(methyl 2,3-di-O-benzyl-β-D-glucopyranosyluronate)-O-(1→4)-1,6-anhydro-2-azido-3-O-benzyl-2-deoxy-β-D-glucopyranose   、                                                                                      
(allyl 2,3,4-tri-O-benzyl-β-D-glucopyranosyluronate)-(1->4)-6-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl trichloroacetimidate                                                                                                                                                              在
                                                                                                                                                                                 
叔丁基二甲硅基三氟甲磺酸酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 7.5h,
                                                                                                                以43%的产率得到(allyl 2,3,4-tri-O-benzyl-β-D-glucopyranosyluronate)-(1->4)-(6-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1->4)-(methyl 2,3-di-O-benzyl-β-D-glucopyranosyluronate)-(1->4)-1,6-anhydro-2-azido-3-O-benzyl-2-deoxy-β-D-glucopyranose