[(3S,8S,9S,10R,13S,14S,17S)-17-acetyl-10,13-dimethyl-2,3,6,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl] (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)propanoate 在
哌啶 作用下,
以
乙腈 为溶剂,
反应 0.5h,
以73%的产率得到[(3S,8S,9S,10R,13S,14S,17S)-17-acetyl-10,13-dimethyl-2,3,6,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl] (2S)-2-aminopropanoate