Methyl 2-benzyloxycarbonylamino-3-O-benzoyl-2-deoxy-6-O-(2-naphthylmethyl)-alpha-D-glucopyranoside 、 6-O-Acetyl-4-O-[2-azido-3-O-(4-bromobenzyl)-6-O-tert-butyldiphenylsilyl-2-deoxy-4-O-levulinyl-alpha-D-glucopyranosyl]-2-O-benzoyl-3-O-benzyl-alpha,beta-L-idopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以70%的产率得到Methyl [2-azido-3-O-(4-bromobenzyl)-6-O-tert-butyldiphenylsilyl-2-deoxy-4-O-levulinyl-alpha-D-glucopyranosyl]-(1-4)-(6-O-acetyl-2-O-benzoyl-3-O-benzyl-alpha-L-idopyranosyl)-(1-4)-2-benzyloxycarbonylamino-3-O-benzoyl-2-deoxy-6-O-(2-naphthylmethyl)-alpha-D-glucopyranoside