scholarly journals Facile catalyst recycling by thermomorphic behaviour avoiding organic solvents: a reactive ionic liquid in the homogeneous Pd-catalysed telomerisation of the renewable β-myrcene

2020 ◽  
Vol 10 (6) ◽  
pp. 1827-1834 ◽  
Author(s):  
Michael Terhorst ◽  
Anna Kampwerth ◽  
Amelie Marschand ◽  
Dieter Vogt ◽  
Andreas J. Vorholt ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Organic Solvents ◽  
Efficient Utilization ◽  
Catalyst Recycling ◽  
Catalyst Separation ◽  
Dimethyl Amine

Efficient utilization of reactive ionic liquid dimcarb for catalyst separation and as the dimethyl amine source in homogeneous Pd-catalysed telomerisation of renewable β-myrcene.

Imidazolium chloride-based ionic liquid-assisted improvement of lipase activity in organic solvents

2011 ◽  
Vol 11 (3) ◽  
pp. 259-263 ◽  
Author(s):  
Somayeh Daneshjoo ◽  
Neda Akbari ◽  
Abbas Akhavan Sepahi ◽  
Bijan Ranjbar ◽  
Ramezan-Ali Khavarinejad ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Organic Solvents ◽  
Lipase Activity ◽  
Imidazolium Chloride

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.

Active pyridinium based ionic liquid anchored quinuclidine organocatalyst for Morita-Baylis-Hillman reaction

2021 ◽  
Vol 18 ◽  
Author(s):  
Vivek Srivastava
Keyword(s):  
Ionic Liquid ◽  
Analytical Techniques ◽  
Chemical Yield ◽  
Biologically Active ◽  
Catalyst Loading ◽  
Catalyst Recycling ◽  
Ether Extraction ◽  
Different Types ◽  
Low Catalyst Loading

: In the present manuscript, we easily synthesized three different types of ionic liquid supported 3-quinuclidinone organocatalysts such as [PyAmEQ][BF4] (Py-CATALYST-1), [PyAmEQ][PF6] (Py-CATALYST-2), and [PyAmEQ][NTf2] (Py-CATALYST-3). After performing the careful characterization of the above catalysts with sophisticated analytical techniques, we utilized them as a catalyst to study the passive Morita-Baylis-Hillman reaction. The corresponding Morita-Baylis-Hillman adducts were easily isolated, followed by the simple ether extraction method. Moreover, the above protocol also promoted low catalyst loading, short reaction time, wide substrate scope, easy product, and catalyst recycling. We easily recycled the catalytic system for 5 runs with no noticeable loss in the chemical yield. Additionally, Py-CATALYST-3 was also used to prepare biologically active materials, i.e., N-((E,3S,4R)-5-benzylidene-tetrahydro-4-hydroxy-6-oxo-2H-pyran-3-yl) palmitamide derivatives.

The wormlike micelles formed using an ionic liquid surfactant and polar organic solvents at low temperature without additives and their lubricant properties

Soft Matter ◽  
2021 ◽  
Author(s):  
Huijiao Cao ◽  
Wenlin Xu ◽  
Xia Guo
Keyword(s):  
Ionic Liquid ◽  
Low Temperature ◽  
Organic Solvent ◽  
Organic Solvents ◽  
Wormlike Micelles ◽  
Polar Organic Solvents ◽  
Ionic Liquid Surfactant ◽  
Nonpolar Organic

Wormlike micelles (or reverse wormlike micelles) are flexible cylindrical chains that are normally formed in water (or a nonpolar organic solvent) at 25.0 °C or above; the formation of wormlike micelles at lower temperatures is rare.

scholarly journals Microscopic Dynamics in an Ionic Liquid Augmented with Organic Solvents

2019 ◽  
Vol 123 (32) ◽  
pp. 19354-19361 ◽  
Author(s):  
Naresh C. Osti ◽  
Ray A. Matsumoto ◽  
Matthew W. Thompson ◽  
Peter T. Cummings ◽  
Madhusudan Tyagi ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Organic Solvents ◽  
Microscopic Dynamics

Ionic Liquid Promoted Eco-friendly and Efficient Synthesis of Six-membered Npolyheterocycles

