Formamides were efficiently synthesized from N-formylation of amines using CoFe2O4 nanoparticles as a magnetically
recoverable and reusable catalyst under ultrasound irradiation. The main advantages allocated to this method are
chemoselectivity, reduced reaction times, high yields, magnetically recyclable catalyst, non-solvent green conditions and
simple work-up procedure.
Keywords: N-formylation, amine, formic acid, sonochemistry, nano CoFe2O4.
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