[(1R)-1-[(1S,4aR,6R,8aS)-6-[dimethyl(phenyl)silyl]-8a-[(4-methoxyphenyl)methoxymethyl]-3,8-dioxo-2,4,4a,5,6,7-hexahydro-1H-naphthalen-1-yl]-2-[(1R,2S)-2-[[tert-butyl(diphenyl)silyl]oxymethyl]-1-methyl-5-oxocyclopentyl]ethyl] acetate 在
双(三甲基硅烷基)氨基钾 、
溶剂黄146 作用下,
以
四氢呋喃 、
甲苯 为溶剂,
以83%的产率得到[(3R,5R,8R,9S,10S,11R,13R,14S,17S)-17-[[tert-butyl(diphenyl)silyl]oxymethyl]-3-[dimethyl(phenyl)silyl]-14-hydroxy-10-[(4-methoxyphenyl)methoxymethyl]-13-methyl-1,7-dioxo-2,3,4,5,6,8,9,11,12,15,16,17-dodecahydrocyclopenta[a]phenanthren-11-yl] acetate