculated for C10H14NO3 [M+H]⁺ m/z: 196.1; Found: 196.2.

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

Step 2: N-(2,6-dichloro-3,5-dimethoxyphenyl)acetamide

<img file="CA2976788C_D0087.tif" />

To a stirred suspension of N-(3,5-dimethoxyphenyl)acetamide (16.0 g, 82.0 mmol) in acetonitrile (200 mL), sulfuryl chloride (13.0 mL, 160 mmol) was added dropwise over 5 minutes at 0°C. After 30 minutes, the reaction was quenched with saturated aqueous NaHCOî (125 mL), filtered and the solid was washed with water and hexanes to afford the desired product, (8.5 g). The filtrate was diluted with 100 mL of saturated aqueous NaHCOs then extracted with EtOAc. The organic layers were combined, washed with water, dried over NaaSOi, filtered and the filtrate was concentrated under reduced pressure. The residue was purified on silica gel (eluting with 0-40% EtOAc in hexanes) to afford another 10.0 g of the desired product. LCMS calculated for C10H12CI2NO3 [M+H]⁺ m/z: 264.0; Found: 263.9.

Step 3: 2,6-dichloro-3,5-dimethoxyanilme

<img file="CA2976788C_D0088.tif" />

N-(2,6-dichloro-3,5-dimethoxyphenyl)acetamide (8.5 g, 32 mmol) was dissolved in ethanol (160 mL) then a solution of potassium hydroxide (9.0 g, 160 mmol) in water (80 mL) was added. The mixture was heated to reflux and stirred for 48 hours. After the reaction was cooled to room temperature, the white precipitate was collected via filtration and washed with cold water then dried to get the desired product (6.0 g). LCMS calculated for CSH10CI2NO2 [M+H]⁺ m/z: 222.0; Found: 221.9.

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÜS2016/018770

Step 4: 2,6-dichloro-N-((4,6-dichloropyridin-3-yl)methyl)-3,5-dimethoxyaniline

N ci

The title compound was prepared using procedures analogous to those described for Example 1, Step 2 with 2,6-dichloro-3,5-dimethoxy aniline replacing 2,6-difluoro-3,5dimethoxyaniline. LCMS calculated for C14H13CI4N2O2 [M+H]⁺ m/z: 381.0; Found: 381.0

Step 5: N-((3-(2,6-dichloro-3,5-dimethoxyphenyl)-l-ethyl-2-oxo-l,2,3,4tetrahydropyrido[4,3-d]pyrimidin-7-yl)methyl)acrylamide

The title compound was prepared using procedures analogous to those described for Example 2, with 2,6-dichloro-N-((4,6-dichloropyridin-3-yl)methyl)-3,5-dimethoxyaniline (Step 4) replacing 2,6-difluoro-N-((4,6-dichloropyridin-3-yl)methyl)-3,5-dimethoxyaniline in Step 1. LCMS calculated for C21H23CI2N4O4 [M+H]⁺ m/z: 465.1; Found: 465.1.

Example 37

N-((2’-(2,6-difluoro-3^-dimethoxyphenyl)-5'-methy!-3'-oxo-2'3’-dihydro-rHspiro[cydopropane-M'-[2,7]naphthyridine]-6’-yI)methyI)acryIamide

Step I: (4,6-dichloro-5-methylpyridin-3-yl)methanol

To a stirred solution of ethyl 4,6-dichloro-5-methylnicotinate (6.70 g, 28.6 mmol) in methylene chloride (100 mL), diisobutylaluminum hydride (1.0 M in toluene, 60. mL, 60. mmol) was added dropwise at -78°C. After 1 hour, the reaction mixture was quenched with

C* 02976788 2017-08-15

WO 2016/134314 PCT/ÜS2016/018770 saturated aqueous potassium sodium tartrate (7 mL) then stirred at room temperature overnight. The organic layer was separated and the aqueous layer was extracted with DCM. The combined organic layers were dried over MgSÛ4, filtered and concentrated under reduced pressure to afford die crude product (5.46 g). LCMS calculated for CrHsChNO [M+H]⁺ m/z: 192.0; Found: 192.0

Step 2: N-((4,6-dichloro-5-methylpyridin-3-yl)methyl)-2,6-difluoro-3,5-dimethoxyaniline

<img file="CA2976788C_D0089.tif" />

To a stirred solution of (4,6-dichloro-5-methylpyridin-3-yl)methanol (5.46 g, 28.4 mmol) in methylene chloride (100 mL), Ν,Ν-diisopropylethylamine (9.90 mL, 56.9 mmol) and methanesulfonyl chloride (2.9 mL, 37 mmol) were added sequentially at 0°C. After another 2 hours, the reaction mixture was quenched with saturated aqueous NaHCOi, and extracted with DCM (3x 100 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was used in the next step without further purification.

