methyl 3-formyl-3-phenylpropanoate 、 (3R,5R,8R,9R,10S,13S,14S,17S)-17-(aminomethyl)-3,13-dimethyl-2,4,5,6,7,8,9,10,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol 在
甲醇 、 sodium tetrahydroborate 作用下,
以
甲苯 为溶剂,
反应 4.0h,
以33%的产率得到1-[[(3R,5R,8R,9R,10S,13S,14S,17S)-3-hydroxy-3,13-dimethyl-2,4,5,6,7,8,9,10,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]methyl]-3-phenyl-2H-pyrrol-5-one