Preparation of Recoverable Pd Catalysts for Carbonylative Cross-Coupling and Hydrogenation Reactions

摘要

We report on the synthesis, characterization and catalytic performance of new, supported Pd-II and Pd-0 catalysts. The catalysts are characterized by TEM, XRD, FTIR, X-ray photoelectron spectroscopy, and vibrating sample magnetometry. The catalysts are found to be active in both forms, Pd-II and Pd-0, for the carbonylative cross-coupling reaction of aryl iodides with arylboronic acids, and for the hydrogenation of aromatic nitroand unsaturated compounds. The newly developed catalysts are prepared by a synthetic strategy that is similar to the one used for other supported catalysts but are easier to recover- they can be recycled by magnetic separation from liquid phase reactions-and can be used for at least 5 consecutive trials without any decrease in activity.