N-benzyl-N-benzyloxycarbonyl-5-aminopentyl O-[2-azido-6-O-benzyl-2-deoxy-4-O-(9-fluorenylmethyloxycarbonyl)-α-D-glucopyranosyl]-(1→4)-O-(2-azido-3,6-di-O-benzyl-2-deoxy-β-D-mannopyranosyl)-(1→4)-6-O-benzyl-2-deoxy-3-O-levulinoyl-2-(2,2,2-trichloroethoxy)carbonylamino-β-D-glucopyranoside 、 在
三氟甲磺酸三甲基硅酯 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
反应 1.5h,
以82%的产率得到N-benzyl-N-benzyloxycarbonyl-5-aminopentyl O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl)-(1→3)-O-[2-azido-6-O-benzyl-2-deoxy-4-O-(9-fluorenylmethyloxycarbonyl)-α-D-glucopyranosyl]-(1→4)-O-(2-azido-3,6-di-O-benzyl-2-deoxy-β-D-mannopyranosyl)-(1→4)-6-O-benzyl-2-deoxy-3-O-levulinoyl-2-(2,2,2-trichloroethoxy)carbonylamino-β-D-glucopyranoside