Biodegradable non-crosslinked polymers of low or zero-water-solubility

The present invention relates to biodegradable polymers, more particularly lipophilic polymers which are biodegradable to form water soluble polymers.

Biodegradable polymers have long been used in medical applications such as biodegradable implants and delayed release drug delivery systems. They are now more interested in Overcoming contamination with long-lasting packaging liners, household items, cleaning products and the like.

There is also a need for polymers which, when completely or partially chemically or biologically degraded, provide reliable non-toxic and easily removable products.

In general, biodegradation usually involves the enzymatic hydrolysis of certain chemical bonds in the polymer, especially in the ester, urethane or amide groups which otherwise are stable in the absence of enzymes; such hydrolysis may be additionally or alternatively affected by the presence of acids or bases. Thus, aliphatic polyesters such as polycaprolactone, polyethylene adipate and polyglycolic acid are candidates for packaging materials, although polyethylene terephthalate, which is very widely used in textiles and fibers, is resistant to biodegradation.

Medical resorbable polymers are needed for sutures and wound healing, resorbable implants for the treatment of osteomyelitis and other bone lesions, tissue adhesion and retinal tamponade, anastomosis, as well as drug delivery systems and diagnostics. In these fields, polylactic acid, polyglycolic acid, poly (L-lactide-co-glycolide), polydioxanone, polyLT 3199 B glycolide-co-trimethylene carbonate, polyethylene carbonate, polyiminocarbonates, polyhydroxybutyrate, polyamino acids, polyester amides were all proposed, (TH Barrows, Clinical Materials 1 (1986), pp. 233-257) as do natural products such as polysaccharides. Specifically, U.S. Pat. 4180646 describes new polyorthoesters used in a very wide range of products.

In our International Application No. WO92 / 04392, the disclosure of which is incorporated herein by reference, describes a wide range of polymers characterized in that these polymers contain optionally substituted units of formula I methylene diester

CO-OC (R^LR²) -O-CO} I,

2 (wherein R and R are each a hydrogen atom or a carbon-attached monovalent organic group or R and R together form a carbon-attached divalent organic group). Such elements are particularly rapidly degraded by simple esterase enzymes but are stable in the absence of enzymes. They may be attached not only to carbon-containing organic groups, as in the simple carboxylate esters, but also to -O- atoms, as in the carbonate esters.

The aforementioned units of Formula I are generally present in the polymer skeleton either as repeating elements or as linking elements between polymer moieties or in crosslinking groups between polymer chains. In the latter context, it is possible, for example, to convert a water-soluble long-chain natural or synthetic biodegradable or slowly biodegradable material, such as a protein such as gelatin or albumin, a polysaccharide or oligosaccharide, or a short-chain polyacrylamide into a water-insoluble but cross-linking using cross-linking groups containing units of formula I; this can reduce the cost of the product compared to polymers that contain formula I units on the polymer skeleton (base), reducing the relative content of relatively expensive formula I units.

Although such crosslinking polymers are widely used as described in the above-mentioned application no. WO92 / 04392, their structure inevitably imposes some restrictions on the processing of the polymers since, by their cross-linking nature, they will generally be insoluble in both organic and aqueous solvents and will not have thermoplastic properties. Therefore, conventional methods such as solvent casting or melting cannot be used.

The present invention is based on our invention for the preparation of substantially non-crosslinking (e.g., linear) polymers having biodegradable lipophilic side chains, including methylene diester units of Formula I, such that these polymers offer the advantages of being substantially water-insoluble. (or significantly reduced solubility), although thermoplastic, soluble in many organic solvents and, being biodegradable, yields water-soluble (and therefore readily dispersible and / or removable cleavage products), in some cases a water-soluble polymer obtained by the biological cleavage of lipophilic side chains.

In European patent no. 0130935 describes biodegradable esterified polypeptides of the formula

- (NH-CH-CO)_XI (CH₂) _Y-COO-CR^aR^b-OOC-R^c (where R^a and R^b are alkyl or hydrogen atoms and R^c is an optionally substituted aliphatic or aromatic group, or R^b is a hydrogen atom or an alkyl group and R and R^c together form a divalent group such as dimethylene, vinylene or phenylene (y is 1 or 2, x is such that the polymer has a molecular weight of at least 5,000) and copolymers thereof with other polyamino acids as delayed release drug carriers which can be mixed together or embedded in a polymer. The first step in the cleavage of such polymers, as it is written, should be the cleavage of the side chain methylene diester groups to give the polymers containing the formula

- (NH-CH-CO) i (CH 3 _y-COOH units. It is contemplated that such polymers will be further cleaved by peptidases to their component amino acid (s), which may be absorbed by the host to which the polymer / drug was administered. This cleavage example can be contrasted with the polymers of the present invention wherein the polymers obtained by cleavage of the lipophilic methylene diester side chain are specifically selected to be water soluble so that they can be cleaved and / or^- removed without the required further fragmentation.

Possible polymers described in European patent no. 0130935, the disadvantage is that the large number of hydrogen bonds present in the polypeptides should cause relatively high melting temperatures so that they cannot be fused without the occurrence of premature cleavage. Further, peptide structures can cause allergic reactions when used in vivo.

In one aspect of the present invention we provide biodegradable low or total insoluble non-crosslinking polymers comprising a non-polypeptide backbone polymer and at least portions of said side chains having lipophilic moieties bonded to the polymer backbone via formula I methylene diester units as described above, wherein said lipophilic moieties are biodegradable to yield a water-soluble polymer.

As noted above, each of the ester groups of the methylene diester units of formula I may be either a carbonate group. The polymers may thus be provided as either the carboxylate of the present invention containing the formula II [A]

I (L) - (O) _m-CO-OC (R^XR²) -O-CO- (O) _n-R³ II, units wherein A represents a non-polypeptide polymer backbone (skeleton) chain; L represents an optionally linking group (i.e., I is 0 or 1), m and n, which may be the same or different, each is 0 or 1; R * and R² are as defined above; R³is a lipophilic organic group.

Biodegradation of the methyl diester groups in polymers containing the units of formula (II) will generally take place in the bonds linking the -OC (R^XR²) -O to adjacent carbonyl groups normally obtained by enzymatic hydrolysis of the formula R² aldehyde or ketone.The nature of other cleavage products will vary depending on whether m and n are O or 1; and yes, if m is zero, a carboxyl-containing water-soluble polymer of formula (III) will generally be formed.

Af

I (L)! -COOH (III), in units wherein A, L and I are as previously defined, if m is 1, the hypothetically formed carboxylic acid group will generally release carbon dioxide, and a hydroxyl-containing water-soluble polymer of formula (IV) will be obtained.

f Af

I (L), - OH (IV) wherein A, L and I are as previously defined, while R-COOH and R-OH will be similarly formed, depending on whether n is O or 1.

Factors affecting the water solubility of polymer cleavage products having units of formula (III) or (IV) include the nature of the repeating units A and any monomer units which may be present, linking the length of the group L, the chain length of the polymer, which is generally better. such that the molecular weight of the biodegradable polymer does not exceed about 2,000,000. Polymers of lower molecular weight may be useful, for example, in applications where a high degree of biodegradation is required. Thus, for example, polymeric systems designed for in vivo use, such as drug delivery systems or diagnostic tools for parenteral administration of up to about 40,000 molecular weights, may be preferred.

The repeating units A and any monomer units in the polymers of the present invention are preferably relatively short, e.g., having up to 10, e.g. 1-6 carbon atoms, and optionally inserted with one or more heteroatoms selected from oxygen, nitrogen and more heteroatoms, selected from oxygen, nitrogen and sulfur and / or substituted with one or more substituents containing such heteroatoms (e.g., as oxo, hydroxyl and amino). Where the hydrophilic groups are incorporated in the repeating units A and / or any monomer units, the size of these units should not be limited and the possible units thus include polyoxyethylene (e.g. as methacrylic acid in polyoxyethylene esters).

Any linking groups L are preferably short and include, for example, alkylene groups such as methylene, ethylene or propylene, which may be occluding and / or (where appropriate) By inserting, for example, oxy, carbonyl, oxycarbonyl, imine or iminecarbonyl groups . Where polar groups are present, such as oxygen atoms or imine groups, the linking groups may be longer, e.g., having up to 10 carbon atoms without excessively inhibited water solubility. Suitable polymeric cleavage products thus include, for example, polyvinyl alcohol, polyacrylic acid, polymethacrylic acid, polyhydroxyalkyl acrylates and methacrylates such as poly (2-hydroxyethyl acrylate), polysaccharides, polyesters, polyethers such as polyoxyethylenes and polyoxyethylenes, polymethacrylamides such as poly (N-hydroxyalkyl) acrylamides and methacrylamides (e.g. poly N- (2-hydroxypropyl) methacrylamide), polyamides, polyurethanes and epoxy polymers.

In general, the polymeric cleavage products of the cleavable polymers of the present invention may not themselves be biodegradable due to their water solubility; they may, for example, be polyolefinic. Therefore, the present invention encompasses polymers containing units of formula (II) wherein A is a repeating unit of a polyolefin such as ethylene or propylene. It will be appreciated that polymers of this type may be relatively easy and economical, in contrast to the more sophisticated methods of synthesizing polypeptides required for the preparation of polymers such as those described in European Patent No. 0130935.

In the biodegradable polymers of the present invention, at least some of the repeating units should have side chain units of the formula

- (L) _r (O) _m-CO-OC (Yr²) -O-CO- (O) _n-R³ as defined in formula (II), bonded to a polymer chain; it is understood that the exact degree of substitution may be varied, for example, by using copolymerization or fractional methods described below, as required, both in more detail to modify the solubility parameters of the biodegradable polymer and of the polymer degradation product.

... 3

R, R (other than hydrogen) and R in the side chain units of the above formula may, for example, each be a carbon-attached hydrocarbon or heterocyclic group, e.g., having 1-20 carbon atoms, such as an aliphatic group such as an alkyl or alkenyl group (preferably having up to 10 carbon atoms), a cycloalkyl group (preferably having up to 10 carbon atoms), an analiphatic group such as an anilalkyl group (preferably having up to 20 carbon atoms) or a heterocyclic group, having up to 20 carbon atoms and one or more heteroatoms selected from O, S and N. Such hydrocarbon or heterocyclic group may have one or more functional groups such as halogen atoms or groups having the formula -NR⁴R⁵-, CONR⁴R⁵-, -OR⁶-, SR⁶-, and -COOR⁷, where R⁴ and R⁵which may be the same or different are hydrogen atoms, acyl groups

2 or a hydrocarbon group as defined for R and R or a hydrocarbon group as defined for R and R⁶, is a hydrogen atom or an acyl group or a group as defined for R or R and R is a hydrogen atom or a group defined in R¹ or R² case.

