Abstract
The ionic liquid 1-methyl-3-(3-trimethoxysilylpropyl)imidazolium chloride was immobilized on Fe3O4 nanoparticles and used as an efficient and reusable catalyst for the one-pot synthesis of 1,2,4,5-tetrasubstituted imidazoles at room temperature under ultrasonic irradiation. The immobilized ionic liquid catalysts proved to be effective and easily separated from the reaction media by applying an external magnetic field. This procedure has many obvious advantages compared to those reported in the previous literatures, including avoiding the use of harmful catalysts, reacting at room temperature, high yields, and simplicity of the methodology.
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Acknowledgments
We gratefully acknowledge the financial support from the Research Council of the University of Kashan for supporting this work by Grant No. 256722/I.
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Safari, J., Zarnegar, Z. Magnetic nanoparticle supported ionic liquid as novel and effective heterogeneous catalyst for synthesis of substituted imidazoles under ultrasonic irradiation. Monatsh Chem 144, 1389–1396 (2013). https://doi.org/10.1007/s00706-013-1015-6
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DOI: https://doi.org/10.1007/s00706-013-1015-6
Keywords
- Ionic liquid
- Imidazole
- 1-Methyl-3-(3-trimethoxysilylpropyl)imidazolium chloride
- Magnetic nanoparticles
- Ultrasonic irradiation