Journal
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume 65, Issue 5, Pages 523-530Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.201700401
Keywords
Phase-transfer catalyst; -Fe2O3@HAp@PEG(mim)OH; Nanomagnetic basic catalyst; Tetrahydrobenzopyrans; Green chemistry
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Funding
- Research Council of Payame Noor University
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Polyethylene glycol-(N-methylimidazolium) hydroxide-grafted hydroxyapatite encapsulated -Fe2O3 nanoparticles, -Fe2O3@HAp@PEG(mim)OH, were prepared and characterized by FTIR, SEM, TEM, TGA, and EDAX. This nanocomposite was applied as a novel, green, nanomagnetic, and recyclable basic phase-transfer catalyst for the synthesis of tetrahydrobenzopyrans in high yields via the three-component reaction of aromatic aldehydes, malononitrile, and dimedone or 1,3-cyclohexanedione in aqueous media at ambient temperature.
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