- o

Where R^x and R '' is a divalent group, which may, for example, be an alkylidene, alkenylidene, alkylene or alkenylene group (preferably having up to 10 carbon atoms) which may have one or more functional groups as defined above. R³ the carbon chains of the groups may, for example, be inserted and / or terminated with heteroatoms such as O, N or S.

Existing aliphatic groups such as R¹, R^z or R³may be linear or branched, saturated or unsaturated, and may include, for example, alkyl or alkenyl groups such as methyl, ethyl, propyl, isopropyl, butyl, decyl or allyl. Aryl aliphatic groups include (monocarbocyclic aryl) -alkyl groups, such as benzyl groups. Aryl groups include mono- or bicyclic aryl groups such as phenyl, tolyl or naphthyl. Heterocyclic groups include 5- or 6-membered heterocyclic groups preferably having a single heteroatom, such as furyl, thienyl or pyridyl. Halogen substituents may be, for example, chlorine, bromine or iodine.

12. 3 ....

Nature and Size of R, R, and R Both the rate at which polymers containing the elements of Formula II are rendered lipophilic, thereby rendering them insoluble in water, and the rate at which the side chain is biodegraded. And yes, large and / or bulky groups will tend to reduce the rate of biodegradation through spatial barriers, while increasing the lipophilicity of the polymer. In one useful side chain category, R¹ and R² each is selected from hydrogen and alkyl groups such as methyl and R³ represents a lower alkyl group, e.g., preferably having 1-20 carbon atoms; such side chains combine essential degrees of lipophilicity and biodegradation.

It will be appreciated that both skeletons (backbones) and side chains of the polymers of the present invention should be selected such that their degradation products are biologically acceptable, in particular, that they are non-toxic. The degradation products of polymers for medical use should also be physiologically acceptable. thus, R, R, R, A and any linking group L should be such that the compound R is -CO-R, polymers containing the elements of formula III or IV and the formula or R^J-OH products would be physiologically acceptable, readily degradable and better eliminated, all being water soluble. Carbon dioxide produced by the decomposition of any existing carbonate groups will normally be acceptable; its preparation may be required in certain applications of the polymers of the present invention.

physiologically functionally

The polymers of the present invention may be prepared by any convenient means, for example, either by (A) reacting a water soluble polymer with a reactant serving to introduce the required lipophilic methylene diester side chain, or (B) a functional monomer carrying the required lipophilic methylene diester side chain. , polymerization.

The process (A) may be carried out, for example, by reaction of a polymer having additional alcoholic hydroxyl groups (e.g., polyvinyl alcohol, polyhydroxyalkyl acrylate or polysaccharide) with a compound of formula V.

X-CO-OC (R¹R²) -O-CO- (O) -R³

V, n

2 3 (wherein R, R, R and n are as previously defined and X is a leaving group such as a halogen atom such as fluorine, chlorine, bromine or iodine. Reagents of formula V may, for example, be prepared, as described by Folkmann and Lund, Synthesis 1990, 1159.

Such reactions, which will yield polymers containing units of formula II wherein m = 1, are efficiently performed in a solution such as a solvent such as tetrahydrofuran in the presence of a weak nucleophilic base such as pyridine.

Catalytic tertiary may also be used

<td>amino,</td><td>of bear as 4-dimethylaminopyridine.</td>

<td>Polymer</td><td>hydroxyl groups that are exposed to</td>

<td>make up</td><td>required lipophilic methylene diester</td>

The number of groups may be controlled by appropriate selection of factors such as reagent quality, reaction time, and temperature to provide the final hydrophilic-lipophilic balance of the lipophilized polymer. The product may be purified by standard techniques such as solvent extraction and / or dissolution / re-precipitation.

Alternatively, the process (A) may be carried out by reacting a polymer having additional carboxyl groups (e.g., polyacrylic acid or polymethacrylic acid) with VI.

<td>formulas</td><td>compound</td>

<td></td><td>k-CRV-O-CO- (0) _n-R³ VI</td>

in which R¹, R², R³, X and n are as previously defined. Such reactions, which will give polymers containing units of formula II where m = 0, are conveniently carried out in a solution such as a solvent such as N, N-dimethylformamide in the presence of a strong base such as an alkali metal alkoxide. as potassium tLT 3199 B butoxide. A catalytic amount of a crown ether such as 18cr-β may also be utilized. Again, the hydrophilic-lipophilic balance can be controlled by appropriate selection of reaction parameters to determine the number of carboxyl groups that are exposed, and the product is purified by conventional methods.

Reagents of formula VI may be prepared, e.g.

2 reaction of an aldehyde or ketone of formula R -CO-R with an acid halide or a haloformate ester of formula R³- (O) -CO-X, e.g. in the presence of a catalyst such as zinc chloride or pyridine.

(A) The process may also be carried out, for example, by reacting a polymer containing functional groups such as epoxy groups with a reagent containing a required lipophilic methylene diester group and having a terminal group reacting with such functional groups; end groups reacting with epoxy groups include amino, hydroxyl and carboxyl groups. Similarly, the latter groups may be present in the starting polymer and the reagent may have a terminal epoxy group.

It is generally accepted that the polymer starting materials used in process (A) have a molecular weight of no more than 2,000,000.

(B) The process may be carried out using any monomer which may be polymerized or copolymerized to form non-crosslinked polymers, which have one or more substituents which do not participate in the polymerization and which may be converted to other derivatives prior to polymerization to introduce the lipophilic methylene diester group.

Radical condensation and ionic polymerization techniques can be used.

Free radical-initiated polymerization can, for example, be carried out using carboxyl-containing monomers, such as acrylic acid or methacrylic acid, by reaction with a compound of formula IV, or by using hydroxyl-containing monomers, such as 2-hydroxyethyl acrylate or N (-2 hydroxypropyl) methacrylamide converted to a derivative by reaction with a compound of formula V. Alternatively, hydroxyl-containing monomers may be treated with a compound of formula VII

X-CO-OC (RV) -X VII wherein R¹, R² and X is as hereinbefore defined and the resulting product is treated with an appropriate carbonic acid R³COOH salt.

The free radical polymerization can also be carried out using vinyl carbonate esters of the formula

CH₂= CH-O-CO-OC (RV) -O-CO- (O) _n-R³ VIII, {in which n, R¹, R² and R³ are as defined above). Such monomers, e.g., containing n = 0, may be prepared by reaction of vinyl chloroformate with an aldehyde or ketone, RRC = 0, in the presence of a catalytic amount, such as pyridine or Lactic acid, to afford an optionally substituted chloromethyl vinyl carbonate of formula IX.

CH₂= CH-O-CO-OC (R²R²) -Cl

IX wherein R and R are as previously defined, followed by reaction with an appropriate carbonic acid R³-COOH salt, preferably in the presence of a catalytic amount of a suitable crown ether. It is understood that compounds of Formula VIII may be formally considered to be a compound of Formula VII derivatized with vinyl alcohol. The polymers obtained from it should accordingly be enzymatically degraded to polyvinyl alcohol.

Conventional methods of polymerization in volume, solution, emulsion and suspension may be used. The molecular weight of the polymer product, which preferably should not exceed about 2,000,000, can be controlled by the use of chain breaking agents such as mercaptans, from which a growing polymer chain can cleave a proton to terminate a chain and a sulfur radical that will start a new polymer chain; the molecular weight of the polymer will thereby be controlled by the type and concentration of the terminating agent.

Suitable vinyl monomers, e.g., having a carbonyl attached to the vinyl group, as acrylic or methacrylic esters, e.g., prepared as described above, can also be subjected to ionic polymerization techniques, both anionic and cationic; such methods are particularly suitable for the production of well-defined molecular weight polymers, particularly for relatively low molecular weight materials.

Condensation polymerization can be carried out using a wide range of monomers with suitable functional groups, examples of which can be found in formulas X and XI:

Y

I (CH₂)_a

CH- (O) _m-CO-OC (rV) -O-CO- (O) _n-R³ X,

I (CH₂)_b

I

Y

YI (CH₂)_a

I

CH- (O)_m-CO-OC (R^rR²) -O-CO- (O)_n-R³

I (CH₂)_b

I

CH- (O) _m-CO-OC (R 6)²) -O-CO- (O) _n-R³ XI,

I (CH₂)_c

Y in which R¹, R², R³, m and n are as hereinbefore defined, Y is a reactive group such as carboxyl, hydroxyl or epoxy such as 2,3 epoxypropyloxy and a, b and c may each be 0 or a small integer such as 1 , 2 or

3. In formula XI, the groups R, R and R, m and n may be the same or different in the two side chains. Such monomers can be used in conventional condensation reactions with suitable reagents such as dicarboxylic acids, dialcohols, diamines, dicarboxylic acid chlorides, diisocyanates and bisepoxy compounds to give polymers such as polyesters, polyamides, polyurethanes and epoxy polymers. The molecular weight of the polymer product can be controlled by selecting appropriate reaction times, temperatures, etc. and / or monofunctional chain delimiters.

Where appropriate, the polymers of the present invention may be prepared using emulsion polymerization techniques; this can be very valuable where, for example, monodisperse particles need to be prepared. Emulsion polymerization methods for producing particles, particularly monodisperse particles, are described in European Patent Nos. 0003905, 0091453, 0010986 and 0106873.

The polymers of the present invention find application in, e.g., surgical implants such as sutures, soft tissue prostheses, tampons, tapes (e.g., artificial skin) or wound dressing (e.g., hydrogel layers), flexible sheeting materials, and the like. such as containers made from it, biodegradable delay release agents for medicines or agricultural chemicals, and gardening tools, such as water-retaining mulch liners and plant containers. Such uses and polymers formed for such uses have further features of the present invention. For use as prostheses, such formed polymers can usefully transfer heparin, at least on their surface.

As discussed above, the linear nature of the polymers of the present invention enhances their processability. Thus, due to their thermoplasticity, they can be fused by standard methods such as injection molding, extrusion, film blowing. Polymer solutions in suitable organic solvents may be used, for example, for tablet coating, film casting and spinning of yarns.

