Synthesis of mesoionic 1,2,4-triazolo[4,3-a]pyrimidin-5-ones and subsituted formamidines from diethyl (5-1-r-1h-1,2,4-triazol -3-yl)aminomethylenemalonates
Synthesis of mesoionic 1,2,4-triazolo[4,3-a]pyrimidin-5-ones and subsituted formamidines from diethyl (5-1-r-1h-1,2,4-triazol -3-yl)aminomethylenemalonates