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Cross-linked basic nanogel; robust heterogeneous organocalayst

Pourjavadi, A ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.cej.2013.07.090
  3. Publisher: 2013
  4. Abstract:
  5. A novel basic poly(ionic liquid) (PIL) was synthesized by miniemulsion polymerization of ionic liquid monomer 1-ethyl-3-vinylimidazolium bromide [EVim][Br] which was cross-linked by ionic liquid cross-linker 1,4-butanediyl-3,3'-bis-l-vinylimidazolium dibromide (BVD). Exchange of bromide anions in PIL nanogel with hydroxide, produced a supported basic ionic liquid catalyst. The catalytic performances of PIL nanogel with a size of about 200. nm was evaluated in the synthesis of 4. H-benzo[. b]pyrans by multi-component reaction in water. The present protocol represents a simple, ecologically safe and cost-effective route to synthesize 4. H-benzo[. b]pyrans with high products yield
  6. Keywords:
  7. 4H-benzo[b]pyrans ; Green chemistry ; Organocatalyst ; Poly(ionic liquid) ; Catalytic performance ; Ionic liquid monomers ; Mini-emulsion polymerization ; Multi-component reactions ; Organocatalysts ; Poly(ionic liquid)s ; Nanostructured materials ; Ionic liquids
  8. Source: Chemical Engineering Journal ; Volume 232 , 2013 , Pages 453-457 ; 13858947 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1385894713009972