Preparation of a novel silica gel-adsorbed Brønsted acid catalyst for the solvent-free esterification of bromoacetic acid with benzyl alcohol
摘要:
A new bifunctional Bronsted acid catalyst that contains two sulfo groups was prepared. The adsorption of this new bifunctional Bronsted acid catalyst on silica gel made it possible to be reused 10 times without a loss of catalytic activity in the solvent-free esterification of bromoacetic acid with an equiv. of benzyl alcohol without the formation of dibenzyl ether. (C) 2012 Elsevier B.V. All rights reserved.
Bis-sulfonic Acid Ionic Liquids for the Conversion of Fructose to 5-Hydroxymethyl-2-furfural
作者:Sang Sim、Sunjeong Kwon、Sangho Koo
DOI:10.3390/molecules171112804
日期:——
Homogenous bis-sulfonic acid ionic liquids (1 mol equiv.) in DMSO (10 mol equiv.) at 100 °C efficiently mediated the conversion of D-fructose into 5-hydroxymethyl-2-furfural in 75% isolated yield, which was roughly a 10% increment compared to the case of the mono-sulfonic acid ionic liquids.