sodium [(2,3-difluorobenzyl) 5-acetamido-9-(4-chlorobenzamido)-3,5,9-trideoxy-7,8-O-isopropylidene-D-glycero-α-D-galacto-2-nonulopyranosid]onate 、
苯甲酸酐 在
4-二甲氨基吡啶 作用下,
以
吡啶 为溶剂,
以61%的产率得到sodium [(2,3-difluorobenzyl) 5-acetamido-4-O-benzoyl-9-(4-chlorobenzamido)-3,5,9-trideoxy-7,8-O-isopropylidene-D-glycero-α-D-galacto-2-nonulopyranosid]onate