The synthesis of polysubstituted pyridines using nano Fe3O4 supported hydrogensulfate ionic liquid

The synthesis of polysubstituted pyridines using nano Fe3O4 supported hydrogensulfate ionic liquid Reaction of 1-methylimidazole with 3-(trimethoxysilyl)propyl chloride resulted in formation of 1-methyl-3-(trimethoxysilyl)propyl imidazolium chloride ([pmim]Cl). Anchoring of the ionic liquid on to silica-coated magnetic Fe3O4 particles afforded the corresponding supported ionic liquid MNP-[pmim]Cl. Exchanging the Cl− anion by treatment with H2SO4 gave the Brønsted ionic liquid MNP-[pmim]HSO4. FT-IR, XRD, SEM, TEM, TG/DTG, VSM, and CHN analysis were used to characterize the supported ionic liquid. The results indicated the catalyst was a nanostructure. The catalytic activity of the supported ionic liquid was examined in the synthesis of the polysubstituted pyridines by reaction of aromatic aldehydes, and acetophenones or indan-1-one with ammonium acetate under solvent-free conditions. The catalyst could be easily recovered, by applying an external magnetic field, and reused at least six runs without deterioration of its catalytic activity. Research on Chemical Intermediates Springer Journals

The synthesis of polysubstituted pyridines using nano Fe3O4 supported hydrogensulfate ionic liquid

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Springer Netherlands
Copyright © 2015 by Springer Science+Business Media Dordrecht
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
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