1-[(3S,5R,8R,10S,13S,14R,17R)-3-[tert-butyl(dimethyl)silyl]oxy-17-[[tert-butyl(dimethyl)silyl]oxymethyl]-10,13-dimethyl-14-triethylsilyloxy-1,2,3,4,5,6,7,8,12,15,16,17-dodecahydrocyclopenta[a]phenanthren-11-yl]ethanone 在
camphor-10-sulfonic acid 作用下,
以
甲醇 为溶剂,
反应 24.0h,
以61%的产率得到1-((3S,5R,8R,10S,13S,14R,17R)-3,14-dihydroxy-17-(hydroxymethyl)-10,13-dimethyl-2,3,4,5,6,7,8,10,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-11-yl)ethanone