[(2R)-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]-6-methylheptan-3-yl] 2-(azidomethyl)benzoate 、
2-O-(4-methoxybenzoyl)-3,4-di-O-triethylsilyl-β-D-xylopyranosyl-(1→3)-2-O-acetyl-4-O-triethylsilyl-α,β-L-arabinopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以61%的产率得到[(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