thexyldimethylsilyl β-D-galactopyranosyl-(1->4)-2-azido-2-deoxy-β-D-glucopyranoside 在
吡啶 、
三氟甲磺酸三甲基硅酯 、 Sikkon 、 camphor-10-sulfonic acid 作用下,
以
二氯甲烷 为溶剂,
反应 7.0h,
生成 thexyldimethylsilyl 3,4-di-O-acetyl-2-O-benzyl-α-L-fucopyranosyl-6-O-acetyl-3,4-O-isopropylidene-β-D-galactopyranosyl-(1->4)-[3,4-di-O-acetyl-2-O-benzyl-α-L-fucopyranosyl-(1->3)]-6-O-acetyl-2-azido-2-deoxy-β-D-glucopyranoside