2-(10,13-dimethyl-3-oxo-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-propionic acid 5-[2-(10,13-dimethyl-3-oxo-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-propionyloxymethyl]-2-phenyl-[1,3]dioxolan-4-ylmethyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
以100%的产率得到2-(10,13-dimethyl-3-oxo-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-propionic acid 4-[2-(10,13-dimethyl-3-oxo-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-propionyloxy]-2,3-dihydroxy-butyl ester