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South African Journal of Chemistry
On-line version ISSN 1996-840X
Print version ISSN 0379-4350
Abstract
ZOLFIGOL, Mohammad Ali et al. Nano-Fe3O4/O2: Green, magnetic and reusable catalytic system for the synthesis of benzimidazoles. S.Afr.j.chem. (Online) [online]. 2012, vol.65, pp.280-285. ISSN 1996-840X.
Magnetic nano-Fe3O4 was applied in the presence of atmospheric air as a green, efficient, heterogeneous and reusable catalytic system for the synthesis of benzimidazoles via the reactions of o-phenylenediamine (1 eq) with aryl aldehydes (1 eq) in excellent yields (85-97 %) and short reaction times (30-100 min) with a proposed mechanism.
Keywords : Benzimidazole; benzene-1; 2-diamine; aldehyde; nano-Fe3O4; heterogeneous catalyst; magnetite; O2.