(allyl 2,3,4-tri-O-benzyl-β-D-glucopyranosyluronate)-(1->4)-1,6-anhydro-2-azido-3-O-benzyl-2-deoxy-β-D-glucopyranose   、                                                                                      
乙酸酐                                                                                                                                                              在
                                                                                                                                                                                 
溶剂黄146   、                                                                                                  
三氟乙酸                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (allyl 2,3,4-tri-O-benzyl-β-D-glucopyranosyluronate)-(1->4)-1,6-di-O-acetyl-2-azido-3-O-benzyl-2-deoxy-β-D-glucopyranose   、                                                                                             (allyl 2,3,4-tri-O-benzyl-β-D-glucopyranosyluronate)-(1->4)-1,6-di-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranose