O-(3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-(1*4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-1-β-D-glucopyranosyl azide 、
4,6-O-benzylidene-2-O-chloroacetyl-3-O-(N-phenylcarbamoyl)-D-glucopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以62.4%的产率得到O-(4,6-O-benzylidene-2-O-chloroacetyl-3-O-(N-phenylcarbamoyl)-β-D-glucopyranosyl)-(1->4)-O-(3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl azide