Bulky α-diimine palladium complexes supported graphene oxide as heterogeneous catalysts for Suzuki-Miyaura reaction

To explore high efficiency of the Suzuki-Miyaura reactions, an easily prepared heterogeous palladium precatalysts bearing sterically bulky α-diimine was covalently supported on graphene oxide (GO). The characterization of supported palladium complex was discussed in detail. A simple and efficient protocol for Pd-catalyzed cross coupling was described, which revealed that the bulky α-diimine ligand is crucial to promote the CAr-CAr transformation. This immobilized system provides a straightforward access to a wide range of aryl bromides with excellent functional groups tolerance. Sterically bulky α-diimine ligands palladium complex covalently supported on graphene oxide (GO) has been synthesized, exhibiting excellent efficiency for Suzuki cross coupling reactions under aerobic conditions. [Display omitted] •Readily synthesized heterogeous α-diimine-based palladium catalysts.•Bulky α-diimine ligand facilitate the transformation of Suzuki coupling.•Accommodate broad feasibility in a diversity of substrates scope.