1α,3β,24(R)-triethoxycarbonyloxycholest-5-ene 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 (1S,3R,8S,9S,10R,13R,14S,17R)-7-bromo-1-ethoxycarbonyloxy-17-((1S,4R)-4-ethoxycarbonyloxy-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