Synthesis 2008(7): 1069-1077  
DOI: 10.1055/s-2008-1066988
PAPER
© Georg Thieme Verlag Stuttgart · New York

A New One-Step Route for the Synthesis of Fused Pyrido[1,2-a]pyrimidin-4-ones

Andrey S. Plaskona,b, Sergey V. Ryabukhina,b, Dmitriy M. Volochnyuk*a,c, Andrey A. Tolmachevb
a Enamine Ltd., 23 Alexandra Matrosova Str., 01103 Kiev, Ukraine
Fax: +380(44)5373253; e-Mail: D.Volochnyuk@enamine.net;
b National Taras Shevchenko University, 62 Volodymyrska Str., 01033 Kiev, Ukraine
c Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska Str., 02094 Kiev, Ukraine
Further Information

Publication History

Received 20 November 2007
Publication Date:
06 March 2008 (online)

Abstract

The cyclization of 3-formylchromone with a variety of 2-methylpyrimidin-4(3H)-ones promoted by chlorotrimethylsilane was investigated. A simple and flexible general procedure for the synthesis of a series of fused pyrido[1,2-a]pyrimidin-4-ones is proposed. A set of functionally and structurally diverse pyrido[1,2-a]pyrimidin-4-ones were obtained in high yields.