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

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.

Ryabukhin S. V.; Plaskon A. S.; Volochnyuk D. M.; Tolmachev A. A.
Synthesis 2007, 20, 3155-3162
DOI: 10.1055/s-2007-990790