Chiral rhodium complexes covalently anchored on carbon nanotubes for enantioselective hydrogenation
2014
Gheorghiu, Constanta Cristina | Machado, Bruno F. | Salinas Martínez de Lecea, Concepción | Gouygou, Maryse | Román-Martínez, M. Carmen | Serp, Philippe | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales | Materiales Carbonosos y Medio Ambiente
Chiral rhodium hybrid nanocatalysts have been prepared by covalent anchorage of pyrrolidine-based diphosphine ligands onto functionalized CNTs. This work constitutes the first attempt at covalent anchoring of homogeneous chiral catalysts on CNTs. The catalysts, prepared with two different chiral phosphines, were characterized by ICP, XPS, N2 adsorption and TEM, and have been tested in the asymmetric hydrogenation of two different substrates: methyl 2-acetamidoacrylate and α-acetamidocinnamic acid. The hybrid nanocatalysts have shown to be active and enantioselective in the hydrogenation of α-acetamidocinnamic acid. A good recyclability of the catalysts with low leaching and without loss of activity and enantioselectivity was observed.
Mostrar más [+] Menos [-]The authors acknowledge the financial support from the Institut National Polytechnique de Toulouse (ENSIACET), the Centre National de la Recherche Scientifique, MICINN, Project MAT2012-32832, GVA and FEDER, Project Prometeo 2009/047, and MEC for the FPU scholarship of C.C.G.
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