benzyl 2,4,6-tri-O-pivaloyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-pivaloyl-β-D-glucopyranoside   、                                                                                      phenyl 3,4,6-tri-O-acetyl-2-deoxy-1-thio-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,
                                                                                                                                                                                        以72%的产率得到benzyl 3,4,6-tri-O-acetyl-2-deoxy-α-D-galactopyranosyl-(1,3)-2,4,6-tri-O-pivaloyl-β-D-galactopyranosyl-(1,4)-2,3,6-tri-O-pivaloyl-β-D-glucopyranoside