One-pot synthesis of 2,3-diarylthieno[2,3-b]-, -[2,3-c]- or-[3,2-c]pyridines from the respective aryl(chloropyridinyl)methanones
The title three types of 2,3-diarylthienopyridines can be conveniently prepared from the respective aryl(chloropyridinyl)methanones in one-pot. The starting ketones react with sodium sulfide nonahydrate to generate aryl[(sodiosulfanyl)pyridinyl]methanones