6-O-Acetyl-2-O-benzoyl-3,4-di-O-benzyl-alpha,beta-L-idopyranosyl trichloroacetimidate 、 [(2R,3R,4R,5S,6R)-5-[(2S,3R,4S,5R,6S)-6-(acetyloxymethyl)-5-[(2R,3R,4R,5S,6R)-5-[(2S,3R,4S,5R,6S)-6-(acetyloxymethyl)-5-[(2R,3R,4R,5S,6R)-3-azido-4-[(4-bromophenyl)methoxy]-6-[[tert-butyl(diphenyl)silyl]oxymethyl]-5-hydroxyoxan-2-yl]oxy-3-benzoyloxy-4-phenylmethoxyoxan-2-yl]oxy-3-azido-4-[(4-bromophenyl)methoxy]-6-[[tert-butyl(diphenyl)silyl]oxymethyl]oxan-2-yl]oxy-3-benzoyloxy-4-phenylmethoxyoxan-2-yl]oxy-2-[(2S,3R,4S,5R,6S)-2-(acetyloxymethyl)-6-[(2R,3S,4R,5R,6S)-5-azido-2-[[tert-butyl(diphenyl)silyl]oxymethyl]-6-methoxy-4-phenylmethoxyoxan-3-yl]oxy-5-benzoyloxy-4-phenylmethoxyoxan-3-yl]oxy-3-azido-6-[[tert-butyl(diphenyl)silyl]oxymethyl]oxan-4-yl] benzoate 在
三氟甲磺酸三甲基硅酯 、
sodium methylate 作用下,
以
二氯甲烷 、
甲醇 为溶剂,
反应 2.0h,
生成 (2S,3R,4R,5R,6S)-2-[(2R,3S,4R,5R,6R)-5-azido-6-[(2S,3R,4R,5R,6S)-6-[(2R,3S,4R,5R,6R)-5-azido-6-[(2S,3R,4R,5R,6S)-6-[(2R,3S,4R,5R,6R)-5-azido-6-[(2S,3R,4R,5R,6S)-6-[(2R,3S,4R,5R,6S)-5-azido-2-[[tert-butyl(diphenyl)silyl]oxymethyl]-6-methoxy-4-phenylmethoxyoxan-3-yl]oxy-5-hydroxy-2-(hydroxymethyl)-4-phenylmethoxyoxan-3-yl]oxy-2-[[tert-butyl(diphenyl)silyl]oxymethyl]-4-hydroxyoxan-3-yl]oxy-5-hydroxy-2-(hydroxymethyl)-4-phenylmethoxyoxan-3-yl]oxy-4-[(4-bromophenyl)methoxy]-2-[[tert-butyl(diphenyl)silyl]oxymethyl]oxan-3-yl]oxy-5-hydroxy-2-(hydroxymethyl)-4-phenylmethoxyoxan-3-yl]oxy-4-[(4-bromophenyl)methoxy]-2-[[tert-butyl(diphenyl)silyl]oxymethyl]oxan-3-yl]oxy-6-(hydroxymethyl)-4,5-bis(phenylmethoxy)oxan-3-ol