2,3,4-tri-O-acetyl-6-O-tert-butyldimethylsilyl-β-D-glucopyranosyl-(1->4)-2,3-di-O-acetyl-6-O-tert-butyldimethylsilyl-β-D-glucopyranosyl-(1->6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose                                                                                                                                                              在
                                                                                                                                                                                 
溴   、                                                                                                  
三苯基膦                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 19.0h,
                                                                                                                以96%的产率得到2,3,4-tri-O-acetyl-6-bromo-6-deoxy-β-D-glucopyranosyl-(1->4)-2,3-di-O-acetyl-6-bromo-6-deoxy-β-D-glucopyranosyl-(1->6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose