(2S)-2-[(3S,8R,9S,10R,13S,14S,16R,17S)-3-[tert-butyl(diphenyl)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]-N-methoxy-N-methylpropanamide 在
碘 、
二异丁基氢化铝 作用下,
以
四氢呋喃 、
甲苯 为溶剂,
反应 3.5h,
生成 (3S,8R,9S,10R,13S,14S,16R,17S)-3-(tert-Butyl-diphenyl-silanyloxy)-17-((S)-1-[1,3]dithian-2-yl-ethyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-16,17-diol