INVESTIGADORES
SAMBETH Jorge Enrique
artículos
Título:
A study of the temperature effect on Hantzsch reaction selectivity using Mn and Ce oxides under solvent-free conditions
Autor/es:
ORIANA D'ALESSANDRO; ANGEL G. SATHICQ; JORGE E. SAMBETH; HORACIO J. THOMAS; GUSTAVO P. ROMANELLI
Revista:
CATALYSIS COMMUNICATIONS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 60 p. 65 - 69
ISSN:
1566-7367
Resumen:
In this communication, four materials (CeO2, CeO2(Cu), MnOx, and MnOx(Cu)) were prepared, characterized and tested as catalysts, in solvent-free conditions, for the multicomponent Hantzsch reactions to obtain alternatively the 1,4-dihydropyridine or 2-phenylpyridine depending on the reaction conditions. 1,4-Dihydropyridine 4 was the main product formed at 80 °C (76%), and 2-phenylpyridine 7 was the main product at 40 °C (91%), in oxidant-free conditions, using CeO2 catalyst. It is the first report that shows that, not only the temperature but also the nature of the catalyst may change the product selectivity in Hantzsch reactions.
