3-piperazin-1-yl-1H-indazole hydrochloride   、                                                                                      
6-(2-chloroethyl)-3,4-dimethyl-3,4-dihydro-1H-quinolin-2-one                                                                                                                                                              在
                                                                                                                                                                                 6-{2-[4-(1H-indazol-3-yl)-piperazin-1-yl]-ethyl}-3,4-dimethyl-3,4-dihydro-1H-quinolin-2-one   、                                                                                                  crude product   、                                                                                                  silica gel   、                                                                                                  
甲醇   、                                                                                                  
乙酸乙酯                                                                                                                                  作用下,
                                                                                                                                                                                                                            以to give the title compound as a white, foamy solid, yield=781 mg (46%)的产率得到6-{2-[4-(1H-indazol-3-yl)-piperazin-1-yl]-ethyl}-3,4-dimethyl-3,4-dihydro-1H-quinolin-2-one