(2R,3S,4S,5R)-4-methoxy-2-(methoxycarbonyl)-6-(2,2,2-trichloro-1-iminoethoxy)tetrahydro-2H-pyran-3,5-diyl diacetate 、
methyl [(2S,3R,4R,5S,6R)-5-hydroxy-2-methoxy-4-phenylmethoxy-6-(phenylmethoxymethyl)oxan-3-yl]methanesulfonate 在
三氟甲磺酸三甲基硅酯 、
甲醇 、
sodium methylate 作用下,
以
二氯甲烷 为溶剂,
反应 2.25h,
生成 methyl (2R,3S,4S,5R,6R)-6-(((2R,3S,4R,5R,6S)-4-(benzyloxy)-2-((benzyloxy)methyl)-6-methoxy-5-((methoxysulfonyl)methyl)tetrahydro-2H-pyran-3-yl)oxy)-3,5-dihydroxy-4-methoxytetrahydro-2H-pyran-2-carboxylate