(22R,24ξ,28ξ)-22,28-oxido-24-methylcholest-5-en-3β,25,28-triol-3,28-diacetate 在
sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
反应 2.0h,
以80%的产率得到Acetic acid (3S,8S,9S,10R,13S,14S,17R)-17-{(S)-1-[(R)-5-hydroxy-4-(1-hydroxy-1-methyl-ethyl)-tetrahydro-furan-2-yl]-ethyl}-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester