2-O-Acetyl-3,4,6,7-tetra-O-benzyl-L-glycero-α-D-manno-heptopyranosylchlorid 、
methyl 2,4,6-tri-O-benzyl-3-O-(2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl)-L-glycero-α-D-manno-heptopyranoside 在
molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以89%的产率得到methyl O-(2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl)-(1->3)-O-<2-O-acetyl-3,4,6,7-tetra-O-benzyl-α-L-glycero-D-manno-heptopyranosyl-(1->7)>-2,4,6-tri-O-benzyl-l-glycero-α-D-manno-heptopyranoside