Synthesis 2002(4): 0466-0470
DOI: 10.1055/s-2002-20956
PAPER
© Georg Thieme Verlag Stuttgart · New York

Catalysis of the Biginelli Reaction by Ferric and Nickel Chloride Hexahydrates. One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones

Jun Lu*, Yinjuan Bai
Department of Chemistry, Northwest University, Shaanxi Province Key Laboratory of Physico-inorganic Chemistry. Xi’an, Shaanxi 710069, P. R. China
e-Mail: lujunyue@hotmail.com;
Further Information

Publication History

Received 19 November 2001
Publication Date:
28 July 2004 (online)

Abstract

An efficient synthesis of 3,4-dihydropyrimidinones from the aldehyde, β-keto ester and urea in ethanol, using ferric chloride hexahydrate or nickel chloride hexahydrate as the catalyst, is described. Compared with the classical Biginelli reaction conditions, this new method has the advantage of excellent yields (53-97%) and short reaction time (4-5 hours).