Biodegradable, anionic polymers derived from the amino acid...

C - Chemistry – Metallurgy – 08 – G

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C08G 64/42 (2006.01) A61L 27/18 (2006.01) C08G 64/18 (2006.01)

Patent

CA 2484177

A polymer with a hydrolytically labile backbone and having structure (VIII) wherein R9 is an alkyl, aryl or alkylaryl group with up to 18 carbon atoms having a pendent carboxylic acid group or the benzyl ester thereof; R12 is an alkyl, aryl or alkylaryl group with up to 18 carbon atoms having a pendent carboxylic acid ester group selected from straight and branched alkyl and alkylaryl esters containing up to 18 carbon atoms and ester derivatives of biologically and pharmaceutically active compounds covalently bonded thereto, provided that the ester group is not a benzyl group or a group that is removed by hydrogenolysis; each R7 is independently an alkylene group containing up to four carbon atoms; A is selected from: (a) and (b) wherein R8 is selected from saturated and unsaturated, substituted and unsubstituted alkyl, aryl and alkylaryl groups containing up to 18 carbon atoms; k is between about 5 and about 3,000; and x and f independently range from zero to less than one.

L'invention concerne un polymère ayant une structure d'éthavérine de base hydrolytiquement labile (VIII), dans laquelle R9 est un alkyle, un aryle ou un groupe alkylarylique contenant jusqu'à 18 atomes de carbone ayant un groupe d'acide carboxylique pendant ou l'esther de benzyl de ce dernier; R12 est un alkyle, un aryle ou un groupe alkylarylique contenant jusqu'à 18 atomes de carbone ayant un groupe d'esther carboxylique pendant choisi parmi des esthers d'alkyle et d'alkylaryl droits et ramifiés contenant jusqu'à 18 atomes de carbone et des dérivés d'esther de composés actifs biologiquement et pharmaceutiquement reliés de manière covalent au groupe d'esther, à condition que celui-ci ne soit pas un groupe de benzyl ou un groupe qui est retiré par hydrogénolyse; chaque R7 est indépendamment un groupe d'alkylène contenant jusqu'à quatre atomes de carbone; A est choisi parmi : (a) et (b), où R8 est choisi parmi des groupes d'alkyle, d'aryle et d'alkylaryle substitués et non substitués, saturés et insaturés contenant jusqu'à 18 atomes de carbone; k se situe entre environ 5 et 3 000; x et f varient indépendemment de 0 à moins de 1.

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