2,3,4-Tri-O-(4-Chlorobenzyl)-6-Deoxy-L-Galactopyranoside 1-O-Trichloroacetimidate   、                                                                                      
6-O-benzoyl-3,4-O-isopropylidene-β-D-galactopyranosyl-(1->4)-2,3;4,6-di-O-isopropylidene-D-glucose dimethyl acetal                                                                                                                                                              在
                                                                                                                                         
三氟甲磺酸三甲基硅酯                                                                                                                                                                                                                               三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                以86%的产率得到O-[2,3,4-tri-O-(4-chlorobenzyl)-6-deoxy-α-L-galactopyranosyl]-(1-2)-O-(6-O-benzoyl-3,4-O-isopropylidene-β-D-galactopyranosyl)-(1-4)-2,3:5,6-di-O-isopropylidene-D-gIucose dimethylacetal