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Abstract
2-Chloro-3,3-dicyano-acrylic-acid-ethylester 1 reacts with bisnucleophilic reagents to the heterocyclic compounds 2, 3, 5a-b and 6. With N,N-dialkylcyanamides the carbimidoyl chlorides 7a-d are obtained, which with mono- resp. bisnucleophiles lead to the substitution products 8a-b, 9a-c and 10a-c resp. the heterocycles 11a-c, 12a-d and 13a-d.