(6S,13S,17S)-6-hydroxy-2-methoxy-13-methyl-3-(trifluoromethylsulfonyloxy)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate 、
氯甲基甲基醚 在
N,N-二异丙基乙胺 作用下,
以
甲苯 为溶剂,
以96%的产率得到(6S,13S,17S)-2-methoxy-6-(methoxymethoxy)-13-methyl-3-(trifluoromethylsulfonyloxy)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate