Occurrence of ligand coupling in the reaction of the 2‐thienyl sulfoxides with organometallic compounds

Abstract

Abstract Treatment of 2‐pyridyl 2‐thienyl sulfoxide with 2‐thienyllithium was found to give both 2‐(2‐pyridyl)thiophene 2 and 2,5‐(di‐2‐pyridyl)thiophene 3 . The reaction between 2‐thienyllithium and thionyl chloride was found to give 2,2′‐bithienyl 8 , a coupling product, which is also formed by the reaction between di‐2‐thienyl sulfoxide 7 and 2‐thienyllithium.