Journal
COMPTES RENDUS CHIMIE
Volume 16, Issue 10, Pages 906-911Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crci.2013.01.003
Keywords
Magnetic catalysts; Polymer coated magnetic nanoparticles; Poly(ionic liquid); Bronsted base catalyst
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A novel poly(ionic liquid) (PIL) coated magnetic nanoparticle was synthesized by distillation-precipitation-polymerization of 1-vinyl-3- ethyl imidazolium in the presence of surface modified magnetic nanoparticles. The resulting catalyst was used as magnetic heterogeneous base catalyst for the synthesis of 4H-benzo[b]pyrans in water. The separation of the catalyst from the reaction mixture was readily achieved by simple magnetic decantation and the catalyst could be easily recycled without appreciable loss of catalytic activity. Because of polymer layers coated the surface of the magnetic nanoparticles, the catalyst has a high loading level of ionic liquid. (C) 2013 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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