2-O-Acetyl-3,4,6,7-tetra-O-benzyl-L-glycero-α-D-manno-heptopyranosylchlorid 、
methyl 2,4,6-tri-O-benzyl-L-glycero-α-D-manno-heptopyranoside 在
molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以71%的产率得到methyl O-(2-O-acetyl-3,4,6,7-tetra-O-benzyl-L-glycero-D-manno-heptopyranosyl)-(1->3)-O-<2-O-acetyl-3,4,6,7-O-L-glycero-D-manno-heptopyranosyl(1->7)>-2,3,6-tri-O-benzyl-L-glycero-α-D-manno-heptopyranoside