2-(trifluoroacetylamino)ethyl (2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->2)-(4,6-O-benzylidene-β-D-galactopyranosyl)-(1->4)-2-acetylamino-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranoside   、                                                                                      3,4,6-tri-O-acetyl-2-azido-2-deoxy-β-D-galactopyranosyl chloride                                                                                                                                                              在
                                                                                                                                                                                 4 A molecular sieve   、                                                                                                  silver perchlorate   、                                                                                                  silver carbonate   、                                                                                                  
三氟乙酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷   、                                                                                         
氯仿                                                                                  为溶剂,
                                                                                                                                                    反应 50.0h,
                                                                                                                以52%的产率得到2-(trifluoroacetylamino)ethyl (2-azido-3,4,6-tri-O-acetyl-2-deoxy-α-D-galactopyranosyl)-(1->3)-[(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->2)-β-D-galactopyranosyl]-(1->4)-2-acetylamino-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranoside