Thermally decomposed mesoporous Nickel Iron hydrotalcite: An active solid-base catalyst for solvent-free Knoevenagel condensation
Document Type
Article
Publication Date
1-1-2015
Abstract
Thermal decomposition of co-precipitated Ni-Fe-HT materials led to the formation a mesoporous Ni-Fe-HT 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 (R-CH2-CN, where R=CN 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. (C) 2014 Elsevier Inc. All rights reserved.
Keywords
Knoevenagel condensation, Solvent-free reaction, Aldehydes, Active methylene compounds, Ni-Fe-HT, Nickel Iron hydrotalcite, Solid-base catalyst
Divisions
CHEMISTRY
Publication Title
Journal of Colloid and Interface Science
Volume
441
Publisher
Elsevier
Publisher Location
525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA