lithium diisopropyl amide   、                                                                                      
2-氟-4-(三氟甲基)苯胺   、                                                                                      
7-Chloro-6-fluoro-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 
四氢呋喃   、                                                                                                  
盐酸   、                                                                                                  
乙醚   、                                                                                                  
6-fluoro-7-(2-fluoro-4-trifluoromethyl-phenylamino)-5-oxo-1,2,3,5-tetrahydro-indolizine-8-carboxylic acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 19.25h,
                                                                                                                以to afford 150 mg (37% yield) of 6-fluoro-7-(2-fluoro-4-trifluoromethyl-phenylamino)-5-oxo-1,2,3,5-tetrahydro-indolizine-8-carboxylic acid as the required product的产率得到6-fluoro-7-(2-fluoro-4-trifluoromethyl-phenylamino)-5-oxo-1,2,3,5-tetrahydro-indolizine-8-carboxylic acid