methyl 5-(2,2,3,3,3-pentafluoropropionamido)-4-(morpholin-4-yl)-7,8,9-tri-O-acetyl-3,4,5-trideoxy-D-glycero-β-D-galacto-non-2-ulopyranosidonate                                                                                                                                                              在
                                                                                                                                                                                 
三氟乙酸酐   、                                                                                                  
三氟乙酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 0.25h,
                                                                                                                以80%的产率得到methyl 2,6-anhydro-5-(2,2,3,3,3-pentafluoropropionamido)-4-(morpholin-4-yl)-7,8,9-tri-O-acetyl-3,4,5-trideoxy-D-glycero-D-galacto-non-2-enonate