[(2R)-2-[(3S,8R,9S,10R,13S,14S,16S,17S)-16-[(2S,3R,4R,5S)-3-acetyloxy-4-[(2S,3R,4R,5R)-3-(4-methoxybenzoyl)oxy-4,5-bis(triethylsilyloxy)oxan-2-yl]oxy-5-triethylsilyloxyoxan-2-yl]oxy-3-[tert-butyl(dimethyl)silyl]oxy-17-hydroxy-10,13-dimethyl-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-yl]-6-methylheptan-3-yl] 2-(azidomethyl)benzoate 在
三丁基膦 、
水 作用下,
以
四氢呋喃 为溶剂,
反应 0.5h,
以82%的产率得到[(2S,3R,4R,5R)-2-[(2S,3R,4R,5S)-3-acetyloxy-2-[[(3S,8R,9S,10R,13S,14S,16S,17S)-3-[tert-butyl(dimethyl)silyl]oxy-17-hydroxy-17-[(2R)-3-hydroxy-6-methylheptan-2-yl]-10,13-dimethyl-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-16-yl]oxy]-5-triethylsilyloxyoxan-4-yl]oxy-4,5-bis(triethylsilyloxy)oxan-3-yl] 4-methoxybenzoate