(1R,2S,4R,6R,7S,10S,11S,14S,16S)-14-methoxy-6-[(1S)-1-methoxyethyl]-7,11-dimethyl-5-oxapentacyclo[8.8.0.02,7.04,6.011,16]octadecane 、
甲基氯化镁 在
copper(I) bromide dimethylsulfide complex 作用下,
以
四氢呋喃 为溶剂,
反应 5.0h,
以91%的产率得到(3S,5S,8R,9S,10S,13S,14S,16S,17R)-3-methoxy-17-[(1S)-1-methoxyethyl]-10,13,16-trimethyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-17-ol