methyl O-(2,4,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1<*>3)-2,4,6-tri-O-benzoyl-β-D-galactopyranoside 、
O-(2,4,6-tri-O-benzoyl-3-O-benzyl-β-D-galactopyranosyl)-(1<*>3)-2,4,6-tri-O-benzoyl-α-D-galactopyranosyl chloride 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55%的产率得到methyl O-(2,4,6-tri-O-benzoyl-3-O-benzyl-β-D-galactopyranosyl)-(1<*>3)-O-(2,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1<*>3)-O-(2,4,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1<*>3)-2,4,6-tri-O-benzoyl-β-D-galactopyranoside