Imidazolium-based ionic liquid decorated zinc porphyrin catalyst for converting CO2 into five-membered heterocyclic molecules

2018 ◽  
Vol 2 (1) ◽  
pp. 125-132 ◽  
Author(s):  
Yaju Chen ◽  
Rongchang Luo ◽  
Zhi Yang ◽  
Xiantai Zhou ◽  
Hongbing Ji
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Zinc Porphyrin ◽  
Porphyrin Complex ◽  
Heterocyclic Molecules ◽  
Solvent Free Conditions

The bifunctional zinc(ii) porphyrin complex with flexible quaternary imidazole ionic liquids exhibited improved catalytic activity and reusability for the reaction of CO2with epoxides or aziridines to form five-membered heterocyclic products without any additives under solvent-free conditions.

scholarly journals N-Hydroxyphthalimide Supported on Silica Coated with Ionic Liquids Containing CoCl2 (SCILLs) as New Catalytic System for Solvent-Free Ethylbenzene Oxidation

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 252 ◽  
Author(s):  
Gabriela Dobras ◽  
Kornela Kasperczyk ◽  
Sebastian Jurczyk ◽  
Beata Orlińska
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Fold Increase ◽  
Solvent Free ◽  
High Catalytic Activity ◽  
Ethylbenzene Oxidation ◽  
Solvent Free Conditions ◽  
Ft Ir ◽  
Tga Analysis ◽  
Ft Ir Spectroscopy

N-Hydroxyphthalimide was immobilized via ester bond on commercially available silica gel (SiOCONHPI) and then coated with various ionic liquids containing dissolved CoCl2 (SiOCONHPI@CoCl2@IL). New catalysts were characterized by means of FT IR spectroscopy, elemental analysis, SEM and TGA analysis and used in ethylbenzene oxidation with oxygen under mild solvent-free conditions (80 °C, 0.1 MPa). High catalytic activity of SiOCONHPI was proved. In comparison to a non-catalytic reaction, a two-fold increase in conversion of ethylbenzene was observed (from 4.7% to 8.6%). Coating of SiOCONHPI with [bmim][OcOSO3], [bmim][Cl] and [bmim][CF3SO3] containing CoCl2 enabled to increase the catalytic activity in relation to systems in which IL and CoCl2 were added directly to reaction mixture. The highest conversion of ethylbenzene was obtained while SiOCONHPI@CoCl2@[bmim][OcOSO3] were used (12.1%). Catalysts recovery and reuse was also studied.

Preparation, characterization and application of succinimidinium hydrogensulfate ([H-Suc]HSO4) as an efficient ionic liquid catalyst for the N-Boc protection of amines

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 19790-19798 ◽  
Author(s):  
Farhad Shirini ◽  
Omid Goli Jolodar ◽  
Mohadeseh Seddighi ◽  
Hojatollah Takbiri Borujeni
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Sulfuric Acid ◽  
Solvent Free ◽  
Solvent Free Conditions

Succinimidinium hydrogensulfate ([H-Suc]HSO4), which is prepared from the reaction of succinimide and sulfuric acid, showed excellent catalytic activity for the N-Boc protection of various amines under solvent free conditions.

Cholinium ionic liquids as cheap and reusable catalysts for the synthesis of coumarins via Pechmann reaction under solvent-free conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (44) ◽  
pp. 22946-22950 ◽  
Author(s):  
Yuehua Zhang ◽  
Anlian Zhu ◽  
Qianqian Li ◽  
Lingjun Li ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ethyl Acetoacetate ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Pechmann Reaction ◽  
Solvent Free Conditions

Ionic liquid [N112OH][HSO4] was found to be an efficient and reusable catalyst for Pechmann reaction under solvent-free conditions. UV-vis studies suggested that the high catalytic performance of this catalyst was mainly due to its ability to increase the content of keto tautomer of ethyl acetoacetate.

Direct oxidative amidation of aldehydes with amines catalyzed by heteropolyanion-based ionic liquids under solvent-free conditions via a dual-catalysis process

2016 ◽  
Vol 14 (5) ◽  
pp. 1784-1793 ◽  
Author(s):  
Renzhong Fu ◽  
Yang Yang ◽  
Jin Zhang ◽  
Jintao Shao ◽  
Xuming Xia ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Dual Catalysis ◽  
Oxidative Amidation ◽  
Catalysis Process

A heteropolyanion-based ionic liquid catalyzed oxidative amidation of aldehydes with amines via a dual-catalysis pathway has been reported.

Ionic Liquid Catalyzed Efficient Regioselective Synthesis of 1,4- Disubstituted 1,2,3-Triazoles under Metal and Solvent free Conditions

2020 ◽  
Vol 07 ◽  
Author(s):  
Abid H. Banday ◽  
Victor J. Hruby
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Regioselective Synthesis ◽  
Chromatographic Separations ◽  
One Pot ◽  
Green Protocol ◽  
Metal Free ◽  
Organic Azides ◽  
Solvent Free Conditions

Background: Unprecedented, one-pot regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles through azide- aldehyde (3+2) organo-click cycloaddition under metal and solvent-free conditions, is described. Objective: Solvent and metal free synthesis of biologically and industrially important triazoles. Methods: Efficient and high yielding synthesis of products avoiding the tedious high solvent workups and chromatographic separations. The synthesis doesn’t involve the routine acetylenes which are very costly but instead cheaper starting materials like aldehydes and organic azides are used. Results: Green protocol based on the catalysis through Ionic Liquids which simultaneously act as solvents. The products are obtained in good to excellent yields in hassle free synthesis. Conclusion: Efficient and green synthesis of structurally and biologically important triazoles.

