Acetic acid (8R,9S,10R,13S,14S,17S)-17-tert-butoxy-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-2-yl ester 在
lithium aluminium tetrahydride 作用下,
以
乙醚 为溶剂,
反应 0.5h,
以100%的产率得到(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-17-[(2-methylpropan-2-yl)oxy]-2,3,6,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-2,3-diol