[(5S,7R,10S,13R,17R)-17-[(5S)-5-hydroxy-6-methylhept-3-en-2-yl]-10,13-dimethylspiro[1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-3,2'-1,3-dioxolane]-7-yl] benzoate 在
palladium 10% on activated carbon 、
氢气 、
4-甲基苯磺酸吡啶 、 sodium nitrite 作用下,
以
四氢呋喃 、
水 、
丙酮 为溶剂,
反应 28.0h,
生成 [(5S,7R,10S,13R,17R)-17-[(5R)-5-hydroxy-6-methylheptan-2-yl]-10,13-dimethyl-3-oxo-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-7-yl] benzoate