4-O-acetyl-3-O-(4-O-acetyl-2,6-dideoxy-2-bromo-β-D-galactopyranosyl)-(1->3)-α-D-glucopyranosyl fluoride   、                                                                                      
α,β-acetyl 4-O-acetyl-3-O-(3,4-di-O-acetyl-2,6-dideoxy-2-iodo-β-D-glucopyranosyl)-(1->3)-D-glucopyranosyl trichloroacetimidate                                                                                                                                                              在
                                                                                                                                                                                 
叔丁基二甲硅基三氟甲磺酸酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 1.25h,
                                                                                                                以86%的产率得到4-O-acetyl-3-O-(4-O-acetyl-3-O-(3,4-di-O-acetyl-6-deoxy-2-deoxy-2-iodo-β-D-glucopyranosyl-(1->3)-4-O-acetyl-6-deoxy-2-deoxy-2-iodo-β-D-glucopyranosyl-(1->3))-2,6-dideoxy-2-bromo-β-D-galactopyranosyl)-(1->3)-α-D-glucopyranosyl fluoride