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    • 4. 发明授权
    • High molecular weight polymer-based prodrugs
    • 高分子量聚合物基前药
    • US5965566A
    • 1999-10-12
    • US914927
    • 1997-08-20
    • Richard B. GreenwaldAnnapurna PendriHong Zhao
    • Richard B. GreenwaldAnnapurna PendriHong Zhao
    • A61K31/335A61K47/48C07D305/14C07D491/22C08G65/329A61K31/44
    • A61K47/48215A61K31/335C07D305/14C08G65/329
    • The present invention is directed compositions of the formula: ##STR1## wherein: D is a residue of biologically active moiety;X is an electron withdrawing group;Y and Y' are independently O or S;(n) is zero (0) or a positive integer, preferably from 1 to about 12;wherein: R.sub.1 and R.sub.2 are independently selected from the group consisting of H, C.sub.1-6 alkyls, aryls, substituted aryls, aralkyls, heteroalkyls, substituted heteroalkyls and substituted C.sub.1-6 alkyls;wherein: R.sub.3 is a substantially non-antigenic polymer, C.sub.1-12 straight or branched alkyl or substituted allyl, C.sub.5-8 cycloalkyl or substituted cycloalkyl, carboxyalkyl, carboalkoxy alkyl, dialkylaminoalkyl, phenylalkyl, phenylaryl or ##STR2## wherein: R.sub.4 and R.sub.5 are independently selected from the group consisting of H, C.sub.1-6 alkyls, aryls, substituted aryls, aralkyls, heteroalkyls, substituted heteroalkyls, and substituted C.sub.1-6 alkyls or jointly form a cyclic C.sub.5 -C.sub.7 ring. In preferred embodiments, the prodrugs contain a polyethylene glycol having a molecular weight of at least about 20,000.
    • 本发明涉及下式的组合物:其中:D是生物活性部分的残基; X是吸电子基团; Y和Y'独立地为O或S; (n)为零(0)或正整数,优选1至约12; 其中:R 1和R 2独立地选自H,C 1-6烷基,芳基,取代的芳基,芳烷基,杂烷基,取代的杂烷基和取代的C 1-6烷基; 其中:R3是基本上非抗原性的聚合物,C1-12直链或支链烷基或取代的烯丙基,C5-8环烷基或取代的环烷基,羧基烷基,烷氧基烷基,二烷基氨基烷基,苯基烷基,苯基芳基或其中:R4和R5独立地选自 由H,C 1-6烷基,芳基,取代的芳基,芳烷基,杂烷基,取代的杂烷基和取代的C 1-6烷基组成的基团或共同形成环状C 5 -C 7环。 在优选的实施方案中,前药包含分子量为至少约20,000的聚乙二醇。