Synthesis 2007(12): 1861-1871  
DOI: 10.1055/s-2007-983704
PAPER
© Georg Thieme Verlag Stuttgart · New York

Chlorotrimethylsilane-Mediated Synthesis of Functionalized Fused Pyridines: Reaction of 3-Formylchromones with Electron-Rich Aminoheterocycles

Sergey V. Ryabukhina,b, Andrey S. Plaskona,b, Dmitriy M. Volochnyuk*a,c, Andrey A. Tolmachevb
a Enamine Ltd., Alexandra Matrosova st. 23, 01103 Kiev, Ukraine
b National Taras Shevchenko University of Kiev, Volodimirska st. 62, 01033 Kiev, Ukraine
c Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska 5, Kiev-94, 02094, Ukraine
Fax: +380(44)5373253; e-Mail: D.Volochnyuk@enamine.net;
Further Information

Publication History

Received 2 March 2007
Publication Date:
08 June 2007 (online)

Abstract

The reaction of 3-formylchromones with aminoheterocycles was investigated. A simple and flexible general procedure for annulation of 5-(2-hydroxybenzoyl)pyridines was proposed. The best reaction conditions were found to be heating the reaction mixture in DMF in the presence of Me3SiCl as a promoter and water as scavenger.