An Efficient and Recyclable Magnetic-Nanoparticle-Supported Palladium Catalyst for the Suzuki Coupling Reactions of Organoboronic Acids with Alkynyl Bromides

[摘要]：A highly active, air- and moisture-stable and easily recoverable magnetic-nanoparticle-supported palladium catalyst has been developed for the Suzuki cross-coupling reaction of organoboron derivatives with alkynyl bromides. In the presence of palladium catalyst (0.5 mol%), organoboron derivatives including aromatic and aliphatic boronic acids, potassium aryltrifluoroborates, and sodium tetraphenylborate reacted smoothly with 1-bromo-2-substituted acetylenes to generate the corresponding cross-coupling products in good to excellent yields in ethanol. In addition, it is possible to recover and reuse the supported palladium catalyst at least 16 times without significant loss of its catalytic activity.

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