methyl (phenyl 5-acetamido-4-O-benzoyl-3,5-dideoxy-8,9-O-isopropylidene-2-thio-D-glycero-alpha-D-galacto-2-nonulopyranosid)onate                                                                                                                                                              在
                                                                                                                                                                                 
三氧化硫吡啶   、                                                                                                  
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二甲基亚砜                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                以95%的产率得到methyl (phenyl 5-acetamido-4-O-benzoyl-3,5-dideoxy-8,9-O-isopropylidene-7-oxo-2-thio-D-glycero-alpha-D-galacto-2-nonulopyranosid)onate