Manganese dioxide andN,N′,N″-trihydroxyisocyanuric acid: a novel and recyclable catalytic system for aerobic oxidation of toluene derivatives in PEG-1000-based dicationic acidic ionic liquid

2015 ◽  
Vol 29 (5) ◽  
pp. 276-279 ◽  
Author(s):  
Tingting Lu ◽  
Lijie Zhang ◽  
Zhongxue Ge ◽  
Yueping Ji ◽  
Ming Lu
Keyword(s):  
Ionic Liquid ◽  
Manganese Dioxide ◽  
Catalytic System ◽  
Aerobic Oxidation ◽  
Acidic Ionic Liquid

Supported task-specific ionic liquid catalyst for highly efficient and recyclable aerobic oxidation of benzyl alcohols

2011 ◽  
Vol 89 (1) ◽  
pp. 68-71 ◽  
Author(s):  
Lin Liu ◽  
Juanjuan Ma ◽  
Zhen Sun ◽  
Jianping Zhang ◽  
Jingjing Huang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Catalytic System ◽  
Aerobic Oxidation ◽  
Copper Salt ◽  
High Conversion ◽  
Allylic Alcohols ◽  
Benzyl Alcohols ◽  
Highly Efficient ◽  
Silica Supports ◽  
Task Specific Ionic Liquid

A novel catalytic system was prepared by impregnating ionic liquid immobilized 2,2,6,6-tetramethylpiperidyl-1-oxyl (TEMPO) and copper salt onto various silica supports. This catalytic system was capable of rapidly converting different benzylic and allylic alcohols into the corresponding aldehydes under O2 atmosphere with high conversion. Recycling results showed that the catalyst could be easily recovered and reused.

Bi-functionalized PEG1000 ionic liquid [Imim-PEG1000-TEMPO][CuCl2−]: an efficient and reusable catalytic system for solvent-free aerobic oxidation of alcohols

2014 ◽  
Vol 38 (9) ◽  
pp. 4149-4154 ◽  
Author(s):  
Zhao-gang Wang ◽  
Yong Jin ◽  
Xiao-hua Cao ◽  
Ming Lu
Keyword(s):  
Ionic Liquid ◽  
Catalytic System ◽  
Aerobic Oxidation ◽  
Solvent Free ◽  
Oxidation Of Alcohols

A reusable catalytic system for efficient aerobic oxidation of alcohols with bi-functionalized PEG1000 ionic liquid [Imim-PEG1000-TEMPO][CuCl2−] was described.

scholarly journals One-pot conversion of cyclohexanol to ɛ-caprolactam using a multifunctional Na2WO4-acidic ionic liquid catalytic system

2017 ◽  
Vol 38 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Hefang Wang ◽  
Liyuan Jia ◽  
Rongbin Hu ◽  
Meidan Gao ◽  
Yanji Wang
Keyword(s):  
Ionic Liquid ◽  
Catalytic System ◽  
One Pot ◽  
Acidic Ionic Liquid

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.

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