Ionic liquid-stabilized vanadium oxo-clusters catalyzing alkane oxidation by regulating oligovanadates

2020 ◽  
Vol 10 (22) ◽  
pp. 7601-7612
Author(s):  
Qingqing Zhou ◽  
Ran Zhang ◽  
Difan Li ◽  
Bingjie Ding ◽  
Anna Zheng ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Alkane Oxidation ◽  
Highly Active

The specific ionic liquid [TBA][Pic]-stabilized vanadium oxo-clusters exist in the form of a trimer and a dimer and are highly active for catalyzing C–H bond oxidation with H2O2 as an oxidant.

Acceleration of Baylis-Hillman reaction using ionic liquid supported organocatalyst

2021 ◽  
Vol 08 ◽  
Author(s):  
Vivek Srivastava
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Reaction Rate ◽  
Reaction Medium ◽  
Catalyst Loading ◽  
Catalyst Recycling ◽  
Catalytic Systems ◽  
Heterogeneous Catalytic ◽  
Highly Active ◽  
Low Catalyst Loading

Background: Baylis-Hillman reaction suffers from the requirement of cheap starting materials, easy reaction protocol, possibility to create the chiral center in the reaction product has increased the synthetic efficacy of this reaction, and high catalyst loading, low reaction rate, and poor yield. Objective: The extensive use of various functional or non-functional ionic liquids (ILs) with organocatalyst increases the reaction rate of various organic transformations as a reaction medium and as a support to anchor the catalysts. Methods: In this manuscript, we have demonstrated the synthesis of quinuclidine-supported trimethylamine-based functionalized ionic liquid as a catalyst for the Baylis-Hillman reaction. Results: We obtained the Baylis-Hillman adducts in good, isolated yield, low catalyst loading, short reaction time, broad substrate scope, accessible product, and catalyst recycling. N-((E,3S,4R)-5-benzylidene-tetrahydro-4-hydroxy-6-oxo-2H-pyran-3-yl) palmitamide was also successfully synthesized using CATALYST-3 promoted Baylis-Hillman reaction. Conclusion: We successfully isolated the 25 types of Baylis-Hillman adducts using three different quinuclidine-supported ammonium-based ionic liquids such as Et3AmQ][BF4] (CATALYST-1), [Et3AmQ][PF6] (CATALYST-2), and [TMAAmEQ][NTf2](CATALYST-3) as new and efficient catalysts. Tedious and highly active N-((E,3S,4R)-5-benzylidene-tetrahydro-4-hydroxy-6-oxo-2H-pyran-3-yl) palmitamide derivative was also synthesized using CATALYST-3 followed by Baylis-Hillman reaction. Generally, all the responses demonstrated higher activity and yielded high competition with various previously reported homogenous and heterogeneous Catalytic systems. Easy catalyst and product recovery followed by six catalysts recycling were the added advantages of the prosed catalytic system.

scholarly journals Cationic ruthenium alkylidene catalysts bearing phosphine ligands

2016 ◽  
Vol 45 (8) ◽  
pp. 3627-3634 ◽  
Author(s):  
Koji Endo ◽  
Robert H. Grubbs
Keyword(s):  
Ionic Liquid ◽  
Phosphine Ligands ◽  
New Class ◽  
Highly Active ◽  
Metathesis Catalysts

The discovery of highly active catalysts and the success of ionic liquid immobilized systems have accelerated attention to a new class of cationic metathesis catalysts.

Magnetic Nanoparticles Supported Acidic Ionic Liquid as a Highly Active and Reusable Catalyst for Esterification

2016 ◽  
Vol 852 ◽  
pp. 485-488 ◽  
Author(s):  
Qiang Zhang ◽  
Xin Zhao ◽  
Xue Hua Zhu ◽  
Ji Hang Li
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
Catalytic Performance ◽  
Significant Loss ◽  
Reusable Catalyst ◽  
Hydrogen Sulfate ◽  
External Magnet ◽  
Acidic Ionic Liquid ◽  
Highly Active

A magnetic nanoparticles supported dual acidic ionic liquid catalyst was prepared via anchoring 3-sulfobutyl-1-(3-propyltriethoxysilane) imidazolium hydrogen sulfate onto the surface of silica-coated Fe3O4 nanoparticles. And this novel supported acidic ionic liquid catalyst showed good catalytic performance in esterification. More importantly, the catalyst could be easily recovered by an external magnet and reused six times without significant loss of catalytic activity.

Gold immobilized onto poly(ionic liquid) functionalized magnetic nanoparticles: a robust magnetically recoverable catalyst for the synthesis of propargylamine in water

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 34502-34510 ◽  
Author(s):  
Firouz Matloubi Moghaddam ◽  
Seyed Ebrahim Ayati ◽  
Seyed Hassan Hosseini ◽  
Ali Pourjavadi
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Coupling Reaction ◽  
Highly Active ◽  
Recoverable Catalyst ◽  
Functionalized Magnetic Nanoparticles ◽  
Magnetically Recoverable Catalyst ◽  
Poly Ionic Liquid ◽  
Supported Gold ◽  
Green Conditions

Supported gold(iii) on poly(ionic liquid) coated on magnetic nanoparticles produced a highly active, stable, recoverable and high loading for the synthesis of propargylamines (A3 coupling reaction) under green conditions.

A Highly Active Ionic Liquid Catalyst for Morita—Baylis—Hillman Reaction.

ChemInform ◽  
2006 ◽  
Vol 37 (22) ◽  
Author(s):  
Yu-Sheng Lin ◽  
Chiao-Yang Lin ◽  
Chih-Wei Liu ◽  
Thomas Y. R. Tsai
Keyword(s):  
Ionic Liquid ◽  
Highly Active
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