Dendron-Functionalized Core–Shell Superparamagnetic Nanoparticles : Magnetically Recoverable and Reusable Catalysts for Suzuki C-C Cross-Coupling Reactions Article - 2009

Daniel Rosario-Amorin, Xin Wang, Manuel Gaboyard, Rodolphe Clérac, Sylvain Nlate, Karine Heuzé

Daniel Rosario-Amorin, Xin Wang, Manuel Gaboyard, Rodolphe Clérac, Sylvain Nlate, Karine Heuzé, « Dendron-Functionalized Core–Shell Superparamagnetic Nanoparticles : Magnetically Recoverable and Reusable Catalysts for Suzuki C-C Cross-Coupling Reactions  », Chemistry - A European Journal, 2009, pp. 12636-12643. ISSN 0947-6539

Abstract

A metallodendron functionalized with dicyclohexyldiphosphino palladium complex was synthesized. The metallodendron was grafted onto core–shell superparamagnetic nanoparticles (g-Fe2O3/polymer, 200–500 nm) to give optimal catalytic reactivity in cross-coupling reactions. The grafted nanoparticles were used as recoverable and reusable catalysts for Suzuki C-C cross-coupling reactions. They showed remarkable reactivity towards iodoand bromoarenes under mild conditions, and unprecedented reactivity towards chloroarenes. On completion of the catalytic reaction, the catalysts were readily recovered by using a simple magnet to attract the superparamagnetic grafted nanoparticles. Catalysts were recovered more than 25 times with almost no discernable loss of reactivity.

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