2-methyl-1,4-benzodioxan-substituted bis(nhc)pdx2 complexes: synthesis, characterization and the catalytic activity in the direct arylation reaction of some 2-alkyl-heterocyclic compounds

Almost in all fields of chemistry, the c–c cross-coupling reactions such as the direct arylation reaction have attracted much attention and have advanced quickly in recent years due to the importance of environment-friendly properties. this study contains the synthesis of the 2-methyl-1,4-benzodioxan-substituted bis(nhc)pdx2 complexes and their catalytic activity in direct arylation reaction. the bis(nhc)pdx2 complexes have been prepared from the 2-methyl-1,4-benzodioxan-substituted ag(i)nhc complexes via transmetallation method. the bis(nhc)pdx2 complexes have been characterized using 1h nmr, 13c nmr, ft-ir spectroscopy and elemental analysis techniques. the bis(nhc)pdx2 complexes have been examined as catalysts in the direct arylation reactions with 2-n-butylfuran, 2-n-butylthiophene and 2-isopropylthiazole, and have demonstrated excellent activity in these reactions.