Synthesis of Β-Nitrostyrene in Highly Hydrophilic Ionic Liquid Media

Abstract The condensation reaction of benzaldehyde with nitromethane that resulted in the formation of β-nitrostyrene was studied in ionic liquid media - (2-hydroxyethyl)ammonium carboxylates (formates, lactates, acetates) without application of any other catalyst. The dependence of product yield on the ionic liquid cation and anion structure, the polarity of the ionic liquid and the pseudo-pH value of the reaction medium was investigated. The highest yield of the condensation reaction product - β-nitrostyrene was achieved in (2-hydroxyethyl) ammonium formate medium

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An Improved Protocol for the Aldehyde Olefination Reaction Using (bmim) () as Reaction Medium

Journal of Chemistry ◽

10.1155/2013/439673 ◽

2013 ◽

Vol 2013 ◽

pp. 1-4 ◽

Cited By ~ 1

Author(s):

Vivek Srivastava

Keyword(s):

Ionic Liquid ◽

Reaction Time ◽

Catalytic System ◽

Good Yield ◽

Reaction Medium ◽

Liquid Media

[Ru(COD)Cl2]/CuCl2·2H2O/LiCl catalytic system works efficiently in ionic liquid media for aldehyde olefination reaction. It offers good yield and selectivity with the added advantage of 5 times recyclability for [Ru(COD)Cl2] /CuCl2·2H2O/LiCl catalytic system. We also successfully reduced the reaction time from 12 hours to 9 hours for the aldehyde olefination reaction.

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A Phosphine-mediated Synthesis of 2,3,4,5-tetra-substituted Nhydroxypyrroles from α-oximino Ketones and Dialkyl Acetylenedicarboxylates Under Ionic Liquid Green-media

Combinatorial Chemistry & High Throughput Screening ◽

10.2174/1386207321666180124094536 ◽

2018 ◽

Vol 21 (1) ◽

pp. 14-18

Author(s):

Ashraf S. Shahvelayati ◽

Maryam Ghazvini ◽

Khadijeh Yadollahzadeh ◽

Akram S. Delbari

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Organic Solvents ◽

Condensation Reaction ◽

Reaction Medium ◽

Sustainable Chemistry ◽

Polyfunctional Compounds ◽

High Yields ◽

Work Up ◽

Reaction Media

Background: The development of multicomponent reactions (MCRs) in the presence of task-specific ionic liquids (ILs), used not only as environmentally benign reaction media, but also as catalysts, is a new approach that meet with the requirements of sustainable chemistry. In recent years, the use of ionic liquids as a green media for organic synthesis has become a chief study area. This is due to their unique properties such as non-volatility, non-flammability, chemical and thermal stability, immiscibility with both organic compounds and water and recyclability. Ionic liquids are used as environmentally friendly solvents instead of hazardous organic solvents. Objective: We report the condensation reaction between α-oximinoketone and dialkyl acetylene dicarboxylate in the presence of triphenylphosphine to afford substituted pyrroles under ionic liquid conditions in good yields. Result: Densely functionalized pyrroles was easily prepared from reaction of α-oximinoketones, dialkyl acetylene dicarboxylate in the presence of triphenylphosphine in a quantitative yield under ionic liquid conditions at room temperature. Conclusion: In conclusion, ionic liquids are indicated as a useful and novel reaction medium for the selective synthesis of functionalized pyrroles. This reaction medium can replace the use of hazardous organic solvents. Easy work-up, synthesis of polyfunctional compounds, decreased reaction time, having easily available-recyclable ionic liquids, and good to high yields are advantages of present method.

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Metal-Catalyzed Degradation of Cellulose in Ionic Liquid Media

Inorganics ◽

10.3390/inorganics6030078 ◽

2018 ◽

Vol 6 (3) ◽

pp. 78 ◽

Cited By ~ 2

Author(s):

