isopropyl 2-azido-6-O-benzoyl-3-O-benzyl-2-deoxy-α-D-glucopyranoside 、
O-[methyl 4-O-(2-azido-3-O-benzyl-4,6-O-benzylidene-2-deoxy-α-D-glucopyranosyl)-3-O-benzyl-2-O-pivaloyl-L-idopyranosyluronate] trichloroacetamidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以90%的产率得到isopropyl O-(2-azido-3-O-benzyl-4,6-O-benzylidene-2-deoxy-α-D-glucopyranosyl)-(1→4)-O-(methyl-3-O-benzyl-2-O-pivaloyl-α-L-idopyranosyluronate)-(1→4)-2-azido-6-O-benzoyl-3-O-benzyl-2-deoxy-α-D-glucopyranoside