哌嗪   、                                                                                      
8,10-dichloro-6,7-dihydro-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acid                                                                                                                                                                                              以
                                                                                         
二甲基亚砜                                                                                  为溶剂,
                                                                                                                                                    反应 7.0h,
                                                                                                                以Treatment of the reaction mixture in an analogous manner as in Example 4 gave 0.9 g of 8-(1-piperazinyl)-10-chloro-6,7-dihydro-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acid hydrochloride as white amorphous crystals的产率得到8-(1-piperazinyl)-10-chloro-6,7-dihydro-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acid hydrochloride