Special Issue "Organocatalysis in Ionic Liquids"

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: 31 January 2018

Special Issue Editor

Guest Editor
Prof. Dr. Sandrine Bouquillon

Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims Champagne-Ardenne, UFR Sciences, BP 1039 boîte 44, 51687 Reims Cedex 2, France
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Special Issue Information

Dear Colleagues,

This Special Issue is dedicated to organocatalytic processes, which could be realized in ionic liquids medium. This Special Issue will contribute to the field by showing the role of such solvents (or co-solvents) in organocatalysis, especially concerning the selectivity, the enantioselectivity, and the possibility of recycling catalytic species. Special attention will be given to green processes or processes involving bio-sourced ionic liquids and/or substrates.

Prof. Dr. Sandrine Bouquillon
Guest Editor

Manuscript Submission Information

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Keywords

  • ionic liquids
  • organocatalysis
  • recycling
  • selectivity
  • enantioselectivity
  • green processes
  • green ionic liquids

Published Papers (5 papers)

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Research

Open AccessArticle PEG1000-Based Dicationic Acidic Ionic Liquid/Solvent-Free Conditions: An Efficient Catalytic System for the Synthesis of Bis(Indolyl)methanes
Catalysts 2017, 7(10), 300; doi:10.3390/catal7100300
Received: 18 September 2017 / Revised: 5 October 2017 / Accepted: 7 October 2017 / Published: 11 October 2017
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Abstract
An efficient procedure has been researched for the solvent-free synthesis of bis(indolyl)methanes via a one-pot reaction of indoles and aldehydes or ketones promoted by PEG1000-based dicationic acidic ionic liquid (PEG1000-DAIL). The catalyst PEG1000-DAIL could be reused seven
[...] Read more.
An efficient procedure has been researched for the solvent-free synthesis of bis(indolyl)methanes via a one-pot reaction of indoles and aldehydes or ketones promoted by PEG1000-based dicationic acidic ionic liquid (PEG1000-DAIL). The catalyst PEG1000-DAIL could be reused seven times with excellent results. Furthermore, through this method, a highly chemoselective reaction of benzaldehyde and acetophenone with indole could be achieved. Full article
(This article belongs to the Special Issue Organocatalysis in Ionic Liquids)
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Open AccessArticle Conversion of Carbohydrates into Platform Chemicals Catalyzed by Alkaline Ionic Liquids
Catalysts 2017, 7(9), 245; doi:10.3390/catal7090245
Received: 19 June 2017 / Revised: 7 August 2017 / Accepted: 18 August 2017 / Published: 23 August 2017
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Abstract
A series of alkaline ionic liquids (ILs) including 1-butyl-3-methylimidazolium benzoate ([BMIM]PHCOO), 1-butyl-3-methylimidazolium carbonate ([BMIM]2CO3), 1-butyl-3-methylimidazolium acetate ([BMIM]OAc), 1-butyl-3-methylimidazolium hydroxide ([BMIM]OH), ethanolamine tetrafluoroborate ([MEA]BF4), and 1,1,3,3-tetramethylguanidine (TMG)-based ILs, etc., were synthesized and utilized as catalysts for the conversion
[...] Read more.
A series of alkaline ionic liquids (ILs) including 1-butyl-3-methylimidazolium benzoate ([BMIM]PHCOO), 1-butyl-3-methylimidazolium carbonate ([BMIM]2CO3), 1-butyl-3-methylimidazolium acetate ([BMIM]OAc), 1-butyl-3-methylimidazolium hydroxide ([BMIM]OH), ethanolamine tetrafluoroborate ([MEA]BF4), and 1,1,3,3-tetramethylguanidine (TMG)-based ILs, etc., were synthesized and utilized as catalysts for the conversion of carbohydrates into 5-HMF. 1,1,3,3-tetramethylguanidine tetrafluoroborate ([TMG]BF4) was confirmed to exhibit excellent catalytic activity, and was much cheaper than other ILs such as 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) for use as a solvent in the conversion of C6 carbohydrates into 5-HMF. The 5-HMF yields from fructose, glucose, cellobiose, and microcrystalline cellulose (MCC) were 74.19%, 27.33%, 20.20%, and 17.73%, respectively. In addition, the possible pathway of carbohydrates (MCC, cellobiose, glucose, etc.) conversion into 5-HMF with [TMG]BF4 as a catalyst was speculated, and the conversion of glucose into 5-HMF was determined to likely be the committed step in the transformation of MCC catalyzed by [TMG]BF4. Full article
