3,4-di-O-acetyl-2-O-benzyl-α-L-fucopyranosyl trichloroacetimidate   、                                                                                      
thexyldimethylsilyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-6-O-acetyl-2-azido-2-deoxy-β-D-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
三氟甲磺酸三甲基硅酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                以90%的产率得到thexyldimethylsilyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-[3,4-di-O-acetyl-2-O-benzyl-α-L-fucopyranosyl-(1->3)]-6-O-acetyl-2-azido-2-deoxy-β-D-glucopyranoside