2,6- difluoro-3,5-dimethoxyaniline (7.5 g, 40. mmol) was added to 1he above residue in Ν,Ν-diisopropylethylamine (24 mL, 140 mmol). The resulting mixture was stirred at 100 °C overnight. The reaction mixture was cooled to room temperature, quenched with saturated aqueous NaHCCh, and extracted with ethyl acetate (3 x 100 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified on silica gel (eluting with 0-25% EtOAc in hexanes) to afford 7.5 g of the desired product. LCMS calculated for C15H15CI2F2N2O2 [M+H]⁺ m/z: 363.0; Found: 363.0

84036542

Step 3: 6 -chloro-2 -(2,6-difluoro-3,5-dimemoxyphenyl)~5-methyl-l H-spiro[cyclopropanel,4'-[2,7]naphthyridin]-3'(2'H)-One

<img file="CA2976788C_D0090.tif" />

The title compound was prepared using procedures analogous to those described for Example 1, Steps 3 to 6, withN-((4,6-dichloro-5-methylpyndin-3-yl)methyl)-2,6-difluoro3,5-dimethoxyaniline (Step 2) replacing N-((4,6-dichloropyridin-3-yl)methyI)-2,6-difluoro3,5-dimethoxyaniline in Step 3. LCMS calculated for C19H18CIF2N2O3 [M+H]⁺ m/z: 395.1; Found: 395.1.

Step 4: N-((2'-(2,6-difluoro-3,5-dimethoxyphenyl)-5'-methyl-3'-oxo-2',3'-dihydro-l'Hspiro[cyclopropane-l,4’-[2,7]naphthyridine]-6'-yl)methyl)acrylaimde

The title compound was prepared using procedures analogous to those described for Example 2, Steps 2 to 6, with 6'-chloro-2'-(2,6-difluoro-3,5-dimethoxyphenyl)-5'-methyl-rHspiro[(yclopropane-l,442,7]naphthyridin]-3^,(2'H)-one(S^ 3) replacing 7-^10^3-(2,6difluoro-3,5-dimethoxyphenyl&gt;l-ethyl-3,4-dihydropyrido[4,3-dlpyrimidin-2(lH&gt;(Hie in Step 2. LCMS calculated for C2jEb»F2NiO4M+H]⁺ m/z: 444.2; Found: 444.2.

Example A

FGFR Enzymatic Assay

The inhibitor potency of the exemplified compounds was measured in an enzyme assay feat measures peptide phosphorylation using FRET measurements to detect product formation. Inhibitors were serially diluted in DMSO and a volume of 0.5 pL was transferred to tiie wells of a 384-well plate. For FGFR3, a 10 pL volume of FGFR3 enzyme (Millipore) diluted in assay buffer (50 mM HEPES, 10 mM MgCh, 1 mM EGTA, 0.01% Tween™-20,5 mM DTT, pH 7.5) was added to the plate and pre-incubated for a time between 5-10 minutes and up to 4 hours. Appropriate controls (enzyme blank and enzyme with no inhibitor) were included on the plate. The assay was initiated by the addition of a 10 pL solution containing biotinylated EQEDEPEGDYFEWLE peptide substrate (SEQ ID NO: 1) and ATP (final

Date Reçue/Date Received 2022-08-05

C* 02976788 2017-08-15

WO 2016/134314

PCT/ÏIS2016/018770 concentrations of 500 nM and 140 μΜ respectively) in assay buffer to the wells. The plate was incubated at 25 °C for 1 hr. The reactions were ended with the addition of 10 pL/well of quench solution (50 mM Tris, 150 mM NaCl, 0.5 mg/mL BSA, pH 7.8; 30 mM EDTA with Perkin Elmer Lance Reagents at 3.75 nM Eu-antibody PY20 and 180 nM APC-Streptavidin). The plate was allowed to equilibrate for ~1 hr before scanning the wells on a PheraStar plate reader (BMG Labtech).

FGFR1, FGFR2, and FGFR4 are measured under equivalent conditions with the following changes in enzyme and ATP concentrations: FGFR1, 0.02 nM and 210 uM respectively, FGFR2, 0.01 nM and 100 uM, respectively, and FGFR4, 0.04 nM and 600 uM respectively. The enzy mes were purchased from Millipore or Invitrogen.

GraphPad prism3 was used to analyze the data The ICso values were derived by fitting the data to the equation for a sigmoidal dose-response with a variable slope. Y=Bottom + (Top-Bottom)/(l+10^A((LogIC5o-X)*HillSlope)) where X is the logarithm of concentration and Y is the response. Compounds having an ICso of 1 μΜ or less are considered active.

The compounds of the invention were found to be selective inhibitors of FGFR4 according to the FGFR Enzymatic Assay. Table 1 provides ICso data for compounds of the invention assayed in the FGFR Enzymatic Assay after dilution in assay buffer, added to the plate and pre-incubated for 4 hours. The symbol: “+” indicates an ICso less than 10 nM; “++” indicates an ICso greater than or equal to 10 nM but less than 30 nM; “+++” indicates an ICso greater than or equal to 30 nM but less than 200 nM; and “++++” indicates an ICso greater than or equal to 200 nM.

