A compound of the formula
wherein R is H or C1-8 alkyl; X is -0-, -S-, -NH- or -N(C1-8 alkyl)-; and Y is the residue of an active hydrogen atom-containing compound (excluding -X-H therefrom).
Such compounds can be dissolved in an organic solvent having a solubility parameter of not less than 8. They can impart excellent physical properties to a polymer produced therefrom.
式中的化合物
其中 R 是 H 或 C1-8 烷基;X 是 -0-、-S-、-NH- 或 -N(C1-8烷基)-;Y 是含活性氢原子化合物的残余物(不包括其中的 -X-H)。
这些化合物可以溶解在溶解度不小于 8 的有机溶剂中。
Polymer Derivatives Comprising an Acetal or Ketal Branching Point
申请人:Nektar Therapeutics
公开号:US20140039167A1
公开(公告)日:2014-02-06
The invention conjugates that can be prepared by contacting a polymer comprising an acetal or ketal branching point with a pharmacologically active agent under conditions suitable to form a covalent attachment between the polymer and the pharmacologically active agent.