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Catalysis Letters

, Volume 84, Issue 3–4, pp 201–204 | Cite as

Sonocatalysis and Basic Clays. Michael Addition Between Imidazole and Ethyl Acrylate

  • R.M. Martín-Aranda
  • E. Ortega-Cantero
  • M.L. Rojas-Cervantes
  • M.A. Vicente-Rodríguez
  • M.A. Bañares-Muñoz
Article

Abstract

Under ultrasound activation, imidazole was condensed with ethyl acrylate using two basic clays (Li+ and Cs+ montmorillonites). The clay catalysts were characterized by chemical analyses, nitrogen adsorption isotherms, and X-ray diffraction. Under sonochemical conditions N-substituted imidazole can be obtained with a high activity and selectivity. The conversion increases with the basicity of the clays and the ultrasonic exposition time. The yield presents a maximum for 0.1 g of Cs+ montmorillonite after 60 min of sonication.

Michael addition clay catalysts ultrasound activation N-substituted imidazole 

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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • R.M. Martín-Aranda
    • 1
  • E. Ortega-Cantero
    • 1
  • M.L. Rojas-Cervantes
    • 1
  • M.A. Vicente-Rodríguez
    • 2
  • M.A. Bañares-Muñoz
    • 2
  1. 1.Dpto. de Química Inorgánica y Química TécnicaUniversidad Nacional de Educación a Distancia (UNED)MadridSpain
  2. 2.Dpto. de Química Inorgánica, Facultad de Ciencias QuímicasUniversidad de SalamancaSalamancaSpain

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