Table 1

<td> Example No.</td><td> FGFR1 ICSO (nM)</td><td> FGFR2 ICSO(nM)</td><td> FGFR3 ICSO (nM)</td><td> FGFR4 ICSO (nM)</td>

<td> 1</td><td> +++</td><td> +++</td><td> Ή4</td><td> +</td>

<td> 2</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +</td>

<td> 3</td><td> Illi</td><td> Illi</td><td> Illi</td><td> ++</td>

<td> 4</td><td> ++++</td><td> ++++</td><td> ++++</td><td> ++</td>

<td> 5</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +</td>

<td> 6</td><td> ++++</td><td> ++++</td><td> ++++</td><td> ++</td>

<td> 7</td><td> ++++</td><td> ++++</td><td> ++++</td><td> ++</td>

<td> 8</td><td> h H 1</td><td> i + n</td><td> ++++</td><td> +</td>

<td> 9</td><td> lili</td><td> *1*4' +l·</td><td> I 1 I I</td><td> ++</td>

<td> 10</td><td> ++++</td><td> ++++</td><td> ++++</td><td> ++</td>

<td> 11</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +</td>

C* 02976788 2017-08-15

WO 2016/134314

PCT/IIS2016/018770

<td> 12</td><td> ++++</td><td> Illi</td><td> ++++</td><td> +</td>

<td> 13</td><td> J· | |·</td><td> ++++</td><td> Ml</td><td> +</td>

<td> 14</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +</td>

<td> 15</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +</td>

<td> 16</td><td> +++</td><td> +++</td><td> -1-+-1-</td><td> ++</td>

<td> 17</td><td> ++++</td><td> ++++</td><td> ++++</td><td> ++</td>

<td> 18</td><td> +++</td><td> +++</td><td> +++</td><td> +</td>

<td> 19</td><td> 4+4 +</td><td> + 4++</td><td> ++++</td><td> +</td>

<td> 20</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +</td>

<td> 21</td><td> Illi</td><td> Illi</td><td> Illi</td><td> -4-</td>

<td> 22</td><td> till</td><td> ++++</td><td> ++++</td><td> ++-</td>

<td> 23</td><td> ++++</td><td> +++</td><td> ++++</td><td> +-+-</td>

<td> 24</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +++</td>

<td> 25</td><td> ++++</td><td> ++++</td><td> ++++</td><td> ++</td>

<td> 26</td><td> fill</td><td> till</td><td> ++++</td><td> ++</td>

<td> 27</td><td> ++++</td><td> Illi</td><td> ++++</td><td> +</td>

<td> 28</td><td> +++</td><td> +++</td><td> -1-4-1-</td><td> +</td>

<td> 29</td><td> +++</td><td> +++</td><td> ++++</td><td> +</td>

<td> 30</td><td></td><td> +++</td><td> ++++</td><td> +</td>

<td> 31</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +</td>

<td> 32</td><td> ++++</td><td> ++++</td><td> ++++</td><td> +++</td>

<td> 33</td><td> ++++</td><td> m i-</td><td> 1-4-4</td><td> +</td>

<td> 34</td><td> Illi</td><td> Illi</td><td> Illi</td><td> -4-</td>

<td> 35</td><td> Illi</td><td> II 1 1</td><td> ++++</td><td></td>

<td> 36</td><td> ++++</td><td> Mil</td><td> ++++</td><td> +</td>

<td> 37</td><td> ++++</td><td> ++++</td><td> ++++</td><td> ++</td>

Table 2 provides ICso data for compounds of the invention assayed in the FGFR Enzymatic Assay after dilution in assay buffer, added to foe plate and pre-incubated for 5 to 10 minutes. The symbol: “+” indicates an ICso less than 10 nM; “++” indicates an ICso greater than or equal to 10 nM but less than 30 nM; “+++” indicates an ICso greater than or equal to 30 nM but less than 200 nM; and “++++” indicates an ICso greater than or equal to 200 nM.

Table 2

<td> Example No.</td><td> FGFR1 ICSO (nM)</td><td> FGFR2 ICSO(nM)</td><td> FGFR3 IC50 (nM)</td><td> FGFR4 IC50 (nM)</td>

<td> 1</td><td> +++</td><td> ++++</td><td> ++++</td><td> +</td>

Example B

FGFR4 Cellular and In Vivo Assays

84036542

The FGFR4 inhibitory activity of the example compounds in cells, tissues, and/or animals can be demonstrated according to one or more assays or models described in the art such as, for example, in French et al. “Targeting FGFR4 Inihibits Hepatocellular Carcinoma in Preclinical Mouse Models,” PLoS ONE, May 2012, Vol. 7, Issue 5, e36713.

Various modifications of die invention, in addition to those described herein, will be apparent to those skilled in the art from the foregoing description.

Date Reçue/Date Received 2023-03-30