乙酸酐 、
methyl (1S,2R,3S,4R,5R)-5-O-tert-butyldimethylsilyl-3,4-O-cyclohexylidene-1,2,3,4,5-pentahydroxycyclohexanecarboxylate 在
吡啶 作用下,
反应 3.0h,
以85%的产率得到methyl (1S,2R,3S,4R,5R)-2-O-acetyl-5-O-tert-butyldimethylsilyl-3,4-O-cyclohexylidene-1,2,3,4,5-pentahydroxycyclohexanecarboxylate