2-(benzyloxycarbonylamino)ethyl O-(methyl 2,3-di-O-benzoyl-β-D-glucopyranosyluronate)-(1->3)-4-O-benzoyl-6-O-chloroacetyl-2-deoxy-2-trichloroacetamido-β-D-galactopyranoside 、
O-(methyl-2,3-di-O-benzoyl-4-O-levulinoyl-β-D-glucopyranosyluronate)-(1->3)-4-O-benzoyl-6-O-chloroacetyl-2-deoxy-2-trichloroacetamido-1-O-trichloroacetimidoyl-α-D-galactopyranose 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 、
甲苯 为溶剂,
反应 2.5h,
以63%的产率得到2-(benzyloxycarbonylamino)ethyl O-(methyl 2,3-di-O-benzoyl-4-O-levulinoyl-β-D-glucopyranosyluronate)-(1->3)-(4-O-benzoyl-6-O-chloroacetyl-2-deoxy-2-trichloroacetamido-β-D-galactopyranosyl)-(1->4)-(methyl 2,3-di-O-benzoyl-β-D-glucopyranosyluronate)-(1->3)-4-O-benzoyl-6-O-chloroacetyl-2-deoxy-2-trichloroacetamido-β-D-galactopyranoside