Chitosan-coated Fe 3 O 4 nanoparticles (Fe 3 O 4 @CS) were prepared simply through in situ co-precipitation of Fe 2+ and Fe 3+ ions via NH 4 OH in an aqueous solution of chitosan and their catalytic activity was investigated in the synthesis of 2,4,5-trisubstituted imidazoles by a one-pot condensation of benzil derivatives, aryl aldehydes and ammonium acetate in EtOH.
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Zarnegar et al. (2014) studied this question.
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