CINDECA   05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
artículos
Título:
p-Sulfonic acid calix[4]arene-functionalized alkylbridged organosilica in esterification reactions
Autor/es:
I. B. BRAGA; G. P. ROMANELLI; P. A. S. ABRANCHES; A. G.SATHICQ; S. FERNANDES; J. V. DE ASSIS; O. M. P. ZUĂ‘IGA; A. G. SATO
Revista:
RSC
Editorial:
Royal Society of Chemistry
Referencias:
Año: 2016 vol. 6 p. 24285 - 24285
Resumen:
Two new p-sulfonic acid calix[4]arene- and p-sulfonic acid calix[6]arene-functionalizedorganosilica have been synthesized using the sol-gel method and applied as heterogeneouscatalysts in esterification reactions. The catalytic performance was evaluated using theesterification of carboxylic acids with ethanol, and good catalytic activity (i.e., 55-88%) wasobserved under the optimum reaction conditions. This study reports the first promisingexample of successful employment of calix[n]arenes as a heterogeneous catalyst forcatalytic esterification. The catalyst was easily separated by filtration and reused five timeswithout any significant loss of activity.
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