Where the polymer of the invention is intended to be used as a biodegradable delayed release agent, the active agent may be contained within a biodegradable polymer sheath, e.g., a capsule or microsphere, or physically incorporated during polymerization so as to be uniformly distributed within the polymer and released during biodegradation. Alternatively, the active ingredient may contain all or part of the groups R¹,

R or R and thus be isolated by enzymatic cleavage. Typical drugs for delayed release include steroids, contraceptives, antibacterials, drug-antagonists, and anticancer drugs.

The polymers of the invention, when they are typically short-chain, can be used as plasticizers for other polymers. When the polymers of the present invention are biodegradable, the degradation of the plasticizers thereby either breaks the integrity of the material or opens it to the action of enzymes. The biodegradable polymer particles of the present invention may also be usefully used for diagnostic purposes. In this way, the X-ray contrast agent, which will normally be a polyiodine aromatic compound, may form all or part of the group R³ or -C ^ R²) - so that it is released and safely excreted from the body during biodegradation. Such particles can be used for visualization of the liver and spleen as they are embedded in the reticuloendothelial systems of these organs.

The X-ray contrast agent may also typically be physically contained in the polymers by activation during polymerization.

The polymer particles of the present invention may also contain paramagnetic, superparamagnetic and ferromagnetic materials which are used in magnetic resonance imaging (MRI) diagnostics. In this way, very small iron or magnetic iron oxide particles can be physically incorporated into the polymers during polymerization to provide ferromagnetic or supermagnetic particles. Most importantly, the paramagnetic MRI contrast agent contains paraLT 3199 B magnetic metal ions, such as gadolinium ions, a chelating agent that retains release (and thus substantially eliminates their toxicity). Such chelating agents with bound metal ions may be physically contained in the polymers by introduction during polymerization or by group R¹, R² and R^J may contain suitable chelating groups. In general, many of these chelating agents are polyamine polycarboxylic acids such as diethylenetriamine pentaacetic acid (RB Lauffer,

Chem. Rev. 87 (1987), pp. 901-927).

The polymer particles of the present invention may also contain ultrasound contrast agents, such as heavy materials, such as barium sulfate, or iodinated compounds, such as X-ray contrast agents, previously mentioned to create an ultrasound contrast medium. The polymers of the present invention may also be used to prepare gas-containing porous polymer microparticles and gas-containing microspheres in polymer-coated capsules, both of which may be useful as ultrasound contrast agents.

The following examples are provided by way of illustration only.

SECTION

Methacrylic acid was distilled under high vacuum to remove the stabilizer. 2,230 Azobisisobutyronitrile (AIBN) thermal initiator was purified by recrystallization from methanol.

All reactions were performed under N₂ in the atmosphere.

> Size Exlusion Chromatography - SEC

Pump: Detector Speakers:

Solvent: Calibration:

Flow Rate Indicator: Software:

M. sv. :

Inc .:

M.w./M.sk :

Sec. :

Knauer HPLC Pump 64

Krauner Differential Refractometer with Polymer Laboratory PL Gel Column Series

Pore ​​sizes are 10 4A, 500A and 100A, and the part size is 5m, lengths are 30, 30 and 60 cm respectively.

THF

Polystyrene Standards (Polymer Laboratories)

Toluene

Polymer Laboratory GPC / SEC Software Version 5.10 Average by Weight Molecular Weight Average by Number Molecular Weight

Polydispersed spray

Molecular weight at maximum detector response

List of abbreviations

<td>Ts. :</td><td>Glass transition temperature</td>

<td>TBA-OH:</td><td>tetrabutylammonium hydroxide</td>

<td>TBA:</td><td>tetrabutylammonium</td>

<td>AIBN:</td><td>2,2-Azobisisobutyronitrile</td>

<td>SO₂C1₂:</td><td>sulfuryl chloride</td>

<td>EtSCl:</td><td>ethanesulfenchloride</td>

<td>DBU:</td><td>1,8-Diazabicyclo [5.4.0] undec-7-ene (1,5-5)</td>

<td>MgSO₄:</td><td>magnesium sulfate</td>

<td>THF:</td><td>tetrahydrofuran</td>

<td>DMF:</td><td>N, N-dimethylformamide</td>

EXAMPLE

Butyl methacryloxymethyl carbonate

To a solution of chloromethyl chloroformate (2.84 g, 22.0 mmol) and pyridine (1.78 mL, 22.0 mmol) in methylene chloride (24 mL) was added n-butanol (1.84 g, 20.0 mmol) at 0 ° C. After 30 minutes 0^uThe reaction mixture was washed with dilute hydrochloric acid (1M, 10 mL), saturated sodium bicarbonate solution in water (10 mL), and water (10 mL) at 21 ° C and 21 h. The solvent was removed under reduced pressure after drying over MgSO4₄2.66 g (80%) of crude butyl chloromethyl carbonate intermediate are obtained.

^l1 H NMR (60 MHz, CDCl 3)₃); δ, md;

0.86 (CH₃-CH₂, m), 1.40 (CH₂-CH₂, m), 4.15 (CH₂-0, t), 5.63 (CH₂-C1, s).

Intermediate n-butyl chloromethyl carbonate (2.5 g, 15.0 mmol) was dissolved in dimethylformamide (80 mL) and potassium methacrylate (1.77 g, 15.0 mmol) was added along with a catalytic amount of 18-crown-6 (0.2 g, 7.5 mmol). After 3 days at 25 ° C, the solvent was removed under reduced pressure, chloroform (30 mL) and water were added. (20 mL) and the product was extracted with chloroform. The solvent was removed under reduced pressure, dried over MgSO4₄. Flash chromatography gave 1.96 g '(61%) of butyl methacryloxymethyl carbonate.

NMR (300 MHz, CHCl₃); δ, md:

0.99 (CH₃-CH₂, t), 1.47 (CH₂-CH₂, m), 1.72 (CH₂-CH₂, m),

2.01 (CH₃, s), 4.25 (CH₂-0, t), 5.74 (HC =, m), 5.89 (OCH₂O, s), 6.27 (HO, m).

¹³c NMR (75MHz, CDCl3)₃); δ, md:

13.47 (CH₃), 17.97, 18.71, 30.36 (CH₃ and CH₂x2), 68.46 (CH₂O), 82.07 (O-CH₂-O), 127.46 (CH₂=), 135.05 (C =),

153.89 (C = O), 165.50 (C = O).

EXAMPLE

(a) Polymer of butyl methacryloxymethyl carbonate

The monomer butyl methacryloxymethyl carbonate (350 mg) was dissolved in THF (2 mL). AIBN (1 mg) was added as the initiator of radical polymerization. The product is precipitated with water.

Molecular Sieve Chromatography (SEC): M.sv. = 165000, M.sv. = 70000, M.sv./Ms.k = 2.3.

(b) Polymer of butyl methacryloxymethyl carbonate

A solution of butyl methacryloxymethyl carbonate (1.0 g) in DMF was heated to 6 ° C and AIBN (0.005 g, 0.03 mol) was added. After 24 hours, the reaction mixture was cooled and the polymer solution was added dropwise to a large volume of methanol. The polymer was filtered off, washed with water, dried under reduced pressure

IR (KBr): 1763 (C = 0) cm¹.

* Η NMR (300 MHz, CDCl₃); δ,

<td></td><td> 0.90</td><td>(t, 3H, CH₃),</td><td>1.00 (m,</td>

<td></td><td> 1.70</td><td>(m, 2H, CH₂),</td><td>1.90 (m,</td>

<td> 35</td><td> 5.68</td><td>(OCH₂O).</td><td></td>

¹³C NMR (75 MHz, CDCl-J: δ,

<td colspan="3">md:</td>

<td>2H,</td><td>CH₂), 1.39</td><td>(m, 2H, CH₂),</td>

<td>3H,</td><td>CH₃), 4.20</td><td>(t, 2H, CH₂O),</td>

md:

13.54 (CH₃CH₂), 18.73 (CH₂), 30.39 (CH₂), 46.26 (C-CH₃), 69.72 (CH₂O), 83.67 (-OCH₂O), 153.86 (C = O), 175.80 (C = 0).

A differential scanning calorimeter (DSC) showed an initial decomposition temperature of 239.9 ° C (This was not observed). Thermal mechanical analysis showed 24.7^dC glass transition temperature.

Molecular Sieve Chromatography (SEC): M.sv. = 60000, M.sk. = 29000, M.sv./M.sk.=2.1.

EXAMPLE

Copolymer of butyl methacryloxymethyl carbonate and acrylamide

The monomers were butyl methacryloxymethyl carbonate (250 g) and acrylamide (250 mg) dissolved in THF (5 mL). The radical polymerization initiator AIBN (1 mg) was added.

The solution was polymerized at 60 ° C for 2 hours. The product was precipitated with water.

4 EXAMPLE

General method for the preparation of chloromethyl carbonates

To a solution of chloromethyl chloroformate and selected alcohol 30 in methylene chloride (200 mL) was added pyridine at 0 ° C. After 20 min at 0 ° C and 24 h at 25 ° C, the reaction mixture was washed with dilute hydrochloric acid (1M, 10 mL), saturated aqueous sodium bicarbonate (10 mL), and water (10 mL). The solvent was removed under reduced pressure after drying over MgSO4₄, and the crude chloromethyl carbonate obtained was obtained.

table

<td>Pavyz- dys</td><td>Chiorometric chloroformate g, mmol</td><td>Alcohol, ROH R, (g, mmo1)</td><td>Pyridine g, mmol</td>

<td>4a</td><td> 25.01, 194</td><td>CH₃ (5.64, 176)</td><td> 15.52, 194</td>

<td>4b</td><td> 15.81, 124</td><td>CH₃CH₂ (5.20, 113)</td><td> 9.91, 124</td>

<td>4c</td><td> 20.01, 155</td><td>CH₃(CH₂)₉, (22.25, 139)</td><td> 12.54, 157</td>

<td>4d</td><td> 20.02, 155</td><td>PhCH₂, (15.23, 141)</td><td> 12.54, 157</td>

(a) Methyl chloromethyl carbonate

The compound was obtained from chloromethyl chloroformate and methanol.

⁴1 H NMR (60 MHz, CDCl 3)₃); δ, md:

3.98 (s, 3H, OCH₃), 5.85 (s, 2H, CH₂C1).

