2-[N'-(4-chlorophenylmethylen)-hydrazone]-8,8-dimethyl-5-(4-nitrophenyl)-5,8,9,10-tetra-hydropyrimido[4,5-b]quinoline-4,6-dione                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
乙酸酐                                                                                                                                  作用下,
                                                                                                                                                                                        反应 8.0h,
                                                                                                                以52%的产率得到3-(4-chlorophenyl)-8,8-dimethyl-5-(4-nitrophenyl)-5,8,9,10-tetrahydro[1,2,3] triazolo [4',3':1,2]pyrimido[4,5-b]quinoline-4,6-dione