Benzoic acid (2R,3S,5R,6S)-2-((2S,3R,5S,6R)-6-acetoxymethyl-3,5-bis-benzyloxy-tetrahydro-pyran-2-yloxymethyl)-5-benzyloxy-6-methoxy-tetrahydro-pyran-3-yl ester 在
sodium methylate 作用下,
以
甲醇 、
甲苯 为溶剂,
反应 2.0h,
以79.4%的产率得到Benzoic acid (2R,3S,5R,6S)-5-benzyloxy-2-((2S,3R,5S,6R)-3,5-bis-benzyloxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxymethyl)-6-methoxy-tetrahydro-pyran-3-yl ester