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Platinum N-Heterocyclic Carbene Nanoparticles as New and Effective Catalysts for the Selective Hydrogenation of Nitroaromatics

Authors

  • Dr. Patricia Lara,

    Corresponding author
    1. Instituto de Investigaciones Químicas (IIQ) and Departamento de Química Inorgánica, Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla, Avda. Américo Vespucio, 49, 41092 Sevilla (Spain), Fax: (+34) 954-46-01-65
    • Instituto de Investigaciones Químicas (IIQ) and Departamento de Química Inorgánica, Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla, Avda. Américo Vespucio, 49, 41092 Sevilla (Spain), Fax: (+34) 954-46-01-65

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  • Dr. Andrés Suárez,

    1. Instituto de Investigaciones Químicas (IIQ) and Departamento de Química Inorgánica, Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla, Avda. Américo Vespucio, 49, 41092 Sevilla (Spain), Fax: (+34) 954-46-01-65
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  • Vincent Collière,

    1. Laboratoire de Chimie de Coordination; CNRS; LCC, 205 Route de Narbonne, 31077 Toulouse (France)
    2. Université de Toulouse, UPS, INPT; LCC, F-31077 Toulouse (France)
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  • Dr. Karine Philippot,

    1. Laboratoire de Chimie de Coordination; CNRS; LCC, 205 Route de Narbonne, 31077 Toulouse (France)
    2. Université de Toulouse, UPS, INPT; LCC, F-31077 Toulouse (France)
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  • Dr. Bruno Chaudret

    1. LPCNO; Laboratoire de Physique et Chimie de Nano-Objets du CNRS, 135, UMR 5215 INSA-CNRS-UPS, Institut National des Sciences Appliquées, 135 Avenue de Rangueil, 31077 Toulouse (France)
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Abstract

In this communication, we report the first synthesis of Pt NPs stabilized with NHC ligands and their investigation as catalysts in the chemoselective hydrogenation of nitroarenes. The results in catalysis show that by a proper choice of the NHC stabilizer and the adjustment of the NHC/metal ratio, these NHC-capped Pt NPs exhibit high levels of activity and selectivity in the hydrogenation reactions. In particular, Pt NPs stabilized with 2 equiv. of IPr carbene (PtIPr0.2) catalyze the chemoselective reduction of a series of functionalized nitroarenes under mild conditions (1 bar H2, 30 °C). This catalyst tolerates the presence of a range of functional groups including hydroxyl, benzyloxy, carbonyl and olefinic moeities as well as halogens.

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