(-)-(4aS,4bR,8aS,10aS)-perhydrophenanthren-4-one 在
lithium aluminium tetrahydride 作用下,
以
吡啶 、
乙醚 为溶剂,
反应 6.0h,
生成 (3S,8S,9S,10R,13S,14S,17S)-3-Acetoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-17-carboxylic acid (4R,4aR,4bR,8aS,10aS)-(tetradecahydro-phenanthren-4-yl) ester