methyl (2R,3S,4S,5R,6R)-3,5-diacetyloxy-4-methoxy-6-[(2R,3S,4R,5R,6S)-6-methoxy-5-(methoxysulfonylmethyl)-4-phenylmethoxy-2-(phenylmethoxymethyl)oxan-3-yl]oxyoxane-2-carboxylate 在
甲醇 、
sodium methylate 作用下,
反应 2.0h,
以97%的产率得到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