(b) Ethyl chloromethyl carbonate

<td>The compound of ethanol.</td><td>was obtained from</td><td>of chloromethyl chloroformate</td><td>and</td>

<td>^:Ή BMR (60</td><td>MHz, CDCl₃); δ,</td><td>md:</td><td></td>

<td>1.25 (t, OCH₂C1).</td><td>3H, CH₃), 4.25</td><td>(ss, 2H, CH₂), 5.70 (s,</td><td>2H,</td>

<td>c) Decilo</td><td colspan="2">chloromethyl carbonate</td><td></td>

<td>The compound</td><td>was obtained from</td><td>of chloromethyl chloroformate</td><td>and</td>

decyl alcohol.

^ΧΗ NMR (60 MHz, CDCl1)₃); δ, md:

0.90-1.50 (m, 19H, CH₃ and CH₂), 4.20 (m, 2H, CH)₂O), 5.75 (s, 2H, OCH)₂C1).

(d) Benzyl chloromethyl carbonate

The compound was obtained from chloromethyl chloroformate and benzyl alcohol.

^ΧΗ NMR (60 MHz, CDCl1)₃); δ, md:

5.20 (s, 2H, PhCH₂O), 5.70 (s, 2H, ClCH)₂O), 7.32 (s, 5H, Ph).

EXAMPLE

General procedure for the preparation of methacryloxymethyl carbonates

Potassium tert-butoxide was added to a solution of methacrylic acid in DMF (200 mL). Chloromethyl carbonate from Example 4 was added to the resulting suspension. Then 18-crown-6 was added and the mixture was stirred at room temperature for 24 hours. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was dissolved in chloroform (30 mL) and washed with saturated aqueous sodium bicarbonate solution (10 mL) and water (20 mL). The organic layer was dried over MgSO 4₄ and the solvent was removed under reduced pressure.

table

<td>Pavyz- dys</td><td>Compound g, mmol</td><td>Potassium Meta- krill (g, mmol)</td><td>18-blood nas-6 (g, mmol)</td><td>DMF (ml)</td>

<td>5a</td><td>4a, (9.67, 78)</td><td> 8.71, 78</td><td> 1.01, 38</td><td> 350</td>

<td>5b</td><td>4b, (8.04, 60)</td><td> 6.73, 60</td><td> 0.6, 23</td><td> 300</td>

<td>5c</td><td>4c, (30.61, 122)</td><td> 13.67, 122</td><td> 2.5, 94</td><td> 600</td>

<td>5d</td><td>4d, (Jan 22, 110)</td><td> 13.64, 110</td><td> 1.5, 57</td><td> 550</td>

(a) Methyl methacryloxymethyl carbonate

The compound was obtained from methyl chloromethyl carbonate and potassium methacrylate.

IR (KBr): 1772 (C = 0), 1737 (C = 0), 1635 (C = C) cm¹

Έ NMR (300 MHz, CDCl1)₃); 5, MD:

1.91 (s, 3H, CH)₃C =), 3.79 (s, 3H, CH)₃O), 5.64 (m, 1H,

CH₂=), 5.80 (s, 2H, -OCH)₂O-), 6.16 (m, 1H, CH)₂=) .

ⁱ⁵C NMR (75 MHz, CDCl 3)₃); δ, md:

17.95 (CH₃C =), 55.13 (CH₃O), 82.18 (-OCH₂O-), 127.52 (CH₂=), 135.02 (C =), 154.44 (C = O), 165.46 (C = 0).

(b) Ethyl methacryloxymethyl carbonate

The compound was obtained from ethyl chloromethyl carbonate and potassium methacrylate.

IR (KBr): 1772 (C = 0), 1736 (C = 0), 1635 (C = C) cm¹

NMR (300 MHz, CDCl 1)₃): δ, md:

1.27 (t, 3H, CH₃), 1.92 (s, 3H, CH)₃C =), 4.23 (kv, 2H, CH)₂), 5.66 (m, 1H, CH)₂=), 5.80 (s, 2H, -OCH)₂O-), 6.20 (m, 1H, CH)₂=) .

¹³C NMR (75 MHz, CDCl 3)₃): δ, md:

15.70 (CH₃CH₂), 19.60 (CH₃C =), 65.72 (CH₂O), 83.05 (OCH₂O-), 127.76 (CH₂=), 135.40 (C =), 153.82 (C = 0),

165.42 (C = 0).

(c) Decyl methacryloxymethyl carbonate

The compound was obtained from decyl chloromethyl carbonate and potassium methacrylate.

IR (KBr): 1772 (C = 0), 1763 (C = 0), 1635 (C = C) cm¹^X1 H NMR (300 MHz, CDCl 3)₃): δ, md:

0.90 (t, 3H, CH₃), 1.28 (m, 14H, CH)₂), 1.72 (m, 2H, CH)₂), 1.99 (s, 3H, CH)₃C =), 4.21 (t, 2H, CH₂O), 5.70 (m, 1H, CH)₂=), 5.86 (s, 3H, -OCH)₂O-), 6.24 (m, 1H, CH)₂=) .

^L3C NMR (75MHz, CDCl 1)₃): δ, md:

13.78 (CH₃), 17.76 (CH₃C =), 22.76-31.55 (CH₂), 68.60 (CH₂O), 81.90 (-OCH₂O), 127.28 (CH₂=), 134.86 (C =),

153.73 (C = O), 165.33 (C = O).

(d) Benzyl methacryloxymethyl carbonate

The compound was obtained from benzyl chloromethyl carbonate and potassium methacrylate.

IR (KBr): 3077 (Ph) 1772 (C = O), 1763 (C = O), 1635 (C = C)

-i cm ^X1 H NMR (300 MHz, CDCl 3)₃); δ, md:

1.96 (s, 3H, CH₃C =), 5.22 (s, 2H, CH)₂O), 5.70 (m, 1H,

CH₂=), 5.87 (s, 3H, -OCH)₂O-), 6.22 (m, 1H, CH)₂=), 7.39 (s, 5H, Ph).

¹³C NMR (75 MHz, CDCl 3)₃); δ, md:

17.96 (CH₃C =), 69.91 (CH₂O), 82.03 (-OCH₂O-), 127.41 (CH₂=), 128.32 (Ph), 134.78 (C =), 153.58 (C = O), 165.28 (C = O).

EXAMPLE

Method for the preparation of polymethacryloxymethyl carbonates

Methacryloxymethyl carbonate from Example 5 DMF (8.0 g) was heated to 60^uC and AIBN (0.005 g, 0.03 mmol) was added. After 24 hours, the reaction mixture was cooled and the polymer solution added dropwise to a large volume of methanol (not solvent). The polymer was filtered off and washed with methanol / water and dried under reduced pressure.

(a) Polymer of methyl methacryloxymethyl carbonate

IR (KBr): 1763 (C = O, str.) Cm ¹ 1 H NMR (300 MHz, CDCl 3)₃): δ, md:

1.00 (m, 2H, CH)₂), 1.90 (m, 3H), 3.85 (s, 3H, CH)₃O),

5.70 (s, 2H, OCH₂O).

¹³C NMR (75 MHz, CDCl 3)₃): δ, md:

46.35 (C-CH₃), 56.55 (CH₃O), 83.59 (-OCH₂O-), 154.41 (C = O), 175.50 (C = O).

A differential scanning calorimeter (DSC) showed that Ts = 59.8 ° C and the initial decomposition temperature was 242.2 ° C. Thermal mechanical analysis showed a glass transition temperature of 59.9 ° C.

Molecular Sieve Chromatography (SEC): M.sv. = 100000, M.sk. = 59000, M.sv./M.sk.=l.7.

(b) Polymer of ethyl methacryloxymethyl carbonate.

IR (KBr): 1763 (C = O, str.) Cm¹^ΧΗ NMR (300 MHz, CDCl1)₃); δ, md:

1.00 (m, 2H, CH)₂), 1.32 (t, 3H, CH₃), 1.90 (m, 3H, CH)₃), 4.25 (m, 2H, CH)₂O), 5.70 (s, 2H, OCH)₂O).

¹³C NMR (75 MHz, CDCl 3)₃); 5, MD:

15.77 (CH₃CH₂), 46.35 (C-CH₃), 65.90 (CH₂O), 83.50 (OCH₂O-), 153.69 (C = O), 175.80 (C = O).

A differential scanning calorimeter (DSC) showed Ts = 35.9 ° C and an initial decomposition temperature of 260.9'C. Thermal mechanical analysis revealed a glass transition temperature of 31.2 ° C. Molecular Sieve Chromatography (SEC): M.sv. = 34000, M.sk. = 20000, M.sv./Ms=1.7.

(c) Polymer of decyl methacryloxymethyl carbonate.

IR (KBr): 1763 (C = O, str.) Cm ^X1 H NMR (300 MHz, CDCl 3)₃); δ, md:

<td> 90</td><td>(t,</td><td>3H,</td><td>CH₃),</td><td> 0.90</td><td>(3H, CH₂),</td><td> 1.30</td><td>(m, 14H,</td><td>CH₂) ,</td>

<td> 70</td><td>(m,</td><td>2H,</td><td>CH₂) ,</td><td> 1.90</td><td>(m, 2H),</td><td> 4.19</td><td>(t, 2H,</td><td>CHO),</td>

<td> 66</td><td>(s,</td><td>2H,</td><td>OCH₂O)</td><td> •</td><td></td><td></td><td></td><td></td>

¹³C NMR (75 MHz, CDCl 3)₃): δ, md:

13.78 (CH₃), 22.34-31.57 (CH₂), 46.26 (C-CH₂), 68.70 (CH₂O), 83.67 (-OCH₂O-), 153.55 (C = O), 175.80 (C = O).

A differential scanning calorimeter (DSC) showed an initial decomposition temperature of 232.9 ° C (Ts not observed). Thermal mechanical analysis showed a glass transition temperature of -3.3 ° C. Molecular Sieve Chromatography (SEC): M.sv. = 160000, M.sk. = 90000, M.sv./M.sk.=1.7.

(d) Polymer of benzyl methacryloxymethyl carbonate.

IR (KBr): 3077 (Ph), 1763 (C = O, str.) Cm¹^:1 H NMR (300 MHz, CDCl 3)₃): δ, md:

0.95 (m, 3H, CH)₃), 1.90 (m, 2H), 5.25 (s, 2H, CH)₂O), 5.75 (s, 2H, OCH)₂O), 6.70 (s, 5h, Ph).

