methyl 4-C-[(3S,4R)-4-acetoxy-3-(methoxycarbonyl)-pyrrolidin-1-yl]methyl-2-amino-6-O-tert-butyldimethylsilyl-2,4-dideoxy-α-D-glucopyranoside 、
乙酸酐 在
吡啶 作用下,
以90%的产率得到methyl 2-acetamido-4-C-[(3S,4R)-4-acetoxy-3-(methoxycarbonyl)pyrrolidin-1-yl]methyl-3-O-acetyl-6-O-tert-butyldimethylsilyl-2,4-dideoxy-α-D-glucopyranoside