Tuning the chemoselective hydrogenation of aromatic ketones, aromatic aldehydes and quinolines catalyzed by phosphine functionalized ionic liquid stabilized ruthenium nanoparticles

2015 ◽  
Vol 5 (7) ◽  
pp. 3728-3734 ◽  
Author(s):  
He-yan Jiang ◽  
Xu-xu Zheng
Keyword(s):  
Ionic Liquid ◽  
Aromatic Aldehydes ◽  
Ruthenium Nanoparticles ◽  
Aromatic Ketones ◽  
Functionalized Ionic Liquid ◽  
Mild Conditions ◽  
Chemoselective Hydrogenation

Aromatic ketones, aromatic aldehydes and quinolines can be hydrogenated with switchable excellent chemoselectivity under mild conditions catalyzed by ruthenium nanoparticles.

Efficient palladium and ruthenium nanocatalysts stabilized by phosphine functionalized ionic liquid for selective hydrogenation

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34622-34629 ◽  
Author(s):  
Zhifeng Wu ◽  
Heyan Jiang
Keyword(s):  
Ionic Liquid ◽  
Selective Hydrogenation ◽  
Ruthenium Nanoparticles ◽  
Functionalized Ionic Liquid ◽  
Chemoselective Hydrogenation

Palladium and ruthenium nanoparticles stabilized by novel phosphine functionalized ionic liquid are originally utilized as efficient catalysts for excellent chemoselective hydrogenation.

scholarly journals Low Temperature Chemoselective Hydrogenation of Aldehydes over a Magnetic Pd Catalyst

2019 ◽  
Vol 9 (9) ◽  
pp. 1792
Author(s):  
Liu ◽  
Wang ◽  
Gao ◽  
Wang ◽  
Cheng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Heterogeneous Catalysts ◽  
Aromatic Aldehydes ◽  
Pd Catalyst ◽  
Primary Alcohols ◽  
Mild Conditions ◽  
Excellent Yield ◽  
Chemoselective Hydrogenation ◽  
Supported Palladium

Chemoselective hydrogenation of aldehydes with heterogeneous catalysts under mild conditions is of great importance but remains a major challenge. Herein, an efficient strategy was developed for low temperature chemoselective hydrogenation of aldehydes with broad substrate scope over a magnetic material supported palladium catalyst (γ-Fe2O3@HAP-Pd). Aldehydes bearing various reducible functional groups readily underwent hydrogenation to give the corresponding primary alcohols with moderate to excellent yield at room temperature in aqueous solutions. The Hammett equation revealed that the hydrogenation of aromatic aldehydes proceeded via an anionic intermediate. Additionally, when the temperature increased to 70 °C, toluene was obtained by the deoxygenation of benzaldehyde in excellent yield. Furthermore, the γ-Fe2O3@HAP-Pd could be recycled up to six times without loss of activity and metal leaching.

Choline taurinate: a new biocompatible amino-functionalized ionic liquid as basic catalyst and extraction solvent

2018 ◽  
Vol 7 (3) ◽  
pp. 191-197 ◽  
Author(s):  
Wenxiu Deng ◽  
Lujie Liu ◽  
Yanqing Peng
Keyword(s):  
Ionic Liquid ◽  
Aromatic Aldehydes ◽  
Extraction Process ◽  
Significant Loss ◽  
Test Reaction ◽  
Base Interaction ◽  
Functionalized Ionic Liquid ◽  
Extraction Solvent ◽  
Basic Ionic Liquid ◽  
Vis Spectroscopy

Abstract A new biocompatible amino-functionalized ionic liquid composed solely of biomaterials was synthesized from taurine and choline hydroxide, and its physical properties (density, viscosity, miscibility and thermal stability) were also determined. The classic base-promoted three-component cyclic condensation of aromatic aldehydes, malononitrile and dimedone was chosen as the test reaction to demonstrate the catalytic activity of choline taurinate ([Ch][Tau]). The catalyst could be recovered and reused several times with no significant loss of activity. As a basic ionic liquid, [Ch][Tau] can extract acidic compounds from immiscible solvents through acid-base interaction. The extraction process of fluorescent dye Rhodamine B was monitored using ultraviolet-visible (UV-Vis) spectroscopy, by which the percentage extraction rate was determined as 95%.

