Non-catalytic conversion of 4-oxoalkane-1,1,2,2-tetracarbonitriles in the presence of water leads to the mixture of fluorescent 4-cyano-2-oxo-1,2-dihydropyridine-3-carboxamides and 2-oxo-1,2-dihydropyridine-3,4-dicarbonitriles in equal proportions.
Transformation of 4-oxoalkane-1,1,2,2-tetracarbonitriles under the action of Lawesson's reagent leads to 2,2′-disulfanediylbis(1