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Swift and Selective Reduction of Nitroaromatics to Aromatic Amines with Ni–Boride–Silica Catalysts System at Low Temperature

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Abstract

Various nitroaromatics are successfully reduced to amines with 100% conversion and selectivity in methanol at low temperature (≈5 °C), by using versatile system of 5% Ni–SiO2 catalyst and NaBH4 and in situ generation of Ni boride. The catalytic efficiency of Ni loading (5%, 10% and 15%) with silica or titania as support materials is investigated for reduction of nitrobenzene. The Ni–titania/NaBH4 system recorded lower conversion and selectivity. The IR studies indicate that silica support does not have free –OH group on its surface. Thus the nickel boride is anchored to the silica to facilitate the catalytic process.

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Acknowledgments

Authors thank the National Research Foundation, Pretoria and the University of KwaZulu-Natal for financial support of this research.

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Authors and Affiliations

  1. School of Chemistry, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Private bag 54001, Durban, 4000, South Africa

    Ateeq Rahman & S. B. Jonnalagadda

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  1. Ateeq Rahman
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  2. S. B. Jonnalagadda
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Correspondence to S. B. Jonnalagadda.

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Rahman, A., Jonnalagadda, S.B. Swift and Selective Reduction of Nitroaromatics to Aromatic Amines with Ni–Boride–Silica Catalysts System at Low Temperature. Catal Lett 123, 264–268 (2008). https://doi.org/10.1007/s10562-008-9417-5

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  • DOI: https://doi.org/10.1007/s10562-008-9417-5

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