scholarly journals A THEORETICAL STUDY OF THE CYCLOADDITION REACTION BETWEEN N-MESYLNITROINDOLES AND ISOPRENE ASSISTED BY MICROWAVE IRRADIATION. PROTIC IONIC LIQUIDS VS FREE SOLVENT

2016 ◽  
Author(s):  
Pedro Mancini ◽  
Mauro Cainelli ◽  
Carla Ormachea ◽  
Pablo Noriega ◽  
María Kneeteman
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Theoretical Study ◽  
Cycloaddition Reaction ◽  
Protic Ionic Liquids

A theoretical study of the copper(i)-catalyzed 1,3-dipolar cycloaddition reaction in dabco-based ionic liquids: the anion effect on regioselectivity

2010 ◽  
Vol 12 (8) ◽  
pp. 1958 ◽  
Author(s):  
Cinzia Chiappe ◽  
Benedetta Mennucci ◽  
Christian Silvio Pomelli ◽  
Angelo Sanzone ◽  
Alberto Marra
Keyword(s):  
Ionic Liquids ◽  
Theoretical Study ◽  
Cycloaddition Reaction ◽  
Dipolar Cycloaddition ◽  
Anion Effect

scholarly journals Theoretical study of intermolecular interactions in protic ionic liquids: a single ion pair picture

2021 ◽  
Vol 1719 (1) ◽  
pp. 012023
Author(s):  
P Nanthanasit ◽  
N Chattrapiban ◽  
M Jitvisate ◽  
P Nimmanpipug ◽  
S Rimjaem
Keyword(s):  
Ionic Liquids ◽  
Intermolecular Interactions ◽  
Theoretical Study ◽  
Ion Pair ◽  
Protic Ionic Liquids

Protic ionic liquids as catalysts for a three-component coupling/hydroarylation/dehydrogenation tandem reaction

2018 ◽  
Vol 73 (7) ◽  
pp. 515-519
Author(s):  
Maren Muntzeck ◽  
René Wilhelm
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Oxidative Dehydrogenation ◽  
Quinoline Derivative ◽  
Tandem Reaction ◽  
Counter Anion ◽  
Protic Ionic Liquids ◽  
Nitrate Anions ◽  
Three Component Coupling

AbstractProtic ionic liquids with nitrate anions were used as solvents and catalysts for a three-component oxidative dehydrogenation tandem reaction via the coupling and hydroarylation of benzaldehyde, aniline, and phenylacetylene to a quinoline derivative. The reaction was supported by air and microwave irradiation. The presence of nitrate as counter anion in the protic ionic liquids was essential for the reaction.

Rapid formation of diphenylmethyl ethers and thioethers using microwave irradiation and protic ionic liquids

2012 ◽  
Vol 53 (16) ◽  
pp. 2035-2039 ◽  
Author(s):  
Jarrad M. Altimari ◽  
Joshua P. Delaney ◽  
Linden Servinis ◽  
Jennifer S. Squire ◽  
Megan T. Thornton ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Protic Ionic Liquids ◽  
Rapid Formation

scholarly journals Protic Ionic Liquids as Efficient Solvents in Microwave-Assisted Extraction of Rhein and Emodin from Rheum palmatum L.

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2770 ◽  
Author(s):  
Yunchang Fan ◽  
Zeyu Niu ◽  
Chen Xu ◽  
Lei Yang ◽  
Tuojie Yang
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Irradiation Time ◽  
Chinese Herb ◽  
Microwave Assisted Extraction ◽  
Active Components ◽  
Protic Ionic Liquids ◽  
Microwave Assisted ◽  
Rheum Palmatum ◽  
Assisted Extraction

