p-Sulfonic acid calix[n]arenes as homogeneous and recyclable organocatalysts for esterification reactions
作者:Sergio Antonio Fernandes、Ricardo Natalino、Poliana Aparecida Rodrigues Gazolla、Márcio José da Silva、Gulab Newandram Jham
DOI:10.1016/j.tetlet.2012.01.078
日期:2012.3
Esterification yields were significantly improved using calix[n]arenes catalysts under simple conditions. p-Sulfonic acid calix[4]arene and p-sulfonic acid calix[6]arene were powerful organocatalysts in several esterification reactions, which showed activity comparable or even superior to other well-established acids catalysts, such as, sulfuric acid, p-toluenesulfonic acid, and p-hydroxybezenesulfonic acid described in the literature. (C) 2012 Elsevier Ltd. All rights reserved.