AbstractThe system diethylzinc/optically active alcohol was examined as catalyst for asymmetric‐selective polymerization of propylene oxide. Optically active alcohols with rigid structure are effective for the asymmetric selection. D(–)‐1‐Methoxypropanol‐2 as well as poly(D‐propylene oxide) of low molecular weight with hydroxyl end groups select L(–)‐propylene oxide. „Catalyst control”︁ mechanism of the stereoselection in the polymerization is suggested on this and other bases.
摘要 研究了作为环氧丙烷不对称选择性聚合催化剂的二乙基锌/光学活性醇体系。具有刚性结构的光学活性醇对不对称选择非常有效。D(-)-1-甲氧基丙醇-2 以及带有羟基末端的低分子量聚(D-环氧丙烷)可选择 L(-)-环氧丙烷。在此基础上提出了聚合过程中立体选择的 "催化剂控制"︁ 机制。