Reaction Kinetics, Mechanisms and Catalysis

, Volume 124, Issue 2, pp 757–766 | Cite as

Fe3O4 magnetic nanoparticles coated with a copolymer: a novel reusable catalyst for one-pot three-component synthesis of 2-amino-4H-chromene

  • Mahdieh Keshavarz
  • Masumeh Abdoli-SenejaniEmail author
  • Seyedeh Fatemeh Hojati
  • Shivadokht Askari


In this paper, an efficient method for the synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromene derivatives is described. The method uses Fe3O4 magnetic nanoparticles coated with poly (ε-caprolactone)/poly (ethylene glycol)/poly (ε-caprolactone) (MNPs-Fe3O4/PCL–PEG–PCL) as a biodegradable and green catalyst under solvent-free conditions. The catalyst was prepared from PCL–PEG–PCL copolymer and MNPs-Fe3O4 and characterized by FT-IR, X-ray diffraction and SEM spectroscopy. Most aromatic aldehydes bearing electron-withdrawing or electron donating groups reacted successfully with malononitrile and dimedone under solvent-free conditions at 80 °C. The corresponding chromenes were isolated in good to excellent yields and the structures of them were confirmed by 1H NMR and IR spectroscopy. The catalyst could be recovered using an external magnet without a considerable loss in its catalytic activity. Moreover, some advantages of this method are simplicity of procedure, easy separation of the catalyst, high yields, efficiency, stability and non-toxicity of the catalyst, short reaction times, and environmentally benign conditions.


2-Amino-4H-chromene Magnetic nanoparticles Solvent-free condition One-pot synthesis PCL–PEG–PCL 



We are thankful to the Islamic Azad University Arak-Branch for its financial support.

Supplementary material

11144_2018_1361_MOESM1_ESM.docx (30 kb)
Supplementary material 1 (DOCX 29 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Mahdieh Keshavarz
    • 1
  • Masumeh Abdoli-Senejani
    • 1
    Email author
  • Seyedeh Fatemeh Hojati
    • 2
  • Shivadokht Askari
    • 3
  1. 1.Department of Chemistry, Arak BranchIslamic Azad UniversityArakIran
  2. 2.Department of Chemistry, Faculty of ScienceHakim Sabzevari UniversitySabzevarIran
  3. 3.Department of Medical Biotechnology, Faculty of Advanced Medical SciencesTabriz University of Medical SciencesTabrizIran

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