sym-Tetracyanoethane in the synthesis of heterocycles. 4. Synthesis of 1-alkylideneimino-2-amino-3,4,4-tricyano-4,5-dihydropyrroles by the reaction of sym-tetracyanoethane with azines
sym-Tetracyanoethane in the synthesis of heterocycles. 4. Synthesis of 1-alkylideneimino-2-amino-3,4,4-tricyano-4,5-dihydropyrroles by the reaction of sym-tetracyanoethane with azines