(4R,5R,8R,9S,10R,13S,14S)-5-Hydroxy-4-(4-methoxy-benzyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-one 在
吡啶 、
氯化亚砜 作用下,
反应 0.25h,
以99%的产率得到(4R,8R,9S,10R,13S,14S)-4-[(4-methoxyphenyl)methyl]-10,13-dimethyl-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-one