[(3S,8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-[(2S)-6-methylheptan-2-yl]-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl] ethyl carbonate 在
1,3-二溴-5,5-二甲基海因 作用下,
以
正己烷 为溶剂,
反应 0.25h,
生成 Carbonic acid (3S,8S,9S,10R,13R,14S,17R)-7-bromo-17-((S)-1,5-dimethyl-hexyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester ethyl ester