ethyl (2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->3)-4,6-di-O-benzyl-2-deoxy-2-phthalimido-1-thio-β-D-galactopyranoside   、                                                                                      
5-azidopentyl (3-O-allyl-6-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-(1->3)-2,4,6-tri-O-benzyl-α-D-galactopyranoside                                                                                                                                                              在
                                                                                                                                                                                 4 A molecular sieve   、                                                                                                  
三氟甲烷磺酸甲酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以65%的产率得到5-azidopentyl (2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1->3)-(4,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl)-(1->4)-(3-O-allyl-6-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-(1->3)-2,4,6-tri-O-benzyl-α-D-galactopyranoside