Brønsted-acidic ionic liquid: green protocol for synthesis of novel tetrasubstituted imidazole derivatives under microwave irradiation via multicomponent strategy

Brønsted-acidic ionic liquid: green protocol for synthesis of novel tetrasubstituted imidazole... Conventional Method: Reflux in Ethanol (68-75% in 14-15 h) CH COONH 3 4 Ar Ar N + N BF 3 15 mmol % NH [BMIM] [BF ] 5(a-k) Green Method MW at 240 W Solvent Free (84-89% in10-12 min) Keywords 1,3-Diphenyl-1H-pyrazole-4-carbaldehyde  Microwave irradiation Solvent free  Imidazole  [BMIM][BF ] Abbreviations MW Microwave ILs Ionic liquids NR No reaction p-TSA p-Toluene sulfonic acid [BMIM][BF ] 1-Butyl-3-methyl-1-imidazolium tetrafluoroborate Introduction Ionic liquids (ILs) enable excellent and environmentally benign techniques for synthetic chemistry. ILs have been used as effective reaction media for a wide range of organic transformations and other applications [1–5]. ILs are salts that exist in liquid form, hence being used as catalysts as well as solvents in organic transformations [6]. ILs possess many important properties such as thermal and chemical stability, low vapor pressure, ability to act as catalysts, nonflammability, and noncorrosive nature. These properties of ILs minimize hazards and solvent loss 123 Brønsted-acidic ionic liquid: green protocol for… 1091 to atmosphere. ILs are polar in nature, making them useful to carry out solvent-free reactions [7]. Literature survey reveals that ILs are used in diverse organic transformations. Some important example ILs include 3-methyl-1-(4-sulfonic acid)-butylimida- zolium hydrogen sulfate ([(CH http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Brønsted-acidic ionic liquid: green protocol for synthesis of novel tetrasubstituted imidazole derivatives under microwave irradiation via multicomponent strategy

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Publisher
Springer Journals
Copyright
Copyright © 2016 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-016-2684-7
Publisher site
See Article on Publisher Site

Abstract

Conventional Method: Reflux in Ethanol (68-75% in 14-15 h) CH COONH 3 4 Ar Ar N + N BF 3 15 mmol % NH [BMIM] [BF ] 5(a-k) Green Method MW at 240 W Solvent Free (84-89% in10-12 min) Keywords 1,3-Diphenyl-1H-pyrazole-4-carbaldehyde  Microwave irradiation Solvent free  Imidazole  [BMIM][BF ] Abbreviations MW Microwave ILs Ionic liquids NR No reaction p-TSA p-Toluene sulfonic acid [BMIM][BF ] 1-Butyl-3-methyl-1-imidazolium tetrafluoroborate Introduction Ionic liquids (ILs) enable excellent and environmentally benign techniques for synthetic chemistry. ILs have been used as effective reaction media for a wide range of organic transformations and other applications [1–5]. ILs are salts that exist in liquid form, hence being used as catalysts as well as solvents in organic transformations [6]. ILs possess many important properties such as thermal and chemical stability, low vapor pressure, ability to act as catalysts, nonflammability, and noncorrosive nature. These properties of ILs minimize hazards and solvent loss 123 Brønsted-acidic ionic liquid: green protocol for… 1091 to atmosphere. ILs are polar in nature, making them useful to carry out solvent-free reactions [7]. Literature survey reveals that ILs are used in diverse organic transformations. Some important example ILs include 3-methyl-1-(4-sulfonic acid)-butylimida- zolium hydrogen sulfate ([(CH

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Aug 18, 2016

References

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