Antimykotische wirkstoffe. XIX. 4,6-Disubstituierte 2-(cyanamino)pyrimidine

The reaction of city dicyandiamide ( 1 ) with β-diketones 2a-c leads to 2-(cyanoamino)pyrimidines 3a-c. Structure type 3 is supported by spectroscopic data, while at the same time a 1-cyano-2-imino structure ( 4 ) is excluded. Compound 3a exhibits fungistatic and nematicidal activity.