Steroids 1, 2, 3 containing both hydroxy and ethynyl groups at C(17) are selectively transformed by reaction with carboxylic acids, catalysed by [Ru(µ-O2CH)(CO)2(PPh3)]2 complex, into β-oxopropyl esters 4, 5, 6 with retention of configuration.
在[Ru(µ-O2CH)(CO)2(PPh3)]2 复合物的催化下,C(17)位同时含有羟基和
乙炔基的类
固醇 1、2、3 与
羧酸反应,选择性地转化为保留构型的 β-氧代丙基酯 4、5、6。