Benzoic acid (2R,3S,5R,6S)-2-[(2S,3R,4S,5R,6R)-6-((2S,3R,4S,5R,6R)-6-acetoxymethyl-3,4,5-tris-benzyloxy-tetrahydro-pyran-2-yloxymethyl)-3,4,5-tris-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 24.0h,
以90.4%的产率得到(2R,3S,5R,6S)-5-Benzyloxy-6-methoxy-2-[(2S,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-((2S,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxymethyl)-tetrahydro-pyran-2-yloxymethyl]-tetrahydro-pyran-3-ol