methyl O-(2,3,4-tri-O-benzoyl-β-D-galactopyranosyl)-(1->6)-2,3,4-tri-O-benzoyl-β-D-galactopyranoside 、 O-(2,3,4-tri-O-benzoyl-6-O-chloroacetyl-β-D-galactopyranosyl)-(1->6)-2,3,4-tri-O-benzoyl-α-D-galactopyranosyl ckloride 在
2,4,6-三甲基吡啶 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
以89%的产率得到methyl O-(2,3,4-tri-O-benzoyl-6-O-chloroacetyl-β-D-galactopyranosyl)-(1->6)-O-(2,3,4-tri-O-benzoyl-β-D-galactopyranosyl)-(1->6)-O-(2,3,4-tri-O-benzoyl-β-D-galactopyranosyl)-(1->6)-2,3,4-tri-O-benzoyl-β-D-galactopyranoside