FeCl3•6H2O Catalysed Condensation of Aldehydes and Ketones in Ionic Liquid: A Novel Green Synthesis of Chalcones

2003 ◽  
Vol 2003 (1) ◽  
pp. 33-35 ◽  
Author(s):  
Xinying Zhang ◽  
Hongying Niu ◽  
Jianji Wang
Keyword(s):  
Ionic Liquid ◽  
Green Synthesis ◽  
Green Process ◽  
Reaction Conditions ◽  
Chloride Hexahydrate ◽  
Aldehydes And Ketones ◽  
First Time

Using iron(III) chloride hexahydrate as a catalyst, chalcones were efficiently prepared from acetophenone and benzaldehyde in ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate) for the first time. Compared with the known methods, this novel access to chalcones has the advantage of being a green process together with good yields and mild reaction conditions.

A solvent-free protocol for the green synthesis of arylalkylidene rhodanines in a task-specific ionic liquid

2010 ◽  
Vol 88 (6) ◽  
pp. 514-518 ◽  
Author(s):  
Abdolhamid Alizadeh ◽  
Mohammad M. Khodaei ◽  
Ali Eshghi
Keyword(s):  
Ionic Liquid ◽  
Green Synthesis ◽  
Carbonyl Compounds ◽  
Catalytic Effect ◽  
Knoevenagel Condensation ◽  
Solvent Free ◽  
Detailed Mechanism ◽  
Solvent Free Conditions ◽  
First Time ◽  
Task Specific Ionic Liquid

2-Hydroxyethylammonium formate acts as a task-specific ionic liquid (TSIL) for the Knoevenagel condensation of carbonyl compounds with rhodanine to afford arylalkylidene rhodanines under solvent-free conditions and in good-to-excellent yields. Additionally, compared with those in organic solvents, the yields obtained in the presence of our ionic liquid (IL) were significantly increased. The detailed mechanism of the catalytic effect of TSIL is also reported for the first time.

A novel and green version of the Passerini reaction in an ionic liquid ([bmim][BF4])

2006 ◽  
Vol 84 (5) ◽  
pp. 794-799 ◽  
Author(s):  
Xuesen Fan ◽  
Yanzhen Li ◽  
Xinying Zhang ◽  
Guirong Qu ◽  
Jianji Wang
Keyword(s):  
Ionic Liquid ◽  
Carboxylic Acid ◽  
Green Synthesis ◽  
High Efficiency ◽  
Passerini Reaction ◽  
Operational Procedure ◽  
First Time

The Passerini three-component condensation among a carboxylic acid (1), an aldehyde or ketone (2), and an isocyanide (3) was carried out for the first time in an ionic liquid, [bmim][BF4], and a series of acyloxycarboxamides were obtained through this reaction. The method presented herein has the advantages of high efficiency, a greener nature, and a simple operational procedure. Moreover, the ionic liquid can be easily recovered and reused for several runs without obvious loss of efficiency.Key words: Passerini reaction, acyloxycarboxamides, ionic liquid, green synthesis.

Facile and green synthesis of graphene oxide by electrical exfoliation of pencil graphite and gold nanoparticle for non-enzymatic simultaneous sensing of ascorbic acid, dopamine and uric acid

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63513-63520 ◽  
Author(s):  
Habibulla Imran ◽  
Palinci Nagarajan Manikandan ◽  
Venkataraman Dharuman
Keyword(s):  
Ascorbic Acid ◽  
Ionic Liquid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Green Synthesis ◽  
Gold Nanoparticle ◽  
Phosphate Buffer ◽  
Au Nanoparticles ◽  
First Time ◽  
Simultaneous Sensing

Pencil graphite is electrochemically exfoliated to gain few layered graphene oxide in HCl, NaOH and phosphate buffer saline without ionic liquid for the first time and used for simultaneous sensing of dopamine, ascorbic acid and uric acid in the presence of Au nanoparticles.

scholarly journals Alkaline Ionic Liquid Modified Pd/C Catalyst as an Efficient Catalyst for Oxidation of 5-Hydroxymethylfurfural

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Zou Bin ◽  
Chen Xueshan ◽  
Xia Jiaojiao ◽  
Zhou Cunshan
Keyword(s):  
Ionic Liquid ◽  
Polar Compounds ◽  
Temperature Reaction ◽  
Green Process ◽  
Reaction Conditions ◽  
Efficient Catalyst ◽  
Ft Ir ◽  
Redox Stability ◽  
Hydrophilicity And Hydrophobicity ◽  
Optimal Reaction

Conversion of HMF into FDCA was carried out by a simple and green process based on alkaline ionic liquid (IL) modified Pd/C catalyst (Pd/C-OH−). Alkaline ionic liquids were chosen to optimize Pd/C catalyst for special hydrophilicity and hydrophobicity, redox stability, and unique dissolving abilities for polar compounds. The Pd/C-OH− catalyst was successfully prepared and characterized by SEM, XRD, TG, FT-IR, and CO2-TPD technologies. Loading of alkaline ionic liquid on the surface of Pd/C was 2.54 mmol·g−1. The catalyst showed excellent catalytic activity in the HMF oxidation after optimization of reaction temperature, reaction time, catalyst amount, and solvent. Supported alkaline ionic liquid (IL) could be a substitute and promotion for homogeneous base (NaOH). Under optimal reaction conditions, high HMF conversion of 100% and FDCA yield of 82.39% were achieved over Pd/C-OH− catalyst in water at 373 K for 24 h.

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

2004 ◽  
Vol 82 (7) ◽  
pp. 1192-1196 ◽  
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.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Green Synthesis and Spectroscopic Studies of Ag-rGO Nanocomposites for Highly Selective Mercury (II) Sensing

2018 ◽  
Vol 9 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Shubhangi J. Mane-Gavade ◽  
Sandip R. Sabale ◽  
Xiao-Ying Yu ◽  
Gurunath H. Nikam ◽  
Bhaskar V. Tamhankar
Keyword(s):  
Green Synthesis ◽  
Color Change ◽  
Limit Of Detection ◽  
Aqueous Media ◽  
Suitable Condition ◽  
Cost Effective ◽  
Spectroscopic Studies ◽  
Calibration Plot ◽  
First Time

Introduction: Herein we report the green synthesis and characterization of silverreduced graphene oxide nanocomposites (Ag-rGO) using Acacia nilotica gum for the first time. Experimental: We demonstrate the Hg2+ ions sensing ability of the Ag-rGO nanocomposites form aqueous medium. The developed colorimetric sensor method is simple, fast and selective for the detection of Hg2+ ions in aqueous media in presence of other associated ions. A significant color change was noticed with naked eye upon Hg2+ addition. The color change was not observed for cations including Sr2+, Ni2+, Cd2+, Pb2+, Mg2+, Ca2+, Fe2+, Ba2+ and Mn2+indicating that only Hg2+ shows a strong interaction with Ag-rGO nanocomposites. Under the most suitable condition, the calibration plot (A0-A) against concentration of Hg2+ was linear in the range of 0.1-1.0 ppm with a correlation coefficient (R2) value 0.9998. Results & Conclusion The concentration of Hg2+ was quantitatively determined with the Limit of Detection (LOD) of 0.85 ppm. Also, this method shows excellent selectivity towards Hg2+ over nine other cations tested. Moreover, the method offers a new cost effective, rapid and simple approach for the detection of Hg2+ in water samples.

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