N-(benzyl)-benzyloxycarbonyl-5-aminopentyl O-(methyl 2-O-acetyl-3-O-benzyl-β-D-glucopyranosyluronate)-(1->4)-O-2-azido-3-O-benzyl-6-O-levulinoyl-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,
                                                                                                                                                                                        以64%的产率得到N-(benzyl)-benzyloxycarbonyl-5-aminopentyl O-[(methyl 2-O-acetyl-3-O-benzyl-4-O-(9-fluorenylmethoxycarbonyl)-α-L-idopyranosyluronate)-(1->4)-O-(2-azido-3-O-benzyl-2-deoxy-6-O-levulinoyl-α-D-glucopyranoside)-(1->4)-O-(methyl 2-O-acetyl-3-O-benzyl-β-D-glucopyranosyluronate)]-(1->4)-O-(2-azido-3-O-benzyl-2-deoxy-6-O-levulinoyl)-α-D-glucopyranoside