期刊
ULTRASONICS SONOCHEMISTRY
卷 22, 期 -, 页码 341-348出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2014.02.002
关键词
Ultrasound irradiation; Fe3O4 nanoparticles; Fe3O4-chitosan nanoparticles; 2-Amino-4H-chromene; Magnetic catalyst; Green catalyst
资金
- Research Council of the University of Kashan [256722/XIII]
Fe3O4 nanoparticles were prepared by chemical coprecipitation method. Subsequently immobilization of chitosan on Fe3O4 nanoparticles was accomplished and afforded magnetic Fe(3)o(4)-chitosan nanoparticles. Synthesized nanoparticles was found to be a magnetic and heterogeneous catalyst for a one-pot and efficient synthesis of 2-amino-4H-chromenes by condensation of aldehydes with malononitrile and resorcinol under ultrasound irradiation as an ecofriendly method. This convenient procedure allowed us to achieve products under ultrasound irradiation in short time and excellent yield without using of harmful catalyst. The present method will permit a further increase of the diversity within the 2-amino-4H-chromene family. (C) 2014 Elsevier B.V. All rights reserved.
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