2018 ◽  
Vol 15 (8) ◽  
pp. 1124-1146 ◽  
Author(s):  
Navjeet Kaur
Keyword(s):  
Organic Chemistry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Review Article ◽  
Environmentally Benign ◽  
Wide Range ◽  
Catalyzed Reactions ◽  
Metal Catalyzed ◽  
Reaction Media

Background: The synthesis of N-polyheterocycles by environmentally benign method is highly attractive but challenging proposition. New strategies have been developed for the preparation of polycyclic heterocycles in the last decades. In this review article, the synthesis of nitrogen containing six-membered polycyclic heterocyclic compounds is presented with the application of ionic liquids. This contribution focuses on the literature related to the total synthesis of six-membered N-polyheterocycles. Objective: Ionic liquids not only acted as environmentally benign reaction media but also as catalysts which afforded the very promising replacements of traditional molecular solvents in organic chemistry due to their stability, non-flammability, non-volatility and ease of recyclability. Ionic liquids are utilized in metal catalyzed reactions in place of organic solvents in the last years. It has attracted considerable attention in recent years. Ionic liquids acted as alternatives of organic solvents and these ILs are environment friendly. Conclusion: In the area of green chemistry ionic liquid assisted synthesis is a very promising technique which afforded a flexible platform for the formation of heterocycles. The influence of ILs on the development of efficient and new synthetic protocols over the last decade for the construction of N-polyheterocycles is featured in this review article. These synthetic strategies will continue to attract more attention and will find a wide range of applications in organic synthesis. In conclusion, ionic liquids assisted syntheses have become an efficient and powerful tool in organic chemistry quickly.

Ruthenium-Catalyzed [2 + 2] Cyclization of 1,7-Allenynes in Ionic Liquid and Catalyst Recycling

Heterocycles ◽  
2018 ◽  
Vol 97 (2) ◽  
pp. 696
Author(s):  
Nozomi Saito ◽  
Momoko Koyama ◽  
Yoshihiro Sato
Keyword(s):  
Ionic Liquid ◽  
Catalyst Recycling

A Phosphine-mediated Synthesis of 2,3,4,5-tetra-substituted Nhydroxypyrroles from α-oximino Ketones and Dialkyl Acetylenedicarboxylates Under Ionic Liquid Green-media

2018 ◽  
Vol 21 (1) ◽  
pp. 14-18
Author(s):  
Ashraf S. Shahvelayati ◽  
Maryam Ghazvini ◽  
Khadijeh Yadollahzadeh ◽  
Akram S. Delbari
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Condensation Reaction ◽  
Reaction Medium ◽  
Sustainable Chemistry ◽  
Polyfunctional Compounds ◽  
High Yields ◽  
Work Up ◽  
Reaction Media

Background: The development of multicomponent reactions (MCRs) in the presence of task-specific ionic liquids (ILs), used not only as environmentally benign reaction media, but also as catalysts, is a new approach that meet with the requirements of sustainable chemistry. In recent years, the use of ionic liquids as a green media for organic synthesis has become a chief study area. This is due to their unique properties such as non-volatility, non-flammability, chemical and thermal stability, immiscibility with both organic compounds and water and recyclability. Ionic liquids are used as environmentally friendly solvents instead of hazardous organic solvents. Objective: We report the condensation reaction between α-oximinoketone and dialkyl acetylene dicarboxylate in the presence of triphenylphosphine to afford substituted pyrroles under ionic liquid conditions in good yields. Result: Densely functionalized pyrroles was easily prepared from reaction of α-oximinoketones, dialkyl acetylene dicarboxylate in the presence of triphenylphosphine in a quantitative yield under ionic liquid conditions at room temperature. Conclusion: In conclusion, ionic liquids are indicated as a useful and novel reaction medium for the selective synthesis of functionalized pyrroles. This reaction medium can replace the use of hazardous organic solvents. Easy work-up, synthesis of polyfunctional compounds, decreased reaction time, having easily available-recyclable ionic liquids, and good to high yields are advantages of present method.

Sign in / Sign up

Export Citation Format

Share Document