5-azidopentyl (2,6-di-O-benzyl-3-O-p-methoxybenzyl-β-D-galactopyranosyl)-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside 、
3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 、 3 A molecular sieve 作用下,
以
二氯甲烷 、
甲苯 为溶剂,
反应 2.5h,
以64%的产率得到5-azidopentyl (3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl)-(1->4)]-(2,6-di-O-benzyl-3-O-p-methoxybenzyl-β-D-galactopyranosyl)-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside