Application of Silica Gel-supported Polyphosphoric Acid (PPA/SiO<sub>2</sub>) as a Reusable Solid Acid Catalyst for One-Pot Multi-Component Synthesis of 3,4,5-substituted furan-2(5H)-ones
A facile one-pot synthesis of 3,4,5-substituted furan-2(5H)-one derivatives from a three-component reaction of aniline derivatives, dialkylacetylenedicarboxylates and aromatic aldehydes under mild conditions using tetra-n-butylammonium bisulfate as a catalyst has been developed. (C) 2013 Malek Taher Maghsoodlou. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.