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Natural Moroccan clays: Comparative study of their application as recyclable catalysts in Knoevenagel condensation |
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| Authors: | Hanae Ouaddari Dounia Beqqour Jamal Bennazha Iz-Eddine El Amrani Abderrahman Albizane Abderrahim Solhy Rajender S. Varma |
| Affiliation: | 1. Laboratory of Materials Membranes and Environment, Department of Chemistry, Faculty of Sciences and Technologies of Mohammedia, University of Hassan II, Casablanca, Morocco;2. Chemistry platform, UATRS, Centre National pour la Recherche Scientifique & Technique (CNRST), Rabat, Morocco;3. Department of Earth Sciences, Geomaterials and Geo-Environment Team (Geo M&E), University Mohammed V Agdal, Scientific Institute, Rabat, Morocco;4. Mohamed VI Polytechnic University, Lot 660 - Hay Moulay Rachid., 43150 Ben Guerir, Morocco;5. Regional Centre of Advanced Technologies and Materials, Faculty of Science, Department of Physical Chemistry, Palacky University, ?lechtitel? 11, 783 71 Olomouc, Czech Republic |
| Abstract: | Natural Moroccan clay samples from different regions were purified via simple washing, activated and extensively analyzed by various characterization techniques. A comparative study of these clays as recyclable heterogeneous catalysts for the Knoevenagel condensation was undertaken in EtOH/water as solvent under mild conditions; high yield of the desired α,β-unsaturated products was obtained in a short reaction period (~ 30 min). The recyclable solid catalyst was effective for several runs indicating that these purified clays are potentially eco-friendly heterogeneous catalysts; assorted α,β-unsaturated carbonyl compounds were synthetized in high yields (~ 98%) at 40 °C. |
| Keywords: | Moroccan clays Heterogeneous catalysis Knoevenagel reaction Aqueous medium |
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