INVESTIGADORES
VAZQUEZ Patricia Graciela
artículos
Título:
C-alkylation reactions catalyzed by silica-supported Keggin heteropolyacids?
Autor/es:
L. R. PIZZIO, P. G. VÁZQUEZ, C. V. CÁCERES, M. N. BLANCO, E. N. ALESSO, M.I. ERLICH,, R. TORVISO, L. FINKIELSZTEIN, B. LANTAÑO, G. Y. MOLTRASIO, J. M. AGUIRRE
Revista:
APPLIED CATALYSIS A-GENERAL
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2005 vol. 287 p. 1 - 8
ISSN:
0926-860X
Resumen:
Abstract
Aromatic alkylation reactions were studied using molybdophosphoric and tungstophosphoric acids supported on silica as catalysts.
Benzene and toluene alkylation was carried out with benzyl chloride or benzyl alcohol. Also, cyclohexene and cyclohexanol were used as
alkylating agents of toluene. These catalysts allow quantitative conversions in short times, with very good yields in monoalkylation products
and minimal formation of polyalkylation products. Regioselectivity in these reactions is similar to that described in literature for different
catalysts but the latter are markedly less efficient. In the reaction of formal [3 + 2] cycloaddition with benzyl alcohols catalyzed by silicasupported
molybdophosphoric acid, the results are similar to those previously obtained using SnCl4 as catalyst.4 as catalyst.