Diazo-acetic acid (S)-4-((3S,8S,9S,10R,13R,14S,17R)-3-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-pentyl ester 以
甲醇 为溶剂,
反应 0.1h,
以9%的产率得到(3S,8S,9S,10R,13R,14S,17R)-17-((S)-4-Hydroxy-1-methyl-butyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol