、 、 (1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-tert-butyldimethylsilyl 9-(4-(methoxycarbonyl)phenyl)-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysene-3a-carboxylate 、 在
钯 作用下,
以afforded the title compound (54%)的产率得到(4aS,6aS,6bR,8aR,12aS,12bR,14bS)-tert-butyldimethylsilyl 10-(4-(methoxycarbonyl)phenyl)-2,2,6a,6b,9,9,12a-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7-octadecahydropicene-4a-carboxylate