苄胺 、 acetic acid (3R,5R,8R,9S,10S,12S,13S,14S,17R)-3-acetoxy-10,13-dimethyl-17-((S)-1-methyl-2-oxoethyl)-hexadecahydrocyclopenta[a]phenanthren-12-yl ester 在
三乙酰氧基硼氢化钠 、
溶剂黄146 作用下,
以
二氯甲烷 为溶剂,
反应 9.5h,
以50%的产率得到[(3R,5R,8R,9S,10S,12S,13S,14S,17R)-12-acetyloxy-17-[(2S)-1-(benzylamino)propan-2-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