A method for producing a narrowly distributed and high-purity polyalkylene glycol derivative having an amino group at an end, a polymerization initiator for use in the method, and a precursor of the polymerization initiator are provided.
The present invention provides: a method for producing a polyalkylene glycol derivative having an amino group at an end, using, as a polymerization initiator, a compound represented by the general formula (I); a compound represented by the following general formula (I); and a precursor thereof:
wherein RA1a and RA1b each independently represent a protective group of the amino group, or one of RA1a and RA1b represents H and the other represents a protective group of the amino group, or RA1a and RA1b bind to each other to represent a cyclic protective group forming a ring; RA2 represents a linear, branched, or cyclic hydrocarbon group having 1 to 6 carbon atoms; RA3 represents a single bond, or a linear, branched, or cyclic hydrocarbon group having 1 to 20 carbon atoms, and the hydrocarbon group may contain a heteroatom; the total number of carbon atoms (or the total number of carbon atoms and heteroatoms) of RA2 and RA3 is 4 or more; and M represents an alkali metal.
本发明提供了一种生产末端具有
氨基的窄分布高纯度聚亚烷基二醇衍
生物的方法、一种用于该方法的聚合
引发剂以及一种聚合
引发剂的前体。
本发明提供了:一种生产末端具有
氨基的聚亚烷基二醇衍
生物的方法,该方法使用通式(I)所代表的化合物作为聚合
引发剂;一种由以下通式(I)所代表的化合物;以及其前体:
其中 RA1a 和 RA1b 各自独立地代表
氨基的保护基团,或 RA1a 和 RA1b 中的一个代表 H,另一个代表
氨基的保护基团,或 RA1a 和 RA1b 相互结合代表形成环的环状保护基团;RA2 代表具有 1 至 6 个碳原子的线性、支链或环状烃基;RA3 代表单键,或具有 1 至 20 个碳原子的线性、支链或环状烃基,且该烃基可能含有一个杂原子;RA2 和 RA3 的碳原子总数(或碳原子和杂原子总数)为 4 或更多;以及 M 代表碱
金属。