S-(2-methylpropyl) (2S)-2-[(3S,8R,9S,10R,13S,14S,17S)-3-[tert-butyl(dimethyl)silyl]oxy-17-hydroxy-10,13-dimethyl-16-oxo-2,3,4,7,8,9,11,12,14,15-decahydro-1H-cyclopenta[a]phenanthren-17-yl]propanethioate 在
sodium tetrahydroborate 、 cerium(III) chloride 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以43%的产率得到S-(2-methylpropyl) (2S)-2-[(3S,8R,9S,10R,13S,14S,16S,17S)-3-[tert-butyl(dimethyl)silyl]oxy-16,17-dihydroxy-10,13-dimethyl-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-yl]propanethioate