ChemInform Abstract: The First Ionic Liquid Promoted Kabbe Condensation Reaction for an Expeditious Synthesis of Privileged Bis-Spirochromanone Scaffolds.

ChemInform ◽  
2009 ◽  
Vol 40 (36) ◽  
Author(s):  
M. Muthukrishnan ◽  
U. M. V. Basavanag ◽  
Vedavati G. Puranik
Keyword(s):  
Ionic Liquid ◽  
Condensation Reaction ◽  
Kabbe Condensation

Ionic Liquid 4-(3-Methyl-1-imidazolio)-1-butanesulfonic Acid Hydrogen Sulfate-catalyzed Synthesis of Phthalazinetrione Derivatives

2012 ◽  
Vol 67 (7) ◽  
pp. 717-724
Author(s):  
Shihua Song ◽  
Xiang Deng ◽  
Zhi Guan ◽  
Yanhong He
Keyword(s):  
Ionic Liquid ◽  
Polyethylene Glycol ◽  
Condensation Reaction ◽  
Reaction Times ◽  
Solvent System ◽  
Environmentally Benign ◽  
Hydrogen Sulfate ◽  
One Pot ◽  
Simple Method ◽  
Peg 600

A simple method for the synthesis of phthalazinetrione derivatives by a one-pot three-component condensation reaction of phthalhydrazide, 1,3-dicarbonyl compounds and aldehydes catalyzed by the ionic liquid 4-(3-methyl-1-imidazolio)-1-butanesulfonic acid hydrogen sulfate ([BSO3HmIm]HSO4) is reported. Good to excellent yields were obtained in short reaction times in the solvent PEG 600 (polyethylene glycol 600) at 120 °C. The strategy proved to be efficient and environmentally benign. The catalyst/solvent system could easily be recovered and reused for at least 5 times without noticeable loss of activity

First Application of Ionic Liquid to Reactions Involving Organotellurium Compounds as Intermediates

2005 ◽  
Vol 2005 (7) ◽  
pp. 446-448 ◽  
Author(s):  
Lei Wang ◽  
Zhizhen Huang
Keyword(s):  
Ionic Liquid ◽  
High Purity ◽  
Stereoselective Synthesis ◽  
Condensation Reaction ◽  
Unsaturated Compounds ◽  
Novel Method ◽  
Ionic Solvent ◽  
Organotellurium Compounds ◽  
High Stereoselectivity

The condensation reaction of telluronium salts 1 with aldehydes and dibutyl telluride 4, bromide 5 with aldehyde 2 proceeded smoothly in the ionic solvent [bmim][BF4], affording a novel method for the stereoselective synthesis of (E)-α,β-unsaturated compounds 3 in high purity, excellent yields and high stereoselectivity.

One-Pot Syntheses of 2H-Indazolo[2,1-B] Phthalazine-Triones Catalyzed by Ionic Iiquid

2011 ◽  
Vol 332-334 ◽  
pp. 1884-1887
Author(s):  
Fang Yang ◽  
Hong Jun Zang ◽  
Qing Kai Wang ◽  
Bo Wen Cheng ◽  
Yuan Lin Ren ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Condensation Reaction ◽  
Aromatic Aldehydes ◽  
One Pot

A simple and efficient one-pot method for the preparation of 2H-indazolo [2,1-b] phthalazine-triones from phthalhydrazide, dimedone and aromatic aldehydes has been developed using ionic liquids as catalysts. Two ionic liquid catalysts are described, and the ionic liquid [(CH2)4SO3HMIM]HSO4 catalyst is found to be more effective than [HMIM]HSO4 for this condensation reaction.

Proton-exchange membranes with enhanced anhydrous proton conductivity by room temperature ionic liquid anchored to silica

2017 ◽  
Vol 10 (02) ◽  
pp. 1650075 ◽  
Author(s):  
Pai Peng ◽  
Rong Qu ◽  
Jie Liu ◽  
Jing Xu ◽  
Dongzhi Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Proton Conductivity ◽  
Room Temperature ◽  
Condensation Reaction ◽  
Proton Exchange Membranes ◽  
Room Temperature Ionic Liquid ◽  
Proton Exchange ◽  
Ionic Exchange ◽  
Poly Ether Ether Ketone ◽  
Solution Casting Method

A strategy of immobilizing room temperature ionic liquid (RTIL) in proton-exchange membranes (PEMs) is demonstrated for the first time. After synthesized by ionic exchange and extraction, RTIL is anchored to the surfaces of silica nanoparticles (SiO2-RTIL) via condensation reaction. Then composite PEMs consisting of sulfonated poly(ether ether ketone) (SPEEK) and silica with RTIL are prepared through the solution casting method. The incorporation of SiO2-RTIL markedly improves the physical properties of the composite PEMs as compared to the plain SPEEK membrane, which was probably related to the plasticization and additional proton conductivity of the SiO2-RTIL. The anhydrous proton conductivity of the resultant composite PEM with 30% SiO2-RTIL was 50 times that of the plain membrane at 150[Formula: see text]C.

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

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.

Synthesis of 2-arylbenzimidazoles under mild conditions catalyzed by a heteropolyacid-containing task-specific ionic liquid and catalyst investigation by electrospray (tandem) mass spectrometry

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69418-69422 ◽  
Author(s):  
Haline G. O. Alvim ◽  
Heibbe C. B. de Oliveira ◽  
Giovana A. Bataglion ◽  
Marcos N. Eberlin ◽  
Luciana M. Ramos ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Ionic Liquid ◽  
Tandem Mass Spectrometry ◽  
Condensation Reaction ◽  
Tandem Mass ◽  
Hydrogen Sulfate ◽  
Electrospray Tandem Mass Spectrometry ◽  
Mild Conditions ◽  
Brönsted Acid ◽  
Task Specific Ionic Liquid

A task-specific ionic liquid constituted by a Bronsted acid (1-(3-sulfopropyl)-3-methyl-imidazolium hydrogen sulfate), namely MSI, and by [PW12O40]3−, namely PW, was used for the condensation reaction in the synthesis of 2-arylbenzimidazoles.

Synthesis of Β-Nitrostyrene in Highly Hydrophilic Ionic Liquid Media

2014 ◽  
Vol 52 (1-2) ◽  
pp. 49-53
Author(s):  
S. Pavlovica ◽  
A. Gaidule ◽  
A. Zicmanis
Keyword(s):  
Ionic Liquid ◽  
Ph Value ◽  
Condensation Reaction ◽  
Reaction Medium ◽  
Product Yield ◽  
Ammonium Formate ◽  
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

1,3-Dialkylimidazolium Dimethyl Phosphates – Effective Solvents and Catalysts for Condensation Reactions

2014 ◽  
Vol 52 (1-2) ◽  
pp. 41-48
Author(s):  
L. Anteina ◽  
A. Gaidule ◽  
A. Zicmanis
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Malonic Acid ◽  
Condensation Reaction ◽  
Ethyl Cyanoacetate ◽  
Liquid Structure ◽  
Reaction Rates ◽  
Condensation Reactions

Abstract We report the preparation, characterization and exploitation of 1,3-dialkylimidazolium dimethyl phosphates. Condensation reactions of benzaldehyde with ethyl cyanoacetate and with malonic acid were performed in these ionic liquids either in absence or in presence of other catalysts. The effect of ionic liquid structure on the condensation reaction rates and yields was discussed

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