Palladium(II) complexes containing sterically bulky O, N donor ligands: Synthesis, characterization and catalytic activity in the Suzuki-Miyaura and Sonogashira coupling reactions

Article abstract of DOI:10.1016/j.jorganchem.2019.121080

A new class of palladium(II)1-(arylazo)naphtholate complexes of the type [Pd(L_1-4)₂] containing sterically bulky O, N donor functionalized arylazo ligands has been synthesized. These palladium(II) complexes were characterized by elemental analysis and spectral (FT-IR, UV–Vis, ¹H NMR and ¹³C NMR) studies. The molecular structure of the Palladium(II) complexes [Pd(L₁)₂] and [Pd(L₂)₂] were established by X-ray crystallography. These complexes were found to efficiently catalyze the Suzuki-Miyaura coupling of arylboronic acids and aryl halides, and the Sonogashira reaction of aryl halides and phenylacetylene in DMF and i-PrOH media to afford the corresponding C–C coupling products in high yields.