乙酸酐 、
(2S,3S,4S,5R,6R)-6-((2R,3R,4S,5S,6R)-2-Allyloxy-3-benzoyloxy-5-hydroxy-6-hydroxymethyl-tetrahydro-pyran-4-yloxy)-3,4,5-tris-(2,2-dimethyl-propionyloxy)-tetrahydro-pyran-2-carboxylic acid methyl ester 在
吡啶 作用下,
反应 70.0h,
以98%的产率得到methyl (2S,3S,4S,5R,6R)-6-[(2R,3S,4S,5R,6R)-3-acetyloxy-2-(acetyloxymethyl)-5-benzoyloxy-6-prop-2-enoxyoxan-4-yl]oxy-3,4,5-tris(2,2-dimethylpropanoyloxy)oxane-2-carboxylate