2-azido-3,6-di-O-benzyl-2-deoxy-4-O-p-methoxybenzyl-β-D-glucopyranosyl-(1→4)-6-O-benzyl-3-O-benzyloxycarbonyl-2-N-trichloroethoxycarbonylamino-2-deoxy-D-glucopyranosyl N-phenyltrifluoroacetimidate 、 allyl 2-azido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranosyl-(1→4)-6-O-benzyl-3-O-benzyloxycarbonyl-2-N-trichloroethoxycarbonylamino-2-deoxy-α-D-glucopyranoside 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以80%的产率得到allyl 2-azido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranosyl-(1→4)-6-O-benzyl-3-O-benzyloxycarbonyl-2-N-trichloroethoxycarbonylamino-2-deoxy-β-D-glucopyranosyl-(1→4)-2-azido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranosyl-(1→4)-6-O-benzyl-3-O-benzyloxycarbonyl-2-N-trichloroethoxycarbonylamino-2-deoxy-α-D-glucopyranoside