、                                                                                      
phenyl 6-acetyl-4-O-benzyl-3-O-tert-butyldimethylsilyl-2-deoxy-1-thio-2-(2,2,2-trichloroethoxycarbamonyl)-β-D-galactopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
N-碘代丁二酰亚胺   、                                                                                                  
三氟甲磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                以76%的产率得到2-(trimethylsilyl)ethyl 6-O-acetyl-4-O-benzyl-3-O-tert-butyldimethylsilyl-2-deoxy-2-(2,2,2-trichloroethoxycarbamonyl)-β-D-galactopyranosyl-(1->4)-{methyl 4,7,8,9-tetra-O-acetyl-3,5-dideoxy-5-(2,2,2-trichloroethoxycarbamonyl)-D-glycero-α-D-galacto-2-nonulopyranosylonate-(2->3)}-2,6-di-O-benzyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside