[2-(2-{2-[2-(tert-Butyl-diphenyl-silanyloxy)-ethoxy]-ethoxy}-ethoxy)-ethoxy]-acetic acid (3S,5S,8R,9S,10S,13S,14S,17R)-17-((S)-2-acetoxy-1-methyl-ethyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester 在
吡啶 、
氢氟酸 作用下,
反应 1.5h,
以82%的产率得到[(3S,5S,8R,9S,10S,13S,14S,17R)-17-[(2S)-1-acetyloxypropan-2-yl]-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl] 2-[2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethoxy]acetate