Polystyrene-supported palladium(II) N,N-dimethylethylenediamine complex: A recyclable catalyst for Suzuki–Miyaura cross-coupling reactions in water

• The heterogeneous Pd(II) complex was synthesized from macroporous chloromethylated polystyrene.
• It shows excellent catalytic activity for Suzuki–Miyaura cross-coupling reactions.
• This catalyst can be reused several times with slight change in activity.

The polystyrene-supported Pd(II) N,N-dimethylethylenediamine complex was prepared and characterized by various techniques, including Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), atomic absorption spectroscopy (AAS), and thermal analysis (TG-DTA). This heterogeneous Pd(II) catalyst works efficiently for the Suzuki–Miyaura coupling of arylboronic acids with aryl bromides in aqueous medium. The effect of base, and additives for the C–C coupling reactions were reported. Further, the catalyst can be easily recovered quantitatively by simple filtration and reused up to five times without significant loss in its catalytic activity.

The new polymer-anchored Pd(II) N,N-dimethylethylenediamine complex 3 is found to be an efficient catalyst for Suzuki–Miyaura cross-coupling reactions of arylboronic acids with aryl bromides. The catalyst showed high stability and could be successfully reused for five reaction cycles.Figure optionsDownload as PowerPoint slide