Journal
SYNLETT
Volume 26, Issue 9, Pages 1263-1268Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0034-1380503
Keywords
Pechmann condensation; coumarin; magnetic particles; nanocomposites; sulfonic acid
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Funding
- Research Council of the K. N. Toosi University of Technology
- Iranian National Science Foundation (INSF) [92013520]
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An environmentally benign sulfonic acid nanocomposite based on Fe3O4@SiO2 core-shell magnetic nanoparticles, Fe3O4@SiO2@Et-PhSO3H, was prepared and the acidity and utility of the catalyst were explored for the synthesis of a diverse range of coumarin derivatives under solvent-free conditions. The catalyst shows potential for scale up in the synthesis of coumarins with high purity and was easily separated by using an external magnet. The recovered catalyst was reused in seven cycles without any significant loss of activity.
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