2,3,4,6-tetra-O-benzoyl-α-D-galactopyranosyl bromide 、
p-trifluroacetamidophenyl 2,3-O-isopropylidene-4-O-(2,3,4-tri-O-benzyl-β-D-mannopyranosyl)-α-L-rhamnopyranoside 在
2,4,6-三甲基吡啶 、
silver trifluoromethanesulfonate 作用下,
以
硝基甲烷 、
甲苯 为溶剂,
以84%的产率得到p-trifluoroacetamidophenyl O-(2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl)-(1->6)-O-(2,3,4-tri-O-benzyl-β-D-mannopyranosyl)-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside