Synthesis of Fe3O4 Nanoparticles Bound with Polyethylene Glycol Substituted 1-Methyl Imidazolium Bromide and Their Application as Nanomagnetic and Recyclable Phase-transfer Catalysts for the Green and Efficient Synthesis of 4H-pyrans

Faranak         Najafi; Mehdi         Fallah-Mehrjardi

Letters in Organic Chemistry

Author(s): Faranak Najafi and Mehdi Fallah-Mehrjardi*

DOI: 10.2174/1570178615666180126155640

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Synthesis of Fe3O4 Nanoparticles Bound with Polyethylene Glycol Substituted 1-Methyl Imidazolium Bromide and Their Application as Nanomagnetic and Recyclable Phase-transfer Catalysts for the Green and Efficient Synthesis of 4H-pyrans

Page: [778 - 786] Pages: 9

* (Excluding Mailing and Handling)

Abstract

Immobilization of polyethylene glycol substituted 1-methylimidazolium bromide on the surface of Fe3O4 magnetic nanoparticles led to the synthesis of powerful and recyclable heterogeneous phase-transfer catalysts which were successfully used for the one-pot three-component condensation of aryl aldehydes, malononitrile and 1,3-dicarbonyl compounds, to afford the corresponding 2-amino-3- cyano-4H-pyrans. The catalysts can be readily recovered by simple magnetic decantation, and they can be reused several times with no considerable loss in their activity.

Keywords: Phase-transfer catalysis, magnetic nanoparticles, Fe3O4-PEG-ImBr, one-pot synthesis, 2-Amino-3-cyano-4Hpyrans, green chemistry.

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