2-(trimethylsilyl)ethyl 6-O-tert-butyldiphenylsilyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl-(1->3)-4-O-acetyl-2,6-di-O-benzyl-β-D-galactopyranoside   、                                                                                      
6-O-acetyl-2,3,5-tri-O-benzoyl-β-D-galactofuranosyl trichloroacetimidate                                                                                                                                                              在
                                                                                                                                                                                 
三乙基硅基三氟甲磺酸酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 0.75h,
                                                                                                                以77.2%的产率得到2-(trimethylsilyl)ethyl 6-O-acetyl-2,3,5-tri-O-benzoyl-β-D-galactofuranosyl-(1->3)-6-O-tert-butyldiphenylsilyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl-(1->3)-4-O-acetyl-2,6-di-O-benzyl-β-D-galactopyranoside