Event submissions
1,6-diamino-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile, prepared by the reaction of cyanoacetohydrazide with arylmethylene malononitriles, react with ninhydrin to give correspondingWith the formation of derivatives of dihydroindeno[1,2-e]pyrido[1,2-b][1,2,4]triazines. The reaction with glyoxal proceeds under mild conditions with the formation of 1,2,4-triazolo[1,5-a]pyridine.