乙酸酐 、 (2R,3S,4S,5R,6R)-5-Acetoxy-6-((2R,3R,4S,5R,6S)-5-benzyloxy-2-benzyloxymethyl-4,6-dimethoxy-tetrahydro-pyran-3-yloxy)-3,4-dimethoxy-tetrahydro-pyran-2-carboxylic acid benzyl ester 在
硫酸 作用下,
反应 0.25h,
生成
(2R,3S,4S,5R,6R)-5-Acetoxy-6-((2R,3R,4S,5R)-6-acetoxy-2-acetoxymethyl-5-benzyloxy-4-methoxy-tetrahydro-pyran-3-yloxy)-3,4-dimethoxy-tetrahydro-pyran-2-carboxylic acid benzyl ester