CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
p-Sulfonic acid calixarene-functionalized alkylbridged organosilica in esterification reactions
I. B. BRAGA; G. P. ROMANELLI; P. A. S. ABRANCHES; A. G.SATHICQ; S. FERNANDES; J. V. DE ASSIS; O. M. P. ZUÑIGA; A. G. SATO
Royal Society of Chemistry
Año: 2016 vol. 6 p. 24285 - 24285
Two new p-sulfonic acid calixarene- and p-sulfonic acid calixarene-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.