Thermally decomposed mesoporous Nickel Iron hydrotalcite: An active solid-base catalyst for solvent-free Knoevenagel condensation

Deepa K. Dumbre, Tibra Mozammel, P. R. Selvakannan, Sharifah Bee Abdul Hamid, Vasant R. Choudhary, Suresh K. Bhargava

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    31 Scopus citations

    Abstract

    Thermal decomposition of co-precipitated NiFeHT materials led to the formation a mesoporous NiFeHT catalyst and we have demonstrated here its active role as solid and active catalyst for the Knoevenagel condensation reaction of various aldehydes with active methylene compounds (RCH2CN, where RCN or CO2Et). High product yields are obtained at moderate temperature under solvent-free conditions and the catalyst can be easily separated from the reaction mixture, simply by filtration and reused several times without a significant loss of its activity. Since these mesoporous metal oxides derived from the NiFe hydrotalcites, their basicity mediated abstraction of the acidic protons from the active methylene compounds was responsible for their catalytic activity under solvent-free conditions.

    Original languageBritish English
    Pages (from-to)52-58
    Number of pages7
    JournalJournal of Colloid and Interface Science
    Volume441
    DOIs
    StatePublished - 1 Mar 2015

    Keywords

    • Active methylene compounds
    • Aldehydes
    • Knoevenagel condensation
    • NiFeHT
    • Solvent-free reaction

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