A simple and efficient protocol for the formylation of amines with ammonium formate with excellent yields catalyzed by Fe3O4 nanoparticles in PEG-400 is described. Notably, this method shows excellent activity and chemoselectivity for the formylation of primary and secondary arylamines. Moreover, the nano-Fe3O4 catalyst and PEG-400 could be easily recovered and reused.
Z. Wang and M. Lu, RSC Adv., 2014, 4, 1234 DOI: 10.1039/C3RA43273D
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