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