Synthesis 2007(20): 3155-3162  
DOI: 10.1055/s-2007-990790
PAPER
© Georg Thieme Verlag Stuttgart · New York

Chlorotrimethylsilane-Mediated Synthesis of Functionalized 2-(2-Hydroxybenzoyl)pyrido[1,2-a]benzimidazoles

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

Publication History

Received 3 June 2007
Publication Date:
21 September 2007 (online)

Abstract

Heating 3-formylchromone with a variety of benzimidazoles and imidazoles in N,N-dimethylformamide in the presence of chlorotrimethylsilane as a promoter and water-scavenger gave functionalized pyrido[1,2-a]benzimidazoles and imidazo[1,2-a]pyridines.