Rheum palmatum L. (R. palmatum L.) is a traditional Chinese herb and food, in which rhein and emodin are the main bioactive components. The extraction of the two compounds from R. palmatum L. is, thus, of great importance. In this work, protic ionic liquids (PILs) were applied in the microwave-assisted extraction (MAE) of rhein and emodin from R. palmatum L., which avoids the toxicity of organic solvents. The results of the present study indicate that PILs possessing higher polarity exhibit higher extraction ability due to their stronger absorption ability for microwave irradiation. Compared with conventional solvents, such as methanol, trichloromethane, and deep eutectic solvents (DESs), the PIL, 1-butyl-3-himidazolium methanesulfonate ([BHim]MeSO3) reported herein is more efficient. The selected extraction conditions of liquid–solid ratio, microwave irradiation time, microwave irradiation power, and PIL concentration were 40 g·g−1, 50 s, 280 W, and 80%, respectively. Under the selected conditions, the extraction yields of rhein and emodin were 7.8 and 4.0 mg·g−1, respectively. These results suggest that PILs are efficient extraction solvents for the separation of active components from natural products.

Accessing Highly-Halogenated Flavanones Using Protic Ionic Liquids and Microwave Irradiation

2012 ◽  
Vol 16 (1) ◽  
pp. 121-126 ◽  
Author(s):  
Megan T. Thornton ◽  
Luke C. Henderson ◽  
Nolene Byrne ◽  
Frederick M. Pfeffer
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Protic Ionic Liquids

Eco-Friendly Synthesis of Pyrazoline Derivatives

2017 ◽  
Vol 9 (04) ◽  
Author(s):  
Mahesh G. Kharatmol ◽  
Deepali Jagdale
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Organic Synthesis ◽  
Ultrasonic Irradiation ◽  
Minimal Energy ◽  
Anticancer Activities ◽  
Conventional Methods

Pyrazoline class of compounds serve as better moieties for an array of treatments, they have antibacterial, antifungal, antiinflammatory, antipyretic, diuretic, cardiovascular activities. Apart from these they also have anticancer activities. So, pertaining to its importance, many attempts are made to synthesize pyrazolines. Since conventional methods of organic synthesis are energy and time consuming. There are elaborate pathways for green and eco-friendly synthesis of pyrazoline derivatives including microwave irradiation, ultrasonic irradiation, grinding and use of ionic liquids which assures the synthesis of the same within much lesser time and by use of minimal energy

Polar Diels-Alder Reactions Under Microwave Irradiation Employing Different Heterocyclic Compounds as Electrophiles

2019 ◽  
Vol 16 (6) ◽  
pp. 527-543 ◽  
Author(s):  
Pedro M.E. Mancini ◽  
Carla M. Ormachea ◽  
María N. Kneeteman
Keyword(s):  
Organic Synthesis ◽  
Heterocyclic Compounds ◽  
Ionic Conduction ◽  
Theoretical Calculations ◽  
Cycloaddition Reaction ◽  
Diels Alder ◽  
The Other ◽  
Conventional Heating ◽  
Protic Ionic Liquids ◽  
Solvent Free Conditions

During the last twenty years, our research group has been working with aromatic nitrosubstituted compounds acting as electrophiles in Polar Diels-Alder (P-DA) reactions with different dienes of diverse nucleophilicity. In this type of reaction, after the cycloaddition reaction, the nitrated compounds obtained as the [4+2] cycloadducts suffer cis-extrusion with the loss of nitrous acid and a subsequent aromatization. In this form, the reaction results are irreversible. On the other hand, the microwave-assisted controlled heating become a powerful tool in organic synthesis as it makes the reaction mixture undergo heating by a combination of thermal effects, dipolar polarization and ionic conduction. As the Diels-Alder (D-A) reaction is one of the most important process in organic synthesis, the microwave (MW) irradiation was applied instead of conventional heating, and this resulted in better yields and shorter reaction times. Several substituted heterocyclic compounds were used as electrophiles and different dienes as nucleophiles. Two experimental situations are involved: one in the presence of Protic Ionic Liquids (PILs) as solvent and the other under solvent-free conditions. The analysis is based on experimental data and theoretical calculations.

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