乙酸酐 、
6,7-dideoxy-2-O-phenoxycarbonyl-5-O-[3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroacetamido)-β-D-glucopyranosyl]-L-galacto-hept-6-enono-1,4-lactone 在
吡啶 作用下,
以75%的产率得到3-O-acetyl-6,7-dideoxy-2-O-phenoxycarbonyl-5-O-[3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroacetamido)-β-D-glucopyranosyl]-L-galacto-hept-6-enono-1,4-lactone