Polystyrene-polyamidoamine-supported gold nanoparticles were prepared using a reductant-directed formation strategy. The resulting catalysts exhibited excellent activities in the aerobic oxidation of benzyl alcohols and the homocoupling of phenylboronic acids under mild conditions and can be recycled at least 14 times without significant loss of activity.
Magnetically recyclable Hoveyda-Grubbs catalyst can be readily assembled using magnetic nanoparticles as support, and this catalyst combines convenient recyclability and excellent activity on ring-closing metathesis (RCM) reactions.
Metathesis Reactions. -A new type of Hoveyda-Grubbs catalyst is developed by assembling magnetic nanoparticles with Grubbs 1 catalyst. This type of catalyst is found to be effective in the synthesis of a series of cyclic olefins and found to be active without loss of catalytic activity after repeated use. -(CHE*, C.; LI, W.; LIN, S.; CHEN, J.; ZHENG, J.; WU, J.-C.; ZHENG, Q.; ZHANG, G.; YANG, Z.; JIANG, B.; Chem.
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