Synthesis, chemical reactivity and fungicidal activity of pyrido[1,2-b][1,2,4]triazine derivatives

• Autor(a) principal: Ibrahim,Magdy A.
• Data de Publicação: 2009
• Outros Autores: Abdel-Rahman,Reda M., Abdel-Halim,Ali M., Ibrahim,Salah S., Allimony,Hassan A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Chemical Society (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000700012
• topic: synthesis; o-diamines; pyridotriazines; fungicidal activity

The synthesis of some new pyrido[1,2-b][1,2,4]triazines (2-12) was achieved by cyclocondensation of 4-aryl-1,6-diamino-2-oxo-1,2-dihydropyridine-3,5-dicarbonitriles (1a, b) with α,β-bifunctional compounds. Pyrido[1,2:2´,3´]triazino[5´,6´-f]triazines (13-14) were also prepared. The behavior of 1a, b toward interactions with indole-2,3-dione and its N-acetyl analogue have been studied under different reaction conditions. The structures of the new products have been deduced from elemental analysis and spectral data (UV, IR, ¹H NMR, 13C NMR and mass spectra). The new synthesized compounds were screened for their antifungal activities.