[(3S,5S,8R,9S,10S,13S,14S,17S)-17-[(3R)-2-acetyl-3-phenyl-3,4-dihydropyrazol-5-yl]-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl] acetate 在
potassium hydroxide 作用下,
以
甲醇 为溶剂,
以85%的产率得到1-[(3R)-5-[(3S,5S,8R,9S,10S,13S,14S,17S)-3-hydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-3-phenyl-3,4-dihydropyrazol-2-yl]ethanone