Direct synthesis of 3-arylquinolines by a nano Pd-catalyzed regioselective C3-H arylation of quinolines

Abstract

3-Arylquinolines are biologically and medicinally very important compounds. Direct and regioselective C3-H arylation offers a straight forward methodology for their synthesis. In this work, we report their synthesis by a Pd nanoparticle catalyzed reaction with aryliodonium salts as the arylating agent in the presence of stoichiometric oxidant Cu(OAc)2. The reaction works with different quinolines and diaryliodonium salts with both electron donating and electron withdrawing groups. The advantage of the methodology is that it does not require any ligand and the catalyst also is recoverable and recyclable.