16-((E)-4-chlorobenzylidene)-3-hydroxy-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[a]phenanthren-17-one 、
氰乙酸乙酯 在
乙酸铵 作用下,
以
乙醇 为溶剂,
反应 7.0h,
以76%的产率得到(2S,4aR,4bS,6aS,11aS,11bR)-10-(4-Chloro-phenyl)-2-hydroxy-4a,6a-dimethyl-8-oxo-2,3,4,4a,4b,5,6,6a,8,9,11,11a,11b,12-tetradecahydro-1H-9-aza-indeno[2,1-a]phenanthrene-7-carbonitrile