(2S,4aS,4bS,6aS,7S,10aS,10bR,12aS)-9a-Hydroxy-2-methoxy-4a,6a,7-trimethyl-octadecahydro-9-oxa-pentaleno[2,1-a]phenanthren-8-one 在
4,4-二碘联苯 、
碘 作用下,
以
环己烷 为溶剂,
反应 25.0h,
以39%的产率得到(3S,5S,8R,9S,10S,13S,14S)-17-Eth-(Z)-ylidene-3-methoxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-16-one