(E)-(S)-6-((3S,5R,8R,9R,10R,12R,13R,14R,17S)-3,12-Diacetoxy-4,4,8,10,14-pentamethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-6-((2S,3R,4S,5R,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-hept-2-enoic acid methyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
以98%的产率得到(S)-6-((3S,5R,8R,9R,10R,12R,13R,14R,17S)-3,12-Diacetoxy-4,4,8,10,14-pentamethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-6-((2S,3R,4S,5R,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-heptanoic acid methyl ester