Table of Contents
Organic Chemistry International
Volume 2013 (2013), Article ID 848237, 14 pages
Research Article

Synthesis of Bis-2,3-dihydroquinazolin-4(1H)-ones and 2,3-Dihydroquinazolin-4(1H)-ones Derivatives with the Aid of Silica-Supported Preyssler Nanoparticles

1Department of Chemistry, Islamic Azad University, Mashhad, Iran
2Agricultural Researches and Services Center, Mashhad, Iran

Received 28 April 2013; Revised 8 June 2013; Accepted 9 June 2013

Academic Editor: Ashraf Aly Shehata

Copyright © 2013 Ali Gharib et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


One-pot three-component condensation of isatoic anhydride with primary amines or ammonium carbonate and aromatic aldehydes in refluxing ethanol in the presence of catalytic amounts of silica-supported preyssler nanoparticles (SPNP) afforded the corresponding 2,3-dihydroquinazolin-4(1H)-ones in high yields, and bis-dihydroquinazolinones were synthesized for the first time by a novel pseudo-five-component condensation of isatoic anhydride, a primary amine, and a dialdehyde in water. The catalyst is reusable and can be applied several times without any decrease in product yield.