Efficient, convenient and reusable polyaniline-sulfate salt catalyst for the synthesis of quinoxaline derivatives

Biologically important quinoxaline derivatives were prepared in excellent yields using very low amount of reusable polyaniline-sulfate salt catalyst from various 1,2-dicarbonyls and aromatic 1,2-diamines. This methodology is also very much useful for the synthesis of new quinoxaline derivative using sterically hindered diamine. (c) 2006 Elsevier B.V. All rights reserved.