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Synthesis 2007(20): 3155-3162
DOI: 10.1055/s-2007-990790
DOI: 10.1055/s-2007-990790
PAPER
© Georg Thieme Verlag Stuttgart · New YorkChlorotrimethylsilane-Mediated Synthesis of Functionalized 2-(2-Hydroxybenzoyl)pyrido[1,2-a]benzimidazoles
Further Information
Received
3 June 2007
Publication Date:
21 September 2007 (online)
Publication History
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.
Key words
3-formylchromone - benzimidazole - imidazole - pyrido[1,2-a]benzimidazole - imidazo[1,2-a]pyridine - recyclization - chlorotrimethylsilane
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