S-(3-chloro-1-((3R,5S,8R,9S,10S,13S,14S,17S)-3,17-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)-3,3-difluoropropyl) O-octadecyl carbonodithioate 在
偶氮二异丁腈 、
三(三甲基硅基)硅烷 作用下,
以
环己烷 、
甲苯 为溶剂,
以67%的产率得到(3R,5S,8R,9S,10S,13S,14S,17R)-17-(3-chloro-3,3-difluoropropyl)-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol