3-O-tert-butyldimethylsilyl-2-deoxy-4,6-O-isopropylidene-2-trichloroacetamido-α,β-D-glucopyranosyl trichloroacetimidate 、
allyl (4-O-benzyl-3-O-para-methoxybenzyl-α-L-rhamnopyranosyl)-(1->2)-(3,4-di-O-benzyl-α-L-rhamnopyranosyl)-(1->3)-[2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl-(1->4)]-2-O-acetyl-α-L-rhamnopyranoside 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 、
1,2-二氯乙烷 为溶剂,
反应 3.5h,
以75%的产率得到allyl (3-O-tert-butyldimethylsilyl-2-deoxy-4,6-O-isopropylidene-2-trichloroacetamido-β-D-glucopyranosyl)-(1->2)-(4-O-benzyl-3-O-para-methoxybenzyl-α-L-rhamnopyranosyl)-(1->2)-(3,4-di-O-benzyl-α-L-rhamnopyranosyl)-(1->3)-[2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl-(1->4)]-2-O-acetyl-α-L-rhamnopyranoside