¹³C NMR (75 MHz, CDCl 3)₃): δ, md:

46.26 (-C-CH₃), 68.03 (-OCH₂Ph), 82.02 (-OCH₂O-), 129.45 (Ph), 153.67 (C = O), 175.80 (C = O).

A differential scanning calorimeter (DSC) showed that Ts = 31.6 ° C and the initial decomposition temperature was 197.1 ° C. Thermal mechanical analysis revealed a glass transition temperature of 32.8 ° C. Molecular Sieve Chromatography (SEC): M.sv. = 92000, M.sk. = 44000, M.sv./M.sk.=2.1.

EXAMPLE

Radical polymerization of benzyl methacryloxymethyl carbonate in low molecular weight polymer solution

A solution of benzyl methacryloxymethyl carbonate (0.5 g, 2.0 mmol) from Example 5d in DMF (7.5 g) was heated to 60 ° C and allyl mercaptan (0.0015 g, 0.02 mmol) was added along with AIBN (0.0025 g, 0.015 mmol). After 24 hours, the reaction mixture was cooled and the polymer solution was added dropwise (not solvent). Polymer with methanol and water and under pressure. High molecular weight methanol sieves were filtered, rinsed dried under reduced chromatography (SEC): m.p. = 22000,

EXAMPLE

M.sk = 14000, M.sv./M.sk.=1.6.

Radical polymerization of ethyl methacryloxymethyl carbonate and methacrylic acid in solution

A monomer feed mixture of ethyl methacryloxymethyl carbonate from Example 5b and methacrylic acid in DMF (8.0 g) heated to 60 ° C was added AIBN (0.005 g, 0.03 mol). After 24 hours, the polymer solution was added dropwise to a stirred large amount of chloroform (not solvent), filtered, washed with chloroform, and dried under reduced pressure.

<td>Pavyz-</td><td>Methacrylic</td><td>Ethyl Metacritic</td><td>The molar ratio</td>

<td>dys</td><td>acid</td><td>oxymethyl carbonate</td><td>methacrylic acid:</td>

<td></td><td>(g, mmol)</td><td>it (g, mmol)</td><td>5b</td>

<td>8a</td><td> 0.73, 8.48</td><td> 0.25, 1.33</td><td> . 86:14</td>

<td>8b</td><td> 0.73, 8.48</td><td> 0.17, 0.90</td><td> 90:10</td>

<td>8c</td><td> 0.73, 8.48</td><td> 0.14, 0.74</td><td> 92:8</td>

<td>8d</td><td> 0.92, 10.7</td><td> 0.08, 0.43</td><td> ’ 96:4</td>

^X1 H NMR (200 MHz, CDCl 1)₃); δ, md:

1.10 (s, 6H, 2xCH)₃), 1.27 (t, 3H, CH₃CH₂), 1.90 (s, 4H, 2xCH)₂), 3.52 (pi s, 1H, OH), 4.20 (m, 2H, CH)₃CH₂), 5.72 (s, -OCH₂O-) table

<td>An example</td><td>Solubility (cold water)</td><td>Solubility (hot water)</td>

<td>8a</td><td>Yeah</td><td>Yeah</td>

<td>8b</td><td>Yeah</td><td>Yeah</td>

<td>8c</td><td>Yeah</td><td>Slight</td>

<td>8d</td><td>Completely *</td><td>Absolutely</td>

* Completely dissolves only after a relatively long dissolution time.

EXAMPLE

Ethyl 1-chloroethyl carbonate

To a solution of 1-chloroethyl chloroformate (23.16 g, 0.162 mol) and ethanol (7.45 g, 0.162 mol) in methylene chloride (200 mL) was added pyridine (12.82 g, 0.162 mol) at 0 ° C. After 10 minutes at 0 ° C and 21 hours at 25 ° C, the reaction mixture was washed with dilute hydrochloric acid (100 mL), aqueous saturated sodium bicarbonate (100 mL), and water (100 mL). The solvent was removed under reduced pressure after drying over MgSO4₄18.5 g (74%) of crude ethyl chloroethyl carbonate intermediate are obtained.

²1 H NMR (60 MHz, CDCl 3)₃); δ, md:

1.30 (t, 3H, CH 3), 1.85 (d, 3H, CH₃CH), 4.25 (kv, 2H,

CHJ, 6.45 (kv, 1H, CH).

EXAMPLE

Ethyl 1-methacryloxyethyl carbonate

Potassium tert-butoxide (37 g, 0.033 mol) was added to a solution of methacrylic acid (2.84 g, 0.033 mol) in DMF (100 ml). Ethyl 1-chloroethyl carbonate (5.08 g, 0.033 mol) from Example 9 was added to the resulting suspension. Then 18-crown-6 (0.61 g, 2.3 mmol) was added and the reaction mixture was left at room temperature for 3 days with continuous stirring. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was dissolved in chloroform (100 mL) and washed with saturated aqueous sodium bicarbonate solution (50 mL) and water (50 mL). The organic layer was dried over

<td colspan="2">MgSO₄, solvent removed</td><td>in reduced</td><td>under pressure.</td>

<td>Impulsive</td><td>chromatography gave</td><td>2.50 g (38%)</td><td>to the desired</td>

<td>j unginio.</td><td>After you enter a patch for</td><td>reclaimed</td><td>initial</td>

<td>materials</td><td>yield was 75%).</td><td></td><td></td>

<td>^lH NMR (60</td><td>MHz, CDCl₃); δ, md:</td><td></td><td></td>

<td>1.30 (t,</td><td>3H, CH₃), 1.60 (d, 3H,</td><td>CH₃CH), 2.00</td><td>(s, 3H,</td>

CH₃C =), 4.20 (kv, 2H, CH)₂), 5.70 (m, 1H, CH)₂=), 6.25 (kv, 1H, -OCH (CH₃O-), 6.90 (m, 1H, CH)₂=) .

EXAMPLE

Radical polymerization of ethyl 1-methacryloxyethyl carbonate

AIBN (0.033 g, 0.02 mmol) was added to a solution of ethyl 1 methacryloxyethyl carbonate (0.504 g, 2.49 mmol) from Example 10 in dry THF (8 mL) at 50 ° C under a dry nitrogen atmosphere. After 7 hours, the reaction mixture was cooled to 20 ° C, the polymer was precipitated with methanol (50 mL) and the solution was filtered. The resulting polymer was dissolved in THF, re-precipitated with methanol (70 mL) and filtered to give 0.138 g of a white powder.

²Η NMR (60 MHz, CDCl1)₃); δ, md:

0.90 (m, 3H, CH)₃), 1.25 (s, 3H, CH)₃), 1.45 (s, 3H, CH)₃), 1.87 (m, 2H, CH)₂), 4.15 (pi, 2H, CH)₂O), 6.62 (pi s, 1H, -CHCH)₃) .

Molecular Sieve Chromatography (SEC): M.sv. = 26500, M.sk. = 18600, Mp = 22000, M.sv./M.sk.=1.43.

EXAMPLE

Polymer of emulsion polymerization of ethyl methacryloxymethyl carbonate

A solution of sodium dodecyl sulfate (0.056 g, 0.19 mmol) in water (20.5 mL) was warmed to 60 ° C under nitrogen before adding ethyl methacryloxymethyl carbonate (5.266 g, 28.00 mmol) from Example 6b. The polymerization was initiated with a redox system of potassium metabisulfite (53.4 mg, 0.24 mmol) potassium persulfate (4.38 mg, 0.02 mmol). After 16 hours at 60 ° C, potassium persulfate (4.38 mg, 0.02 mmol) was added and the polymerization was allowed to proceed for a further 3 hours at 60 ° C under nitrogen before cooling to 20 ° C.

EXAMPLE

O-Acetoxymethyl-S-ethylcarbonothioate

O-Chloromethyl-S-ethylcarbonothioate¹ (4.50 g, 0.028 mol) of DMF (20 mL) was added to a solution of potassium acetate (2.74 g, 0.028 mol) in THF (100 mL). Then 18 crown-6 (0.22 g, 0.84 mmol) was added and the mixture was left stirring at room temperature for 3 days. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was purified by flash chromatography (silica gel, chloroform) to give 4.23 g (85%) of the desired product.

^ΣΗ NMR (60 MHz, CDCl1)₃); δ, md:

1.30 (t, 3H, CHH₃CH₂), 2.20 (s, 3H, CH)₃CO), 2.95 (sq,

2H, CH₂CH₃), 5.80 (s, 2H, OCH)₂O).

EXAMPLE

Acetoxymethyl chloroformate

SO₂C1₂ (2.43 g, 0.018 mol) was added to O-acetoxymethyl S-ethylcarbonothionate (3.15 g, 0.018 mol) from Example 13 with stirring at 0-5 ° C for 15 minutes, followed by stirring at room temperature for 45 minutes. Evaporation of EtSCl at room temperature and a pressure of 11 mmHg gave a colorless liquid. Yield: 2.44 g (89%).

^ΤΗ NMR (60 MHz, CDCl1)₃); δ, md:

2.20 (s, 3H, CH)₃C = OO), 5.76 (s, 2H, OCH)₂O).

EXAMPLE

Acetoxymethyl 2-methacryloxyethyl carbonate

To a solution of acetoxymethyl chloroformate (1.00 g, 0.0066 mol) and 2-hydroxyethyl methacrylate (0.86 g, 0.0066 mol) in methylene chloride (30 ml) was added pyridine (0.52 g, 0.0066 mol) at 0 ° C. After 10 minutes at 0 ° C and 18 hours at 25 ° C, the reaction mixture was washed with dilute hydrochloric acid (100 mL), saturated sodium bicarbonate solution (100 mL), and water (100 mL). The solvent was removed under reduced pressure after drying over MgSO4₄. Flash chromatography (silica gel, hexane / ethyl acetate (3: 2)) gave 1.05 g (65%) of the desired product.

^:1 H NMR (60 MHz, CDCl 3)₃); δ, md:

1.95 (d, 3H, CH₃C =), 2.10 (s, 3H, CH)₃C = 0), 4.45 (s, 4H,

CH₂O), 5.55 (m, 1H, CH)₂=), 5.75 (s, 2H, -OCH)₂O-), 6.05 (m, 1H, CH)₂=).