Efficient Construction of 4-hydroxy-4-arylbutan-2-ones through an Enantioselective Aldol Reaction Mediated by a Recoverable Proline-Based Chiral Ionic Liquid

2020 ◽  
Vol 42 (2) ◽  
pp. 243-243
Author(s):  
Dao Cai Wang Dao Cai Wang ◽  
Cong Wu Cong Wu ◽  
Chi Zhang Chi Zhang ◽  
Fang Zhen Zhou Fang Zhen Zhou ◽  
Hang Song and Xiao Peng Liu Hang Song and Xiao Peng Liu
Keyword(s):  
Ionic Liquid ◽  
Column Chromatography ◽  
Aldol Reaction ◽  
Reaction Medium ◽  
Aromatic Aldehydes ◽  
Catalytic Method ◽  
Mild Conditions ◽  
Satisfactory Performance ◽  
Efficient Construction ◽  
Chiral Ionic Liquid

Chiral ionic liquid derived from L-proline worked as an excellent organocatalyst for the enantioselective aldol reaction of aromatic aldehydes and acetone. The reaction was conducted in the presence of [BMIM][BF4] as reaction medium. The substrate scope of aldol reaction was successfully explored for various aromatic aldehydes under the mild conditions. The generated aldol products were separated by column chromatography with moderate to good yields as well as enantioselectivities. The main advantage of this catalytic method was that the catalyst and solvent could be recovered at the same time and reused for at least five times with satisfactory performance.

1, 1’-Sulfinyldiethylammonium Bis (Hydrogen Sulfate) as a Recyclable Dicationic Ionic Liquid Catalyst for the Efficient Solvent-free Synthesis of 3, 4-Dihydropyrimidin-2(1H)-ones via Biginelli Reaction

2020 ◽  
Vol 23 (2) ◽  
pp. 157-167
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Biginelli Reaction ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Hydrogen Sulfate ◽  
One Pot ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Solvent Free Conditions ◽  
Dicationic Ionic Liquid

Objective: A facile and efficient method for synthesis of 3, 4-dihydropyrimidin-2(1H)-ones via Biginelli reaction catalyzed by a novel dicationic Brönsted acidic ionic liquid, [(EtNH2)2SO][HSO4]2, has been successfully developed. Material and Method:: 3, 4-Dihydropyrimidin-2(1H)-ones were synthesized through one-pot condensation of aromatic aldehydes, ethyl acetoacetate, and urea under solvent-free conditions using [(EtNH2)2SO][HSO4]2 as a novel catalyst. The progress of the reaction was monitored by thin-layer chromatography (ethyl acetate / n-hexane = 1 / 5). The products have been characterized by IR, 1H NMR, 13C NMR, and also by their melting points. Results: In this research, a library of dihydropyrimidinone derivatives was synthesized via Biginelli reaction under solvent-free conditions at 120oC using [(EtNH2)2SO][HSO4]2 as a catalyst. Various aromatic aldehydes, as well as heteroaromatic aldehydes, were employed, affording good to high yields of the corresponding products and illustrating the substrate generality of the present method. In addition, the prepared dicationic Brönsted acidic ionic liquid can be easily recovered and reused. Conclusion: 1, 1’-Sulfinyldiethylammonium bis (hydrogen sulfate), as a novel dicationic ionic liquid, can act as a highly efficient catalyst for the synthesis of 3, 4-dihydropyrimidin-2(1H)-ones under solvent-free conditions.

Synthesis, Characterization and Application of N,N-Dimethyl-N-Sulfoethan Ammonium tetra-Chloro Aluminate: A Novel micro-Heterogeneous Cata-lyst for Synthesis of tri-Arylmethanes

2020 ◽  
Vol 17 ◽  
Author(s):  
Saeid Azimi ◽  
Niloofar Mohamadighader
Keyword(s):  
Ionic Liquid ◽  
Heterogeneous Catalyst ◽  
Mass Spectroscopy ◽  
Aromatic Aldehydes ◽  
Solid Catalyst ◽  
Sem Images ◽  
One Pot ◽  
Acidic Catalyst ◽  
Eds Analysis ◽  
Ft Ir

Abstract: A new solid catalyst was synthesized from an ionic liquid and heterogenised by changing anion reaction. The new heterogeneous acidic catalyst was characterized by SEM images, EDS analysis, AFM images, Ft-IR, HNMR, 13CNMR and Mass Spectroscopy. It was applied to synthesis of tri-arylmethanes throughout one-pot tri-component reactions among aromatic aldehydes, N,N-dimethylaniline and other carbonic nucleophiles such as anisole and indole. Hence, synthesis of convenient and inexpensive micro-heterogeneous catalyst was introduced, the efficiency of which was confirmed. Also, various useful products were synthesized throughout this simple and clean procedure.

Hydrogen production from cellulose catalyzed by an iridium complex in ionic liquid under mild conditions

2021 ◽  
Author(s):  
Genki Toyooka ◽  
Toshiki Tanaka ◽  
Kenji Kitayama ◽  
Naoko Kobayashi ◽  
Takashi Watanabe ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Hydrogen Production ◽  
Iridium Complex ◽  
Simple Method ◽  
Mild Conditions ◽  
Iridium Catalyst

A new and simple method for hydrogen production from cellulose using an iridium catalyst and an ionic liquid under mild conditions was developed.

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