2-O-acetyl-4-azido-3-O-benzyl-4,6-dideoxy-D-glucopyranosyl trichloroacetimidate 、
2-[(N,N'-benzyl-benzyloxycarbonyl)amino]ethyl 2,4-di-O-benzyl-α-L-rhamnopyranosyl-(1->3)-2,4-di-O-benzyl-α-L-rhamnopyranosyl-(1->2)-3,4-di-O-benzyl-α-L-rhamnopyranoside 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以56%的产率得到2-[(N,N'-benzyl-benzyloxycarbonyl)amino]ethyl 2-O-acetyl-4-azido-3-O-benzyl-4,6-dideoxy-β-D-glucopyranosyl-(1->3)-2,4-di-O-benzyl-α-L-rhamnopyranosyl-(1->3)-2,4-di-O-benzyl-α-L-rhamnopyranosyl-(1->2)-3,4-di-O-benzyl-α-L-rhamnopyranoside