Amorphous carbon-silica composites bearing sulfonic acid as solid acid catalysts for the chemoselective protection of aldehydes as 1,1-diacetates and for N-, O- and S-acylations
- 15 July 2011
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Green Chemistry
- Vol. 13 (9), 2365-2372
- https://doi.org/10.1039/c0gc00900h
Abstract
Amorphous carbon-silica composites bearing sulfonic acid derived from inexpensive natural organic compounds (glucose, maltose, cellulose, chitosan and starch) were prepared by partial carbonization followed by sulfonation and their catalytic activity was evaluated for the protection of aldehydes as 1,1-diacetates and for N-, O- and S-acylations under solvent-free conditions. Different biomaterials have been chosen, with a view to select the most active solid acid catalyst. Carbon-silica composites were characterized by FTIR, XRD and elemental analysis. Sulfonated carbon-silica composite derived from starch was found to be the most active and could be recycled for several runs without loss of significant activity. It was also characterized by TGA, SEM and TEM.This publication has 68 references indexed in Scilit:
- Synthesis and characterization of BEA-SO3H as an efficient and chemoselective acid catalystJournal of Molecular Catalysis A: Chemical, 2011
- Progress of the Application of Mesoporous Silica-Supported Heteropolyacids in Heterogeneous Catalysis and Preparation of Nanostructured Metal OxidesMaterials, 2010
- Sulfonic acid functionalized crystal-like mesoporous benzene–silica as a remarkable water-tolerant catalystChemical Communications, 2009
- Sulfonic acid functionalized mesoporous silicas and organosilicas: Synthesis, characterization and catalytic applicationsJournal of Molecular Catalysis A: Chemical, 2007
- Silica functionalized sulfonic acid as a recyclable interphase catalyst for chemoselective thioacetalization of carbonyl compounds in waterJournal of Molecular Catalysis A: Chemical, 2007
- Significant enhancement on selectivity in silica supported sulfonic acids catalyzed reactionsChemical Communications, 2007
- Silica-supported ZnCl2 — A highly active and reusable heterogeneous catalyst for the one-pot synthesis of dihydropyrimidinones–thionesCanadian Journal of Chemistry, 2007
- Copper perchlorate: Efficient acetylation catalyst under solvent free conditionsJournal of Molecular Catalysis A: Chemical, 2006
- Hydrolysis of sugars catalyzed by water-tolerant sulfonated mesoporous silicasCatalysis Letters, 2005
- Fe2(SO4)3· xH2O Catalytic Esterification of Aliphatic Carboxylic Acids with AlcoholsSynthetic Communications, 1998