[3-(tert-butyl-dimethyl-silanoxy)-13-methyl-6,7,8,9,11,12,13,14,15,16-decahydrocyclopenta[a]phenanthren-17-ylidene]-acetic acid ethyl ester 在
5% Pd/CaCO3
氢气 作用下,
以
乙醇 为溶剂,
以77%的产率得到[3-(tert-butyl-dimethyl-silanoxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl]-acetic acid ethyl ester