Synthesis of dibenzoxanthene and acridine derivatives catalyzed by 1,3-disulfonic acid imidazolium carboxylate ionic liquids

RSC Advances ◽  
2014 ◽  
Vol 4 (78) ◽  
pp. 41287-41291 ◽  
Author(s):  
Arup Kumar Dutta ◽  
Pinky Gogoi ◽  
Ruli Borah
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Disulfonic Acid ◽  
Acridine Derivatives ◽  
Solvent Free Conditions

1,3-Disulfonic acid imidazolium carboxylate [DSIM][X] (where X = [CH3COO]−, [CCl3COO]−, [CF3COO]−) ILs were synthesized and their catalytic activity examined for the preparation of 14H-dibenzo[a,j]xanthene and 1,8-dioxo-decahydroacridine derivatives under solvent-free conditions and in water at 80–100 °C.

Graphene oxide immobilized with ionic liquids: facile preparation and efficient catalysis for solvent-free cycloaddition of CO2 to propylene carbonate

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 72361-72368 ◽  
Author(s):  
Jie Xu ◽  
Mang Xu ◽  
Jing Wu ◽  
Hao Wu ◽  
Wei-Hong Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Propylene Carbonate ◽  
Propylene Oxide ◽  
Solvent Free ◽  
High Catalytic Activity ◽  
Graphene Oxides ◽  
Facile Preparation

Graphene oxides were grafted with functionalized ionic liquid and showed high catalytic activity in cycloaddition of CO2 with propylene oxide to propylene carbonate.

Preparation and Characterization of a Novel Room Temperature Dicationic Ionic Liquid and its Application in the Synthesis of Xanthenediones Under Solvent-Free Conditions

2018 ◽  
Vol 21 (8) ◽  
pp. 602-608 ◽  
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Reaction Times ◽  
Significant Loss ◽  
Solvent Free ◽  
Acidity Function ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Hammett Acidity Function ◽  
Dicationic Ionic Liquid

Aim and Objective: In the present work, 1, 1’-sulfinyldiethylammonium bis (hydrogen sulfate) as a novel room temperature dicationic ionic liquid was synthesized and used as a catalyst for xanthenediones synthesis. Material and Method: The dicationic ionic liquid has been synthesized using ethylamine and thionyl chloride as precursors. Then, by the reaction of [(EtNH2)2SO]Cl2 with H2SO4, [(EtNH2)2SO][HSO4]2 was prepared and after that, it was characterized by FT-IR, 1H NMR, 13C NMR as well as Hammett acidity function. This dicationic ionic liquid was used as a catalyst for the synthesis of xanthenediones via condensation of structurally diverse aldehydes and dimedone under solvent-free conditions. The progress of the reaction was monitored by thin layer chromatography (ethyl acetate/n-hexane = 3/7). Results: An efficient solvent-free method for the synthesis of xanthenediones has been developed in the presence of [(EtNH2)2SO][HSO4]2 as a powerful catalyst with high to excellent yields, and short reaction times. Additionally, recycling studies have demonstrated that the dicationic ionic liquid can be readily recovered and reused at least four times without significant loss of its catalytic activity. Conclusion: This new dicationic ionic liquid can act as a highly efficient catalyst for xanthenediones synthesis under solvent-free conditions.

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 and Characterization of a Novel Ionic Liquid Based on N,N,N,N-tetramethylethylenediamine and its Application in the Synthesis of 1,8-dioxo-octahydro Xanthenes

2018 ◽  
Vol 21 (7) ◽  
pp. 526-532 ◽  
Author(s):  
Zahra Abdi Piralghar ◽  
Mohammad Mahmoodi Hashemi ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Chlorosulfonic Acid ◽  
Solvent Free ◽  
Aryl Aldehydes ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Solvent Free Conditions ◽  
Aryl Aldehyde ◽  
High Yields

Aim and Objective: In this work, we synthesized and characterized a novel Brönsted acidic ionic liquid from the reaction of N, N, N’, N’-tetramethylethylenediamine with chlorosulfonic acid and explored its catalytic activity in 1, 8-dioxo-octahydroxanthenes synthesis. Materials and Methods: Dimedone, aryl aldehydes, and the ionic liquid as the catalyst were reacted under solvent-free conditions. The progressive of the reaction was monitored by a thin layer of chromatography (ethyl acetate/n-hexane = 1/5). All products were characterized as the basis of their spectra data and melting point by comparison with those reported in the literature. Results: The prepared ionic liquid was successfully applied in the synthesis of 1, 8-dioxooctahydroxanthenes in good to high yields on the reaction of aryl aldehyde and dimedone at 120oC under solvent-free conditions. Conclusion: This research demonstrates that the catalyst is impressive for 1, 8-dioxo-octahydroxanthenes synthesis under solvent-free conditions.

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