16th EXAMPLE

N- (2-Chloromethoxycarbonyloxypropyl) methacrylamide

To a solution of d- (2-hydroxypropyl) methacrylamide (2.86 g, 20 mmol) and pyridine (1.90 g, 24 mmol) in methylene chloride (100 mL) was added chloromethyl chloroformate (3.87 g, 30 mmol) in methylene chloride (120 mL). At 0C. After 15 minutes at 0 ° C and hours at 25 ° C, the reaction mixture was washed with water (5 x 25 mL). The solvent was removed under reduced pressure after drying over MgSO 4 to give 3.30 g (70%) of the title compound by flash chromatography (silica gel, chloroform).

Έ NMR (60 MHz, CDCl1)₃); δ, md:

1.42 (d, 3H, CH 3 -CH-O), 2.00 (m, 3H, CH)₃C =), 3.2-4.0 (m, 2H, NH-CH)₂-CH), 4.8-5.3 (m, 1H, CH)₃-CH-O), 5.60 (d, 2H,

CH₂=), 5.70 (s, 2H, CH₂C1), 6.10-6.70 (pi s, 1H, NH).

EXAMPLE

a) N- (2-Acetoxymethoxycarbonyloxypropyl) methacrylamide

A solution of TBA acetate (1.21 g, 4 mmol) in THF prepared by freeze-drying an aqueous equimolar solution of TBA-OH and acetic acid was added to a stirred solution of N- (2-chloromethoxycarbonyloxypropyl) methacrylamide (0.943 g, 4 mmol) in THF at room temperature. After stirring for 5 days, the solvent was removed under reduced pressure, the residue dissolved in chloroform (50 mL) and washed with water (5 x 10 mL). The organic phase was dried over MgSO 4₄, and the solvent was removed under reduced pressure. Flash chromatography (silica gel, hexane / ethyl acetate (3: 4)) gave 0.486 g (47%) of the desired product.

* Η NMR (60 MHz, CDCl₃); δ, md:

1.40 (d, CH 3 -CH-O), 2.00 (m, 3H, CH)₃C =), 2.2 (s, 3H, CH)₃-C = O), 3.2-4.0 (m, 2H, NH-CH)₂-CH), 4.8-5.3 (m, 1H, CH)₃-CH-O), 5.60 (d, 2H, CH)₂=), 5.80 (s, 2H, OCH₂O),

6.10-6.70 (pi s, 1H, NH).

b) N- (2-Acetoxymethoxycarbonyloxypropyl) methacrylamide

To N- (2-hydroxypropyl) methacrylamide² (0.43 g, 3.0 mmol), and pyridine (0.285 g, 3.6 mmol) in methylene chloride (30 mL) were added acetoxymethyl chloroformate from Example 14 (0.5 g, 3.3 mmol) in methylene chloride (6 mL) at 0 ° C. After 10 minutes at 0 ° C and 3 days at 25 ° C, the reaction mixture was washed with water (100 mL). The solvent was removed under reduced pressure after drying over MgSO4₄. Flash chromatography (silica gel, hexane / ethyl acetate (3: 4)) gave 0.40 g (51%) of the desired product.

The NMR data are consistent with the data in (a).

EXAMPLE

Radical polymerization of N- (2-acetoxymethoxycarbonyloxypropyl) methacrylamide

AIBN (0.0138 g, 0.084 mmol) was added to a solution of N- (2-acetoxymethoxycarbonyloxypropyl) methacrylamide (0.519 g, 2 mmol) from Example 17 in dry THF (8 mL) at 50 ° C under a dry nitrogen atmosphere. After 3 days, the solvent was removed under reduced pressure to give 0.439 g of a white powder.

1 H NMR (200 MHz, CDCl 3, md:

0.8-1.2 (m,. 6-2.0 (m,

2H, NH-CH₂), 1H, NH).

3H, CH₃), 1.2-1.4 (m, 3H, CH, -CH (CH₃) O),

2H, CH₂), 2.1 (s, 3H, CH-, CO), 2.9-3.9 (m,

4.7-5.0 (m, 1H, CH₂CH (CH₃) -O), 6.2-7.0 (m,

Molecular Sieve Chromatography (SEC): M.sv. = 5411, M.sk. = 2857, M.sv./M.sk.=1.894.

A differential scanning calorimeter (DSC) showed Ts = 52.91 ° ​​C.

EXAMPLE

N- [2- (1-Chloroethoxycarbonyloxy) propyl] methacrylamide

To N- (2-hydroxypropyl) methacrylamide² (3.15 g, 22 mmol), and pyridine (2.088 g, 26.4 mmol) in methylene chloride (100 mL) were added 1-chloroethyl chloroformate (4.718 g, 33 mmol) in methylene chloride (20 mL) at 0 ° C. After 10 minutes at 0 ° C and 5.5 hours at 25 ° C, the reaction mixture was washed with water (5x40 mL). The solvent was removed under reduced pressure after drying over MgSO4₄to give 4.84 g (88%) of the title compound.

G NMR (60 MHz, CDCl3)₃); δ, md:

1.37 (d, 3H, CH₃-CH-O), 1.83 (d, 3H, CH)₃-CH-Cl), 1.97 (m, 3H, CH)₃C =), 3.3-3.6 (m, 2H, NH-CH)₂-CH), 4.7-5.3 (m, 1H, CH)₂-CH (CH₃-O), 5.3 (m, 1H, CH)₂=), 5.70 (m, 1H,

CH₂=), 6.0-6.6 (m, 2H, NH + -C 1 -CH-CH)₃) .

EXAMPLE

N- [2- (1-Acetoxyethoxycarbonyloxy) propyl] methacrylamide

A solution of TBA acetate (6.93 g, 23 mmol) in THF (100 mL), prepared by freeze-drying an aqueous equimolar solution of TBA-OH and acetic acid, was added to stirring N- [2- (1-chloroethoxycarbonyloxy) propyl] meta20 crilamide (4.736 g). , 19 mmol) in THF (100 mL) at room temperature. After stirring for 4 days, the solvent was removed under reduced pressure, the residue was dissolved in chloroform (100 mL) and washed with water (5 x 20 mL). The organic phase was dried over MgSO 4₄ and the solvent was removed under reduced pressure. Flash chromatography (silica gel, hexane / ethyl acetate (3: 4)) gave 1.29 g (25%) of the title product.

NMR (60 MHz, CDCl 1)₃); δ, md:^:³⁰

1.3 (d, 3H, CH₂-CH (CH₃-O), 1.50 (d, 3H, O-CH (CH₃) O),

2.00 (m, 3H, CH)₃C =), 2.1 (s, 2H, CH)₃C = O), 3.3-3.6 (m,

2H, NH-CH₂-CH), 4.7-5.3 (m, 1H, CH)₂-CH (CH₃) .- (O), 5.4 (m, 1H, CH)₂=), 5.7 (m, 1H, CH₂=), 6.1-6.6 (pi s, 1H, NH),

6.6-6.9 (m, 1H, CH (CH₃) O).

EXAMPLE

Radical polymerization of N- [2- (1-acetoxyethoxycarbonyloxy) propyl] methacrylamide

AIBN (0.0031 g, 0.189 mmol) was added to a solution of N- [2- (lacethoxyethoxycarbonyloxy) propyl] methacrylamide (1.23 g, 4.5 mmol) from Example 20 in dry THF (18 mL) at 50 ° C under a dry nitrogen atmosphere. After three days, the solvent was removed under reduced pressure. Flash chromatography (step gradient, hexane / ethyl acetate (3: 4) to methanol) gave 0.96 g of a white powder.

Έ NMR (200 MHz, CDCl3; δ, md:

<td></td><td>0.8-1.2 (m, 3H, CH₃)</td><td> , 1.2-1.4</td><td>(m,</td><td>3H, CH₂-CH (CH₃) O),</td><td> 1.5</td>

<td></td><td>(d, 3H, O-CH (CH₃) -O)</td><td> 1.6-2.0</td><td>(m,</td><td>2H, CH₂) , 2.0-2.2</td><td>(s,</td>

<td></td><td>3H, CH₃CO), 2.9-3.9</td><td>(m, 2H,</td><td>NH-</td><td>-CH₂), 4.7-5.0 (m,</td><td>1H,</td>

<td> 20</td><td>CH₂CH (CH₃) -0) , 6.2-7,</td><td>.0 (m, 2H,</td><td>NH</td><td>+ O-CH (CH₃) -0) .</td><td></td>

Molecular Sieve Chromatography (SEC): M.sv. = 1991,

M.sk = 1268, M.sv./M.sk.=1.548.

A differential scanning calorimeter (DSC) showed Ts = 51.53 ° C.

EXAMPLE

Methacryloxymethylbenzoate

Potassium tert. butoxide (10.0 g, 0.09 mol) was added to a solution of methacrylic acid (7.75 g, 0.09 mol) in DMF (300 ml). Chloromethyl benzoate³ (15.0 g, 0.088 mol) was added to the resulting suspension. Then 18-crown-6 (1.8 g, 6.9 mmol) was added and the reaction mixture was allowed to stir at room temperature for 2 days. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was dissolved in chloroform (100 mL) and washed with saturated aqueous sodium bicarbonate solution (50 mL) and water (50 mL). The organic phase was dried over MgSO 4₄ and the solvent was removed under reduced pressure. Flash chromatography gave 15.9 g (82%) of the title compound.

^T1 H NMR (60 MHz, CDCl 3)₃); δ, md:

2.00 (s, 3H, CH)₃C =), 5.65 (m, 1H, CH)₂=), 6.15 (s, 2H, OCH₂O), 6.35 (m, 1H, CH)₂=), 7.50 (m, 3H, Ph), 8.05 (m, 2H, Ph).

EXAMPLE

Polymer of methacryloxymethylbenzoate

AIBN

10.005

A solution of methacryloyloxymethyl benzoate (1.0 g, 4.55 mmol) from Example 22 in dry THF (8 g) at 60 ° C was added. After 24 hours, the mixture was cooled to dryness under nitrogen atmosphere.

C, solvent removed under reduced pressure. The resulting polymer was dissolved in CH₂C1₂and re-precipitated with 'methanol. Methanol was separated from the polymer by filtration to give a white powder per kg.

NMR (200 MHz, CDCl 1)₃); δ, md:

0.85 (m, 3H, CH)₃), 1.87 (m, 2H, CH)₂), 5.70 (m, 2H, OCH)₂O), 7.45 (m, 3H, Ph), 8.05 (m, 2H, Ph).

