methyl [(methyl 2-O-benzoyl-3-O-benzyl-α-L-iodopyranosyluronate)-(1-4)-2-azido-6-O-benzoyl-3-O-benzyl]-2-deoxy-α-D-glucopyranoside 、 6-O-acetyl-2-azido-2-deoxy-3,4-di-O-benzyl-α-D-glucopyranosyl-(1-4)-O-[benzyl-2,3-O-dibenzyl-β-D-glucopyranosyluronate]-(1-4)-O-2-azido-2-deoxy-3,6-di-O-acetyl-1-O-trichloroacetimidoyl-β-D-glucopyranose 在
三氟甲磺酸三甲基硅酯 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以71%的产率得到methyl O-6-O-acetyl-2-azido-2-deoxy-3,4-di-O-benzyl-α-D-glucopyranosyl-(1-4)-O-[benzyl-2,3-O-dibenzyl-β-D-glucopyranosyluronate]-(1-4)-O-2-azido-2-deoxy-3,6-di-O-acetyl-α-D-glucopyranosyl-(1-4)-O-[methyl 2-O-benzoyl-3-O-benzyl-α-L-idopyranosyluronate]-(1-4)-2-azido-6-O-benzoyl-3-O-benzyl-2-deoxy-α-D-glucopyranoside