Synthesis 2010(3): 437-442  
DOI: 10.1055/s-0029-1218595
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Sulfonic Acid Functionalized Silica: A Mild, Reusable and Efficient Heterogeneous Catalyst for the Highly Diastereoselective Synthesis of cis-Isoquinolonic Acids

Ali Reza Karimi*, Rahim Pashazadeh
Department of Chemistry, Arak University, Arak 38156, Iran
Fax: +98(861)4173406; e-Mail: a-karimi@araku.ac.ir;
Further Information

Publication History

Received 21 September 2009
Publication Date:
07 December 2009 (online)

Abstract

Sulfonic acid functionalized silica (SAFS) is found to be a recyclable heterogeneous catalyst for the rapid and efficient synthesis of various cis-isoquinolonic acids from the three-component condensation reaction of homophthalic anhydride, an amine, and an aldehyde. This reaction was highly diastereoselective and only one diastereomer was obtained in all cases.