2,3,4-Tri-O-(4-Chlorobenzyl)-6-Deoxy-L-Galactopyranoside 1-O-Trichloroacetimidate 、
6-O-benzoyl-3,4-O-isopropylidene-β-D-galactopyranosyl-(1->4)-2,3;4,6-di-O-isopropylidene-D-glucose dimethyl acetal 在
三氟甲磺酸三甲基硅酯 三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以86%的产率得到O-[2,3,4-tri-O-(4-chlorobenzyl)-6-deoxy-α-L-galactopyranosyl]-(1-2)-O-(6-O-benzoyl-3,4-O-isopropylidene-β-D-galactopyranosyl)-(1-4)-2,3:5,6-di-O-isopropylidene-D-gIucose dimethylacetal