A differential scanning calorimeter (DSC) showed Ts = 60.98 ° C.

Molecular Sieve Chromatography (SEC): M.p. = 11580, Mp = 32286 M.sv./M.sk.=2.615.

M.v. = 30281,

EXAMPLE

Methyl chloroethyl carbonate

To a solution of chloroethyl chloroformate (35.74 g, 0.25 mol) and methanol (8.00 g, 0.25 mol) in methylene chloride (300 ml) was added pyridine (19.78 g, 0.25 mol) at 0 ° C. After 10 minutes

The reaction mixture was washed with dilute hydrochloric acid (100 mL), saturated sodium bicarbonate solution (100 mL), and water (100 mL) at 0 ° C and two days at 25 ° C. The solvent was removed under reduced pressure after drying over MgSO4₄ 25.5 g (74%) of the crude methyl chloromethyl carbonate are obtained.

^X1 H NMR (60 MHz, CDCl 3)₃); δ, md:

2.00 (d, 3H, CH₃CH), 3.80 (s, 3H, CH₃O), 6.50 (sq, 1H,

CH).

EXAMPLE

Methyl 1-methacryloxyethyl carbonate

Potassium tert. butoxide (3.7 g, 0.033 mol) was added to a solution of methacrylic acid (2.84 g, 0.033 mol) in DMF (100 mL). Methyl chloroethyl carbonate from Example 24 (4.55 g, 0.033 mol) was added to the resulting suspension. 18-Crown-6 (0.61 g, 2.3 mmol) was then added and the mixture was stirred at room temperature for 3 days. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was dissolved in chloroform (100 mL) and washed with saturated sodium bicarbonate solution and water (50 mL). The organic phase was dried over MgSO 4₄ and the solvent was removed under reduced pressure. Flash chromatography gave 4.46 g (72%) of the title product.

^X1 H NMR (60 MHz, CDCl 3)₃); δ, md:

1.65 (d, 3H, CH)₃CH), 2.00 (s, 3H, CH₃C =), 3.90 (s, 3H,

CH₃O), 5.65 (m, 1H, CH)₂=), 6.25 (m, 1H, CH₂=), 6.90 (kv, 1H, CHCH3).

EXAMPLE

Radical polymerization of methyl 1-methacryloyloxyethyl carbonate

AIBN (0.005 g, 0.03 mmol) was added to a solution of methyl 1-methacryloyloxyethyl carbonate (1.0 g, 5.0 mmol) in dry THF (8 g) at 60 ° C under a dry nitrogen atmosphere. After 24 hours, the reaction mixture was cooled to 20 ° C and the solvent removed under reduced pressure. The resulting polymer was dissolved in CH₂C1₂ and re-precipitated with methanol. The methanol was separated from the polymer by filtration to give a white powder.

²Η NMR (200 MHz, CDCl3; δ, md:

0.90 (m, 3H, CH 1) 1.45 (s, 3H, CH₃CH), 1.87 (m, 2H,

CH3, 3.80 (s, 3H, CH₃O), 6.65 (pis, 1H, CHCH3).

EXAMPLE

Radical Emulsion Homopolymerization of Benzyl Methacryloxymethyl Carbonate

Sodium dodecyl sulfate (1.6x10² mmol) solution in deoxygenated water (6.0 ml) was added to a 50 ml round bottom flask with two necks fitted with a magnetic stirrer and a condenser. To the solution was added potassium metabisulfate (0.015 g, 6.7x10 ~² mmol) dissolved in deoxidized water and benzyl methacryloxymethyl carbonate. The reaction mixture was heated to 60 ° C. To the heated reaction mixture was added potassium persulfate (1.25 x 10³ g, 4.6x10 ³ mmol) and allowed to proceed. After about 5 hours, the polymerization was stopped and the polymer emulsion was added dropwise to the very high methanolic polymer filtered off with water. This procedure is the amount (not solvent). It was then washed with methanol and repeated three times to purify the polymer. The polymer was then collected and dried under vacuum to remove any solvent impurities. A portion of the stable emulsion was not extracted as before but was stored for particle size analysis by light microscopy. Particle size of emulsion / assessed by optical microscopy and found to be less than 1 µm in diameter.

EXAMPLE

Methacryloxymethyl acetate

Potassium tert. butoxide (5.0 g, 0.045 mol) was added to a solution of methacrylic acid (3.87 g, 0.045 mol) in DMF (150 mL). Chloromethyl acetate³ (4.86 g, 0.045 mol) was added / resulting suspension. Then 18 crown-6 (0.9 g, 3.45 mmol) was added and the reaction mixture was allowed to stir at room temperature for 4 days. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was dissolved in chloroform (100 mL) and washed with saturated sodium bicarbonate solution (50 mL) and water (50 mL). The organic phase was dried under reduced pressure

MgSO 4, and the solvent was removed under pressure. Pulsed chromatography gave

5.19 g (75%) of the title product, ⁷Η NMR (60 MHz, CDCl1)₃); δ, md:

2.00 (s, 3H, CH)₃C = 2.18 (s, 3H, CH)₃C = O), 5.70 (m, 1H,

CH₂=), 5.85 (s, 2H, -OCH₂O-), 6.25 (m, 1H, CH)₂=) .

EXAMPLE

Butyl acryloxymethyl carbonate

Potassium tert. butoxide (5.84 g, 0.052 mol) was added to a solution of acrylic acid (4.47 g, 0.045 mol) in DMF (220 ml). Butyl chloromethyl carbonate (6.5 g, 0.052 mol) in DMF (150 mL) was added to the resulting suspension. Then 18-crown-6 (0.6 g) was added and the reaction mixture was stirred at room temperature for 2 days. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was dissolved in chloroform (100 mL) and washed with saturated sodium bicarbonate solution (50 mL) and water (50 mL). The organic phase was dried over MgSO 4₄ and the solvent was removed under reduced pressure. Flash chromatography gave 4.57 g of the title compound.

^l1 H NMR (600 MHz, CDCl 3)₃); δ, md:

0.80 (t, 3H, CH₃CH₂), 1.28 (m, 2H, CH)₂), - 1.6 (m, 2H, CH)₂) 4.15 (t, CH₂O), 5.78 (s, 2H, OCH)₂O), 5.88 (dd, 1H, CH₂=), 6.1 (dd, 1H, CH₂=), 6.45 (dd, 1H, CH₂= CH-).

EXAMPLE

Polymer of methacryloxymethyl acetate

AIBN (0.005 g, 0.03 mmol) was added to a solution of methacryloyloxymethyl acetate (Example 28, 1.00 g, 4.55 mmol) in dry THF (8 g) at 60 ° C under a dry nitrogen atmosphere. After 24 hours, the reaction mixture was cooled to 20 ° C and the solvent was removed under reduced pressure. The resulting polymer was dissolved in CH₂C1₂ and re-precipitated with methanol. The methanol was separated from the polymer by filtration to give a white powder.

A differential scanning calorimeter (DSC) showed Ts = 54.99 ° C.

Molecular Sieve Chromatography (SEC): M.sv. = 184678,

M.p. = 2446, Mp = 54732 M.sv./M.sk.=7.56.

EXAMPLE

Polymer of ethyl 1-methacryloyloxyethyl carbonate, emulsion polymerization

A mixture of sodium dodecyl sulfate (6.5 mg, 0.023 mmol) in water (2.4 mL) and potassium metabisulfate (6.3 mg, 0.028 mmol) in water (0.82 mL) was heated to 60 ° C under a nitrogen atmosphere, followed by ethyl 1-methacryloyloxyethyl carbonate (Example 10). , 0.617 g, 3.1 mmol). Polymerization was initiated by the addition of potassium persulfate (0.54 mg, 0.003 mmol) in water (0.25 mL). The polymerization was allowed to proceed for 20 hours at 60 ° C under nitrogen before cooling to 20 ° C.

EXAMPLE

1-Chloro-1-phenylmethylovinyl carbonate

Vinyl chloroformate (3.0 g, 0.028 mol) and benzaldehyde (4.14 g, 0.039 mol) were dissolved in 1,2-dichloroethane (30 ml) and pyridine was added dropwise to the stirred solution. The solution was stirred for 1 day at 80 ° C, washed with water (25 mL), and the aqueous phase was extracted with methylene chloride (25 mL). The combined organic phases were dried over MgSO 4₄ and concentrated to give 3.0 g (50%) of the desired product.

NMR (60 MHz, CDCl 1)₃); δ, md:

4.55 (dd, 1H, CH₂=) 4.95 (dd, 1H, CH₂=), 7.05 (dd, 1H, CH₂= CH-), 7.25 (s, 1H, CH-Ph), 7.40 (m, 5H, Ph).

EXAMPLE

-Actoxicant -1-phenylraethylovinyl carbonate acetate (2.0 g, 0.012 mol) was added to

Example 1 of Example 32 Reaction mixture

Silver chloro-1-phenylmethylovinyl carbonate (2.50 g, 0.012 mol) in DMF (60 mL) was stirred at room temperature for 12 hours. The reaction mixture was filtered and the solvent removed under reduced pressure. The residue was purified by flash chromatography (silica gel, methylene chloride) to give 0.56 g (20% of the title compound).

1 H NMR (60 MHz, CDCl 3)₃); δ, md:

2.24 (s, 3H, CH)₃C = O) 4.60 (dd, 1H, CH)₂=), 4.95 (dd, 1H, CH₂=), 7.00 (dd, 1H, CH =), 7.50 (m, 5H, Ph), 8.00 (s,

1H, -CH-Ph).

EXAMPLE

Radical polymerization of 1-acetoxy-1-phenylmethylovinyl carbonate

AIBN (0.005 g, 0.03 mol) added d,. A solution of 1-cetoxy-1-phenylmethylovinyl carbonate from Example 33 (1.0 g) in dry THF (8.0 mL) at 60 ° C under a dry nitrogen atmosphere. After 12 hours, the solvent was removed under reduced pressure. The resulting polymer is dissolved

CH₂C1₂ and re-precipitated in a suitable diluent. The polymer is separated from the solvent by filtration to give a white powder.

