allyl (methyl 2,3-di-O-benzoyl-β-D-glucopyranosyluronate)-(1->3)-4,6-O-p-methoxybenzylidene-2-deoxy-2-trichloroacetamido-β-D-galactopyranoside 、
methyl (2,3-di-O-benzoyl-4-O-tert-butyldimethylsilyl-β-D-glucopyranosyluronate)-(1->3)-4,6-O-p-methoxybenzylidene-2-deoxy-2-trichloroacetamido-α-D-galactopyranoside trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以31%的产率得到allyl (methyl 2,3-di-O-benzoyl-4-O-tert-butyldimethylsilyl-β-D-glucopyranosyluronate)-(1->3)-(4,6-O-p-methoxybenzylidene-2-deoxy-2-trichloroacetamido-β-D-galactopyranosyl)-(1->4)-(methyl 2,3-di-O-benzoyl-β-D-glucopyranosyluronate)-(1->3)-4,6-O-p-methoxybenzylidene-2-deoxy-2-trichloroacetamido-β-D-galactopyranoside