Novel Co-CP/γ-MnO2 composite as a powerful catalyst for C–C Suzuki coupling reaction

Developing low-cost catalytic systems for C–C coupling reactions is desirable but challenging. Herein, a coordination polymer (Co-CP) was fabricated on the surface of γ-MnO₂ through a layer-by-layer growth technique to obtain a cost-effective heterogeneous catalyst. Various physicochemical analyses endorsed the presence of both components, γ-MnO₂ and Co-CP in the prepared composite. This compound demonstrated a remarkable catalytic performance (in some cases more than 99 %) in the Suzuki coupling reaction of a wide range of arylboronic acids and aryl bromides in water:DMF medium. In particular, the prepared catalyst was efficient and maintained its activity after five consecutive utilizations. From the viewpoint of economics, the present catalytic system gathers noticeable advantages, like the use of earth-abundant and cheap metals (Co and Mn).