8-methoxycarbonyloctyl 2,3,6-tri-O-acetyl-4-O-(2,3-di-O-acetyl-6-O-benzoyl-β-D-galactopyranosyl)-β-D-glucopyranoside 、
4,6-di-O-acetyl-3-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-2-deoxy-2-phthalimido-α,β-galactopyranosyl bromide 在
2,4,6-三甲基吡啶 、
silver trifluoromethanesulfonate 作用下,
以
硝基甲烷 为溶剂,
以62%的产率得到8-methoxycarbonyloctyl 2,3,6-tri-O-acetyl-4-O-<2,3-di-O-acetyl-6-O-benzoyl-4-O-<4,6-di-O-acetyl-3-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-2-deoxy-2-phthalimido-β-D-galactopyranosyl>-β-D-galactopyranosyl>-β-D-glucopyranoside