O-(6-O-acetyl-2-azide-3,4-di-O-benzyl-2-deoxy-2-α-D-glucopyranosyl)-(1→4)-O-(methyl 2,3-di-O-benzyl-β-D-glucopyranosyluronate)-(1→4)-3,6-di-O-acetyl-2-azido-2-deoxy-α-D-glucopyranosyl trichloroacetimidate 、 在
三乙基硅基三氟甲磺酸酯 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以55.5%的产率得到methyl (2S,3S,4S,5R,6R)-6-[(2R,3S,4R,5R,6R)-4-acetyloxy-2-(acetyloxymethyl)-6-[(2R,3S,4S,5R,6R)-6-[(2R,3S,4R,5R,6S)-2-(acetyloxymethyl)-6-methoxy-4-phenylmethoxy-5-(phenylmethoxycarbonylamino)oxan-3-yl]oxy-5-benzoyloxy-2-methoxycarbonyl-4-phenylmethoxyoxan-3-yl]oxy-5-azidooxan-3-yl]oxy-3-[(2R,3R,4R,5S,6R)-6-(acetyloxymethyl)-3-azido-4,5-bis(phenylmethoxy)oxan-2-yl]oxy-4,5-bis(phenylmethoxy)oxane-2-carboxylate