(1S,2S,4R,4aS,10aR)-2,4-bis[[tert-butyl(dimethyl)silyl]oxy]-1,4a-dimethyl-9-oxo-3,4,5,6,7,8,10,10a-octahydro-2H-phenanthrene-1-carboxylic acid 在
盐酸 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 9.0h,
以87%的产率得到(1S,2S,4R,4aS,10aR)-2,4-dihydroxy-1,4a-dimethyl-9-oxo-3,4,5,6,7,8,10,10a-octahydro-2H-phenanthrene-1-carboxylic acid