2,3,5-tri-O-benzoyl-α-L-arabinofuranosyl 2,2,2-trichloroacetimidate 、
2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl-(1->3)-4,6-di-O-acetyl-1,2-O-ethylidene-α-D-galactopyranose 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以54%的产率得到2,3,5-tri-O-benzoyl-α-L-arabinofuranosyl-(1->6)-[2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl-(1->3)]-1,2-O-ethylidene-α-D-galactopyranose