methyl (isopropyl 4-O-(6-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-3-O-benzyl-2-O-pivaloyl-α-L-idopyranosyl)uronate 、 O-(methyl 4-O-(2-acetamido-3-O-benzyl-4,6-O-benzylidene-2-deoxy-α-D-glucopyranosyl)-2-O-acetyl-3-O-benzyl-α,β-L-idopyranosyluronate) trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 7.5h,
以33%的产率得到methyl (isopropyl O-(2-acetamido-3-O-benzyl-4,6-O-benzylidene-2-deoxy-α-D-Glc)-(1->4)-O-(methyl 2-O-Ac-3-O-benzyl-α-L-idopyranosyluronate)-(1->4)-O-(6-O-Ac-2-azido-3-O-benzyl-2-deoxy-α-D-Glc)-(1->4)-3-O-benzyl-2-O-pivaloyl-α-L-idopyranosyl)uronate