(This article belongs to the Special Issue Organocatalysis in Ionic Liquids)
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Open AccessCommunication Direct Conversion of Propylene Oxide to 3-Hydroxy Butyric Acid Using a Cobalt Carbonyl Ionic Liquid Catalyst
Catalysts 2017, 7(8), 228; doi:10.3390/catal7080228
Received: 15 June 2017 / Revised: 22 July 2017 / Accepted: 27 July 2017 / Published: 30 July 2017
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Abstract
The reported catalytic system demonstrates the possibility of efficient mass production of 3-hydroxybutyric acid (3-HBA) from inexpensive raw materials. The direct coupling of propylene oxide, water, and CO was catalyzed by 1-butyl-3-methylimidazolium cobalt tetracarbonyl ([Bmim][Co(CO)4]) ionic liquid to form 3-HBA with
[...] Read more.
The reported catalytic system demonstrates the possibility of efficient mass production of 3-hydroxybutyric acid (3-HBA) from inexpensive raw materials. The direct coupling of propylene oxide, water, and CO was catalyzed by 1-butyl-3-methylimidazolium cobalt tetracarbonyl ([Bmim][Co(CO)4]) ionic liquid to form 3-HBA with >99% conversion (49% selectivity) under mild conditions. Full article
(This article belongs to the Special Issue Organocatalysis in Ionic Liquids)
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Open AccessCommunication Lipase-Catalyzed Synthesis of Indolyl 4H-Chromenes via a Multicomponent Reaction in Ionic Liquid
Catalysts 2017, 7(6), 185; doi:10.3390/catal7060185
Received: 25 April 2017 / Revised: 28 May 2017 / Accepted: 31 May 2017 / Published: 8 June 2017
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Abstract
Synthesis of indolyl 4H-chromenes via a three-component reaction catalyzed by lipase in ionic liquidsis reported here for the first time. High yields (77–98%) were obtained when Mucor miehei lipase was used as the catalyst in [EMIM][BF4]. Furthermore, [EMIM][BF4] exhibited
[...] Read more.
Synthesis of indolyl 4H-chromenes via a three-component reaction catalyzed by lipase in ionic liquidsis reported here for the first time. High yields (77–98%) were obtained when Mucor miehei lipase was used as the catalyst in [EMIM][BF4]. Furthermore, [EMIM][BF4] exhibited good reusability in this enzymatic reaction. This study affords a new example of lipase catalytic promiscuity and broadens the application range of ionic liquid in biocatalysis. Full article
(This article belongs to the Special Issue Organocatalysis in Ionic Liquids)
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Open AccessArticle Caprolactam-Based Brønsted Acidic Ionic Liquids for Biodiesel Production from Jatropha Oil
Catalysts 2017, 7(4), 102; doi:10.3390/catal7040102
Received: 21 February 2017 / Revised: 20 March 2017 / Accepted: 23 March 2017 / Published: 27 March 2017
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Abstract
Caprolactam-based ionic liquids show many advantages, such as the lower toxicity, lower cost, and a simple preparation process. In this work, caprolactam-based ionic liquids were prepared and adopted as catalysts for the transesterification of Jatropha oil with methanol. The results demonstrated that the
[...] Read more.
Caprolactam-based ionic liquids show many advantages, such as the lower toxicity, lower cost, and a simple preparation process. In this work, caprolactam-based ionic liquids were prepared and adopted as catalysts for the transesterification of Jatropha oil with methanol. The results demonstrated that the SO3H-functional caprolactam‐based ionic liquids have higher catalytic activity than those of the caprolactam-based ionic liquids without sulfonic group or the SO3H-functional pyridine-based ionic liquids, attributed to their stronger Brønsted acidity. By optimizing the reaction parameter, the biodiesel yield catalyzed by 1-(4-sulfonic group) butylcaprolactamium hydrogen sulfate ([HSO3-bCPL][HSO4]) could reach above 95% at 140 °C for 3 h. Furthermore, the ionic liquid had a good reusability. Full article
(This article belongs to the Special Issue Organocatalysis in Ionic Liquids)
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