[4S-(4β,5β,9α,10β,13β,17β)]-4-(tert-butyldiphenylsilanyloxy)-17-hydroxy-13-methyl-1,7-dioxo-1,2,3,4,5,6,7,9,11,12,13,15,16,17-tetradecahydro-cyclopenta[a]phenanthrene-10-carboxylic acid methyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙醇 为溶剂,
20.0 ℃
、101.32 kPa
条件下,
反应 18.0h,
以76%的产率得到[4S-(4β,5β,9α,10β,13β,17β)]-4-(tert-butyldiphenylsilanyloxy)-17-hydroxy-13-methyl-1-oxo-1,2,3,4,5,6,7,9,11,12,13,15,16,17-tetradecahydro-cyclopenta[a]phenanthrene-10-carboxylic acid methyl ester