1-((3R,4R,5R,8S,9S,10R,13S,14S,17S)-3-Bromo-10,13-dimethyl-hexadecahydro-20-oxa-cyclopropa[4,5]cyclopenta[a]phenanthren-17-yl)-ethanone 在
copper(l) iodide 、
锌 作用下,
以
乙醇 为溶剂,
以89%的产率得到1-((5S,8S,9S,10R,13S,14S,17S)-5-Hydroxy-10,13-dimethyl-2,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-ethanone