Palladium supported on an ion exchange resin for the Suzuki-Miyaura reaction

A basic anion exchange resin, Amberlite IRA-900, was loaded with Pd(C3H5)(C5H5) by an easy metal-organic chemical vapor deposition (MOCVD) approach to give Pd@IRA-900 catalyst after reduction at room temperature. Ultraviolet-Visible spectroscopy results showed a red shift of the absorption peak of Pd2+ after the Pd precursor was loaded on the resin, indicating that a chemical reaction occurred between the precursor and the support. Pd nanoparticles with 2.6 nm of average size were well dispersed on the support. The Pd@IRA-900 catalyst showed high activity for different kinds of aryl halides in Suzuki-Miyaura coupling reactions under mild and aerobic conditions. Excellent recyclability of Pd@IRA-900 catalyst was also observed in the Suzuki-Miyaura coupling reaction of iodobenzene and phenylboronic acid. A bifunctional catalyst Pd@IRA-900(OH) was synthesized by pretreating the ion exchange resin support with NaOH before Pd loading, which successfully catalyzed the Suzuki-Miyaura reaction of iodobenzene and phenylboronic acid without base under aerobic conditions.

Graphical AbstractPd@IRA-900 catalyst prepared by easily approached metal-organic chemical vapor deposition method was effective and recyclable in Suzuki coupling reaction.Figure optionsDownload full-size imageDownload as PowerPoint slide