Role of aurone ligands in microwave enhanced Mn (<scp>II</scp>) and Co (<scp>II</scp>) catalyzed dehydrogenative coupling reaction: An efficient ligand for the synthesis of quinoline, pyridine, and pyrrole

Abstract

Abstract The role of new series of phosphine‐free aurone ligands have been investigated in microwave‐enhanced Mn (II) and Co (II) dehydrogenative coupling reactions. Various heterocyclic compounds such as Quinoline, pyridine, and pyrrole have been synthesized and characterized by NMR spectroscopy. The synthesized ligands ( L1 – L4 ) with Mn(II) and Co (II) salt showed excellent catalytic activity and proved to be very effective for the dehydrogenative coupling reaction. This synthetic method involves the in‐situ formation of a metal ligand complex that was analyzed by mass spectrometry. A broad range of substrates including aliphatic ketone, heterocycles, and sterically hindered Ketone coupling partners are well tolerated in the developed protocol.