Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/1988
Título: New azaheterocyclic aromatic diphosphonates for hybrid materials for fuel cell applications
Autor: Teixeira, Fátima C.
Rangel, C. M.
Teixeira, A. P. S.
Palavras-chave: Diphosphonates
Hybrid materials
Fuel cell applications
Data: 2013
Editora: RSCPublishing
Citação: Teixeira, Fátima C.; Rangel, C.M.; Teixeira, António P.S. New azaheterocyclic aromatic diphosphonates for hybrid materials for fuel cell applications. In: New Journal of Chemistry, 2013, Vol. 37, nº 10, p. 3084-3091
Resumo: New azaheterocyclic aromatic diphosphonate derivatives of benzimidazole and benzotriazole were synthesized by nickel-catalyzed Arbuzov reaction of 4,7-dibromo-2,1,3-benzothiadiazole with triethyl phosphite, followed by reductive sulfur extrusion reaction and cyclization. This new strategy allowed us to obtain these compounds with high efficiency, with the generation of these azaheterocyclic aromatic diphosphonate derivatives in good to excellent yields, since these compounds could not be synthesized by direct cross-coupling reactions catalyzed by palladium or nickel. All compounds were characterized by NMR, IR spectroscopy and mass spectrometry (low and high resolution). NMR studies of compound 9 showed the presence of only one tautomeric form, on the NMR time scale, in different solvents and at different concentrations.
URI: http://hdl.handle.net/10400.9/1988
ISSN: 1144-0546
Versão do Editor: http://dx.doi.org/10.1039/C3NJ00585B
Aparece nas colecções:UTCAE - Artigos em revistas internacionais

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