名称:
                                Synthesis of 4H-Pyrazino[1,2-a]pyrimidine-4,9(8H)-diones and Imidazo[1,2-a]pyrazin-8(7H)-ones
                             
                            
                                摘要:
                                A facile method of synthesis of 4H-pyrazino[1,2-a]-pyrimidine-4,9(8H)-diones and imidazo[1,2-a]pyrazin-8(7H)-ones from the corresponding 3-amino-2(1H)-pyrazinones is described.