(3S,8R,9S,10R,13S,14S)-16-Bromo-3-(4-methoxy-benzyloxy)-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-cyclopenta[a]phenanthren-17-one 在
sodium hydroxide 作用下,
以
二氯甲烷 、
N,N-二甲基甲酰胺 为溶剂,
以97%的产率得到(3S,8R,9S,10R,13S,14S,16R)-16-Hydroxy-3-(4-methoxy-benzyloxy)-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-cyclopenta[a]phenanthren-17-one