申请人:Bentley Michael David
公开号:US20110077362A1
公开(公告)日:2011-03-31
The present invention is directed to branched reactive water-soluble polymers comprising at least two polymer arms, such as poly(ethylene glycol), attached to a central aliphatic hydrocarbon core molecule through ether linkages. The branched polymers bear at least one functional group for reacting with a biologically active agent to form a biologically active conjugate. The functional group of the branched polymer can be directly attached to the aliphatic hydrocarbon core or via an intervening linkage, such as a heteroatom, -alkylene-, —O-alkylene-O—, -alkylene-O-alkylene-, -aryl-O—, —O-aryl-, (—O-alkylene-)
m
, or (-alkylene-O—)
m
linkage, wherein m is 1-10.
本发明涉及分支反应性水溶性聚合物,包括至少两个聚合物臂,如聚乙二醇,通过醚键连接到中央脂肪族碳氢核心分子上。这些分支聚合物带有至少一个功能基团,用于与生物活性剂反应形成生物活性共轭物。分支聚合物的功能基团可以直接连接到脂肪族碳氢核心上,也可以通过介入连接,如杂原子,-烷基-,—O-烷基-O—,-烷基-O-烷基-, -芳基-O—,—O-芳基-,(—O-烷基-)m,或(-烷基-O—)m连接,其中m为1-10。