2,3,4,6-tetra-O-benzyl-D-galactopyranosyl bromide 、
propyl O-(2-O-benzoyl-3,6-di-O-benzyl-β-D-galactopyranosyl)-(1-3)-2-acetamido-4,6-di-O-benzyl-2-deoxy-β-D-glucopyranoside 在
silver trifluoromethanesulfonate 、 silver carbonate 作用下,
以
二氯甲烷 为溶剂,
以72%的产率得到propyl O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl)-(1-4)-O-(2-O-benzoyl-3,6-di-O-benzyl-β-D-galactopyranosyl)-(1-3)-2-acetamido-4,6-di-O-benzyl-2-deoxy-β-D-glucopyranoside