3,4,6-tri-O-benzyl-2-O-acetyl-α-D-glucosyl trichloroimidate 、
5,7-bis(benzyloxy)-3-(3,4,6-tri-O-benzyl-β-D-glucopyranosyl)-2-[3,4-bis(benzyloxy)phenyl]-5-hydroxy-4H-1-benzopyran-4-one 在
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以87%的产率得到5,7-bis(benzyloxy)-3-[2-O-acetyl-3,4,6-tri-O-benzyl-β-D-glucopyranosyl-(1->2)-3,4,6-tri-O-benzyl-β-D-glucopyranosyl]-2-[3,4-bis(benzyloxy)phenyl]-5-hydroxy-4H-1-benzopyran-4-one