Supported palladium metal as heterogeneous catalyst precursor for the methoxycarbonylation of cyclohexene

• Published in: Molecular catalysis 2020-03, Vol.484, p.110742, Article 110742
• Main Authors: Vavasori, Andrea, Bravo, Sara, Pasinato, Francesco, Kudaibergenov, Nurbolat, Pietrobon, Luca, Ronchin, Lucio
• Format: Article
• Language: English
• Subjects: Carbonylation; Palladium catalyst; Supported homogeneous catalysis
• ISSN: 2468-8231; 2468-8231
• DOI: 10.1016/j.mcat.2019.110742

[Display omitted] •Pd metal is used as catalyst precursor for the methoxycarbonylation of cyclohexene.•Pd/cations exchanging resin led to activity comparable to the homogeneous catalysis.•The leaching of Pd was negligible and the system has been efficiently recycled.•The catalyst precursor can be efficiently recovered through a simple filtration step. The methoxycarbonylation of cyclohexene has been carried out by using Pd metal deposited on a support as heterogeneous precursors instead of the homogeneous Pd(II) complexes usually proposed in literature. The two catalytic systems (homogeneous and heterogeneous) have been compared in methanol in the presence of free triphenylphosphine and p-toluenesulfonic acid as promoter. The precursor Pd on Amberlyst IRC 50 led to the best catalytic activity which is comparable to the activity obtained by using the homogeneous Pd(II)-catalyst. The leaching of the metal was negligible and the system has been efficiently recycled at least for three times. A reaction mechanism has been also proposed and discussed.