EXAMPLE

O-Benzoyloxymethyl-S-ethylcarbonothionate

O-Chloromethyl-S-Ethyl Carbonothionate¹ (5.73 g, 0.037 mol) DMF (20 mL) was added to a solution of potassium benzoate (5.94 g, 0.037 mol), then 18-crown-6 (0.485 g, 185 mmol) in DMF (130 mL) was added and the reaction mixture was stirred at room temperature. at 24 hours. The solvent was removed under reduced pressure and purified by flash chromatography (silica gel, chloroform) to give 7.16 g (81%) of the desired product.

NMR (60 MHz, CDCl 1)₃); δ, md:

1.3 (t, 3H, CH₃) 2.9 (s, 2H, CH)₂CH₃), 6.1 (s, 2H,

OCH₂O), 7.3-7.7 (m, 3H, Ph), 8.0-8.2 (m, 2H, Ph).

EXAMPLE

Benzoyloxymethyl chloroformate

SO₂S1₂ (4.03 g, 0.03 mol) was added to O-benzoyloxymethylS-ethyl carbothionate from Example 35 (7.16 g, 0.03 mol) at 0-5 ° C with stirring for 15 minutes, followed by stirring at room temperature for 2 hours. Evaporation of EtSCl at room temperature and 11 mmHG gave a yellow liquid. Yield: 5.30 g (83%).

^r1 H NMR (60 MHz, CDCl 3)₃); δ, md:

6.1 (s, 2H, OCH₂O), 7.3-7.7 (m, 3H, Ph), 8.0-8.2 (m,

2H, Ph).

EXAMPLE

N- (3-aminopropyl) methacrylamide

Methacryl chloride (8.0 g, 0.078 mmol) in methylene chloride (10 mL) was added to a solution of 1,3-diaminopropane (35 mL) in methylene chloride (200 mL) at 0 ° C. After stirring for 15 minutes at 0 ° C and for 16 hours at 25 ° C, the reaction mixture was filtered and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, chloroform / methanol (8: 2)) to give (72%) of the title compound.

^ΧΗ NMR (60 MHz, CDCl₃/ d₆-acetone); δ, md:

<td> 1.70</td><td>(m, 2H,</td><td>CH₂CH₂CH₂), 2.00 (s,</td><td>3H,</td><td>CH₃C), 2.30 (s,</td>

<td>2H,</td><td>NH₂) 2.98</td><td>(m, 2H, CH₂NH₂), 3.35</td><td>(m,</td><td>2H, NHCH₂), 5.35</td>

<td>(m,</td><td>1H, CH₂=),</td><td>5.80 (M, 1H, CH₂=), 7</td><td> .45</td><td>(m, 1H, NH).</td>

EXAMPLE

N- (3-methacrylamidoylpropyl) -O- (benzoyloxymethyl) 2 5 -carbamate

Benzoyloxymethyl chloroformate (1 equiv.) Was added to a 0.1 M solution of N- (3-aminopropyl) methacrylamide (2 equiv.) In methylene chloride at 0 ° C. After

15th After 0 minutes at 0 ° C and a suitable time at 25 ° C, the reaction mixture is filtered and concentrated to dryness under reduced pressure. The residue is purified by flash chromatography to give the desired N- (3-methacrylamidoylpropyl) -O- (benzoyloxymethyl) carbamate.

EXAMPLE

Radical polymerization of N- (3-methacrylamidoylpropyl) -O- (benzoyloxymethyl) carbamate in solution

AIBN (3/100 equiv.) Was added to a 1M solution of N- (3-methacrylamidoylpropyl) -O- (benzoyloxymethyl) carbamate (1 equiv.) In THF at 60 ° C. After 24 hours at 60 ° C, the reaction mixture is cooled to 25 ° C and concentrated to dryness under reduced pressure. SEC analysis of the crude product indicates the formation of a polymer.

EXAMPLE

Chloromethylmorpholine-4-carboxylate

Morpholine (1 equiv) was added slowly to a 0.1 M solution of chloromethyl chloroformate (10 equiv) in methylene chloride at low temperature. After 15 minutes at low temperature and a suitable time at 25 ° C, the reaction mixture is filtered and concentrated to dryness under reduced pressure. The residue is purified by flash chromatography to give chloromethyl morpholine-4-carboxylate.

EXAMPLE

Methacryloxyoxymethylomorpholine-4-carboxylate

Chloromethylomorpholine-4-carboxylate (1 equiv) was added to a 0.1 M solution of potassium methacrylic acid (1.1 equiv) and 18-crown-6 (2/100 equiv) in DMF at 0 ° C. After 15 minutes at 0 ° C and a suitable time under elevated temperature, the reaction mixture is filtered and concentrated to dryness under reduced pressure. The residue is purified by flash chromatography to give the desired methacryloxymethylomorpholine-4-carboxylate.

EXAMPLE

Radical polymerization of methacryloxymethylomorpholine-4-carboxylate

AIBN (3/100 equiv.) Is added to a 0.5 M solution of methacryloxy10 methylomorpholine-4-carboxylate (1 equiv.) In THF at 0 ° C. After 24 hours at 60 ° C, the reaction mixture is cooled to 25 ° C and concentrated to dryness under reduced pressure. Molecular sieve chromatography (SEC) shows the formation of a polymer.

EXAMPLE

O-Methacryloxymethyl-S-ethylocarbonothionate

O-Chloromethyl-S-ethylcarbonothionate¹ (1 equiv) is added to a 0.1 M solution of potassium methacrylic acid (1 equiv) and 18-crown-6 (2/100 equiv) in DMF at 0 ° C. After 15 minutes at 0 ° C and a suitable time at elevated temperature, the reaction mixture was filtered and concentrated to dryness under reduced pressure. The residue is purified by flash chromatography to give the desired O-methacryloxyxymethyl-S-ethylcarbothionate.

44 EXAMPLE

Radical polymerization of O-methacryloxyacetyl-S-ethylcarbonothionate

AIBN (3/100 equiv.) Was added to a 0.5 M solution of O-methacryloyloxymethyl-S-ethylcarbonothionate (1 equiv.) In THF at 60 ° C. After 24 hours at 60 ° C, the mixture is cooled to 25 ° C and concentrated to dryness under reduced pressure. Molecular sieve chromatography (SEC) shows the formation of a polymer.

EXAMPLE

Radical copolymerization of N- (2-hydroxypropyl) methacrylamide with N- (2-acetoxy-methoxycarbonyloxypropyl) methacrylamide in solution

N- (2-hydroxypropyl) methacrylamide² (0.430 g, 3.0 mmol) and N- (2-acetoxymethoxycarbonyloxypropyl) methacrylamide (Example 17, 0.778 g, 3.0 mmol) were dissolved in tetrahydrofuran (10 mL) and heated to 55 ° C. AIBN (0.0207 g, 0.126 mmol) was added and the mixture was stirred at 55 ° C for three days until clear jelly formed. These were dissolved in tetrahydrofuran and the solvent was evaporated under reduced pressure to give a white powder (1.33 g).

Molecular sieve chromatography (SEC) showed the formation of a polymer.

EXAMPLE

Enzymatic catalytic hydrolysis of the polymer from methacryloxymethyl benzoate in mg of the polymer sample (Example 23) in fine powder, and 20 ml (9%) aqueous NaCl were added to each of the three reaction flasks. Pigs liver esterase 3.2 M (NH 4) was also added to one of the bottles₄)₂SO₄. Using a pH-stat (Radiometer), the pH of each bottle is maintained constant at about 8.0 by the addition of 0.1 M NaOH. When recording NaOH consumption, hydrolysis rates are calculated.

After 45 hours at 37 ° C, esterase hydrolysis of the polymer was found to be 11-fold faster than in the sample with (NH₄)₂SO₄ without esterase. In the sample containing 0.9% NaCl polymer, no hydrolysis was observed (see attached Fig. 1).

FIG. 1

Consumption of 0.1 M NaOH in 20 ml of 0.9% NaCl solution containing:

(a) Polymer and esterase with 0.1 ml of 3.2 M (NH₄)₂SO₄

b) 0.1 mL of 3.2 M (NH₄)₂SO₄

c) polymer only table

Consumption of 0.1 M NaOH in a flask containing polymer and esterase with 0.1 mL of 3.2 M (NH₄)₂SO₄ In a solution of 0.9% NaCl:

<td>Time (min)</td><td>PH</td><td>Volume of 0.1 M NaOH added (ml)</td>

<td> 0</td><td> 8.00</td><td> 0.000</td>

<td> 100</td><td> 8.00</td><td> 0.080</td>

<td> 220</td><td> 8.00</td><td> 0.142</td>

<td> 355</td><td> 8.00</td><td> 0.239</td>

<td> 2670</td><td> 8.00</td><td>to.ioi</td>

<td> 2710</td><td> 8.00</td><td> 1.105</td>

table

Consumption of 0.1 M NaOH in a flask containing 0.1 mL of 3.2 M (NH₄)₂SO₄ In 20 ml of 0.9% NaCl solution:

<td>Time (min)</td><td>pH</td><td>Volume of 0.1 M NaOH added (ml)</td>

<td> 0</td><td> 8.00</td><td> 0.000</td>

<td> 120</td><td> 8.00</td><td> 0.012</td>

<td> 240</td><td> 8.00</td><td> 0.030</td>

<td> 4316</td><td> 8.00</td><td> 0.130</td>

table

Consumption of 0.1 M NaOH in a polymer flask

In 20 ml of 0.9% NaCl solution:

<td>Time (min)</td><td>PH</td><td>Volume of 0.1 M NaOH added (ml)</td>

<td> 0</td><td> 8.40</td><td> 0.000</td>

<td> 115</td><td> 8.00</td><td> 0.002</td>

<td> 250</td><td> 8.00</td><td> 0.002</td>

<td> 300</td><td> 8.00</td><td> 0.002</td>

<td> 1600</td><td> 8.00</td><td> 0.002</td>

LITERATURE:

<td>1.Folkmann</td><td>M., Lund FJ</td><td>, Synthesis</td><td> 1990,</td><td> 1159</td><td></td>

<td>2.Stroholm</td><td>J., Kopecek</td><td>J., Angew.</td><td colspan="2">Macromol.</td><td>Chemie</td>

<td> 70, 1978,</td><td> 109</td><td></td><td></td><td></td><td></td>

<td>3.Benneche Scand. 43</td><td>T., Strande 1998, 74</td><td>P., Wiggen</td><td>u.,</td><td>Act</td><td>Chem.</td>