乙酸酐 、
(2S,4S,5R,6R)-5-Acetylamino-4-benzoyloxy-2-((2R,3S,4R,5R,6R)-3,4,5-tris-benzoyloxy-6-methoxy-tetrahydro-pyran-2-ylmethoxy)-6-((1S,2R)-1,2,3-tris-benzoyloxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester 在
硫酸 溶剂黄146 作用下,
以
二氯甲烷 为溶剂,
反应 6.0h,
以85%的产率得到(2S,4S,5R,6R)-2-((2R,3S,4R,5R,6R)-6-Acetoxy-3,4,5-tris-benzoyloxy-tetrahydro-pyran-2-ylmethoxy)-5-acetylamino-4-benzoyloxy-6-((1S,2R)-1,2,3-tris-benzoyloxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester