(E)-5-(3-nitrobenzylidene)thiazolidine-2,4-dione   、                                                                                      7-(4-(2-bromoacetyl) piperazin-1-yl)-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 potassium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以88%的产率得到1-cyclopropyl-6-fluoro-7-[4-[2-[(5-{E})-5-[(3-nitrophenyl)methylene]-2,4-dioxo-thiazolidin-3-yl]acetyl]piperazin-1-yl]-4-oxoquinoline-3-carboxylic acid