Synthesis and characterization of 3-pyridylchalcogen compounds

A convenient methodology, which efficiently promoted one-pot synthesis of 3-pyridylchalcogen (Se, Te) compounds, has been developed. Under non-cryogenic conditions, 3,3′-dipyridyl diselenide/ditelluride and other unsymmetrical derivatives were prepared by the reaction of 3-bromopyridine with the isopropyl magnesium chloride (i-PrMgCl) followed by the addition of chalcogen (Se/Te) and with variety of electrophiles. The known and unknown compounds were characterized by elemental analysis, NMR (1H, 13C, 77Se and 125Te), FT-IR and Mass spectroscopy.