在
锂硼氢 作用下,
以
乙二醇二甲醚 为溶剂,
以58%的产率得到[(1R,3S,5S,8R,9S,10R,11R,13R,14S,17S)-17-[[tert-butyl(diphenyl)silyl]oxymethyl]-3-[dimethyl(phenyl)silyl]-5,11,14-trihydroxy-10-(hydroxymethyl)-13-methyl-2,3,4,6,7,8,9,11,12,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-1-yl] 4-methoxybenzoate