1-(4-chloro-benzyl)-6,7-difluoro-4-oxo-1,4-dihydro-quinoline-3-carbonitrile   、                                                                                      
1-(2-吡啶基)哌嗪                                                                                                                                                                                                                                                                                                          以gave 1-(4-chloro-benzyl)-6-fluoro-4-oxo-7-(4-pyridin-2-yl-piperazin-1-yl)-1,4-dihydro-quinoline-3-carbonitrile的产率得到1-(4-chloro-benzyl)-6-fluoro-4-oxo-7-(4-pyridin-2-yl-piperazin-1-yl)-1,4-dihydro-quinoline-3-carbonitrile