Tiina Aid ◽

Mihkel Koel ◽

Margus Lopp ◽

Merike Vaher

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Molybdenum Oxide ◽

Cellulose Degradation ◽

Biomass Conversion ◽

Reaction Medium ◽

Good Activity ◽

Industrial Chemicals ◽

Liquid Media ◽

Metal Catalyzed

Biomass conversion to 5-hydroxymethylfurfural (HMF) has been widely investigated as a sustainable alternative to petroleum-based feedstock, since it can be efficiently converted to fuel, plastic, polyester, and other industrial chemicals. In this report, the degradation of commercial cellulose, the isomerization of glucose to fructose, and the conversion of glucose to HMF in 1-butyl-3-methylimidazolium chloride ([BMIM]Cl]) using metal catalysts (CrCl3, ZnCl2, MgCl2) as well as tungsten and molybdenum oxide-based polyoxometalates (POM) were investigated. Tungsten and molybdenum oxide-based POMs in ionic liquids (IL) were able to degrade cellulose to majority glucose and epimerize glucose to mannose (in the case of the molybdenum oxide-based POM). A certain amount of glucose was also converted to HMF. The tungsten oxide-based POM in IL showed good activity for cellulose degradation but the overall products yield remained 28.6% lower than those obtained using CrCl3 as a catalyst. Lowering the cellulose loading did not significantly influence the results and the addition of water to the reaction medium decreased the product yields remarkably.

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Green preparation of quinoline derivatives through FeCl3·6H2O catalyzed Friedlander reaction in ionic liquids

Canadian Journal of Chemistry ◽

10.1139/v04-066 ◽

2004 ◽

Vol 82 (7) ◽

pp. 1192-1196 ◽

Cited By ~ 34

Author(s):

Jianji Wang ◽

Xuesen Fan ◽

Xinying Zhang ◽

Lijun Han

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Condensation Reaction ◽

Reaction Medium ◽

Iron Chloride ◽

Quinoline Derivatives ◽

Reaction Conditions ◽

Environmental Friendliness ◽

Operating Process ◽

Chloride Hexahydrate

The preparation of substituted quinoline derivatives through a Friedlander condensation reaction utilizing the ionic liquid [bmim][BF4] as the reaction medium and iron chloride hexahydrate (FeCl3·6H2O) as a catalyst is described. The advantages in using this method include its environmental friendliness, simple operating process in both mild and neutral reaction conditions, and good yields.Key words: ionic liquid, Friedlander reaction, quinoline derivatives, green chemistry.

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Electrochemical Determination of pKaof N-Bases in Ionic Liquid Media

The Journal of Physical Chemistry B ◽

10.1021/jp204949a ◽

2011 ◽

Vol 116 (1) ◽

pp. 277-282 ◽

Cited By ~ 46

Author(s):

Rachid Barhdadi ◽

Michel Troupel ◽

Clément Comminges ◽

Michel Laurent ◽

Andrew Doherty

Keyword(s):

Ionic Liquid ◽

Electrochemical Determination ◽

Liquid Media

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Lipase-Catalyzed Acyl-L-Carnitines Synthesis in [Bmim]PF6 Ionic Liquid

International Journal of Food Engineering ◽

10.2202/1556-3758.1631 ◽

2009 ◽

Vol 5 (1) ◽

Author(s):

Jin-qiang Tian ◽

Qiang Wang ◽

Zhong-yuan Zhang

Keyword(s):

Ionic Liquid ◽

Lipase Activity ◽

Molecular Sieves ◽

Reaction Medium ◽

Molar Ratio ◽

Reaction Conditions ◽

Optimal Reaction ◽

Better Than

In order to significantly improve the biosynthesis of acyl-L-carnitines catalyzed by lipase, there must be an efficient and suitable reaction medium that is not only polar but also hydrophobic. [Bmim]PF6, which satisfies the above two requirements, was applied as the medium. The optimal reaction conditions were: for isovaleryl-L-carnitine, 0.22aW, 200mg molecular sieves, 60ºC, 4:1 of molar ratio (fatty acid:L-carnitine), 150rpm and 60h; for octanoyl-L-carnitine and palmitoyl-L-carnitine, 0.22aW, 250 mg molecular sieves, 5:1 of molar ratio (fatty acid:L-carnitine), 200rpm, 48h, 60ºC (octanoyl-L-carnitine) and 65ºC (palmitoyl-L-carnitine). Their overall yields could reach 59.14%, 90.79% and 98.03%, respectively. The yields of isovaleryl-L-carnitine, octanoyl-L-carnitine and palmitoyl-L-carnitine in [Bmim]PF6 were 16.21%, 73.67% and 44.22 % more than those in acetonitrile, respectively. [Bmim]PF6 as the medium was better than acetonitrile. It could not only enhance the yields of acyl-L-carnitines, but also protect the lipase activity.

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