Pyridinium based ionic liquids as promoters for a green and selective synthesis of N-monomethylanilines
الموضوعات : Iranian Journal of CatalysisPranab Jyoti Das 1 , Dimpee Das 2
1 - Department of Chemistry, Gauhati University, Guwahati 781014, India.
2 - Department of Chemistry, Gauhati University, Guwahati 781014, India.
الکلمات المفتاحية: Solvent-free reaction, Dimethylcarbonate, Pyridinium ionic liquids, Anilines, N-monomethylanilines,
ملخص المقالة :
Pyridinium based ionic liquids derived from β-picoline and n-alkylbromides were synthesized by a simple procedure at ambient temperature and then characterized. These neutral ionic liquids were investigated for their dual role as the solvent and promoter for the selective synthesis of a series of N-monomethylanilines using dimethylcarbonate as the methylating agent. A solvent free green procedure was developed. Reaction conditions were mild and the product recovery was simple. Excellent selectivity for N-monomethylation, the high yield of the product and recyclability of the ionic liquids are some of the promising features of this protocol.
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