Synthesis, Characterization and Thermal Properties of a Novel Chiral Ionic Liquid with Chiral Center in Anion

2011 ◽  
Vol 233-235 ◽  
pp. 184-187
Author(s):  
Jin Yang Yu ◽  
Xiao Ling Hu ◽  
Yi Mei Tang ◽  
Liang Liang
Keyword(s):  
Ionic Liquid ◽  
Thermal Properties ◽  
Asymmetric Synthesis ◽  
Chiral Separation ◽  
Chiral Center ◽  
Chiral Catalyst ◽  
One Step ◽  
Ft Ir ◽  
Chiral Ionic Liquid ◽  
First Time

An imidazolium-based chiral ionic liquid with chiral center in anion was synthesized in one step from the materials of alkylation of N-methylimidzole and (S)-(-)-2-chloro-propionic acid for the first time. The structures and thermal properties of the objective product were confirmed by FT-IR,1HNMR and DSC, respectively. The results indicate that it may be used as a new chiral solvent for asymmetric synthesis, chiral catalyst and chiral separation.

L-Histidinium Chiral Ionic Liquid Functionalized β-Cyclodextrin as Chiral Selector in Capillary Electrophoresis

2021 ◽  
Author(s):  
Xiaofei Ma ◽  
Jingtang Li ◽  
Xiaoqi Li ◽  
Zijie Feng ◽  
Xuan Yang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Capillary Electrophoresis ◽  
Ionic Liquids ◽  
Molecular Modeling ◽  
Chiral Separation ◽  
Chiral Selector ◽  
Chiral Discrimination ◽  
Chiral Ionic Liquid ◽  
First Time ◽  
Good Agreement

Abstract Nowadays, ionic liquids (ILs) functionalized cyclodextrins (CDs) have drawn increasing attention in chiral separation. Herein, a novel β-CD derivative functionalized by L-histidinium IL, mono-6-deoxy-6-L-histidinium-β-cyclodextrin chloride (L-HMCDCl), was synthesized for the first time and utilized for enantioseparation of nefopam and chlorphenamine in capillary electrophoresis. The L-HMCDCl exhibited superior enantioselectivity compared with native β-CD. The effect of some key parameters such as chiral selector concentration, buffer pH and applied voltage on the enantioseparation was investigated in detail. In the interest of the chiral discrimination mechanism and the enhanced enantioselectivity of L-HMCDCl, molecular modeling with AutoDock was employed to study the interaction, which was in good agreement with experimental results.

scholarly journals Direct Catalytic Asymmetric Mannich-Type Reaction of an α-CF3 Amide to Isatin Imines

Synlett ◽  
2018 ◽  
Vol 30 (04) ◽  
pp. 488-492 ◽  
Author(s):  
Jin-Sheng Yu ◽  
Hidetoshi Noda ◽  
Naoya Kumagai ◽  
Masakatsu Shibasaki
Keyword(s):  
Lewis Acid ◽  
Tertiary Amine ◽  
Chiral Center ◽  
Chiral Catalyst ◽  
Type Reaction ◽  
One Step ◽  
Catalytic Asymmetric ◽  
Chiral Bisphosphine Ligand

An α-CF3 amide underwent direct asymmetric Mannich-type reaction to isatin imines in the presence of a chiral catalyst comprising a soft Lewis acid Cu(I), a chiral bisphosphine ligand, and Barton’s base. The Mannich adduct was converted in one step into a unique tricycle bearing a trifluoromethylated chiral center and an α-tertiary amine moiety.

Ionic liquid-assisted one-step preparation of ultrafine amorphous metallic hydroxide nanoparticles for the highly efficient oxygen evolution reaction

2020 ◽  
Vol 8 (31) ◽  
pp. 15767-15773 ◽  
Author(s):  
Youhai Cao ◽  
Song Guo ◽  
Changlin Yu ◽  
Jiangwei Zhang ◽  
Xiaoli Pan ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Highly Efficient ◽  
Synthesis Strategy ◽  
Effective Synthesis ◽  
One Step ◽  
First Time

A rapid one-step and effective synthesis strategy is reported for the first time to produce the ionic liquid-modified AMHs nanoparticles (e.g. FeNi) for the highly efficient OER.

Non-thermal polyimidization reaction using base–ionic liquid medium as a dual catalyst–solvent

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96914-96917 ◽  
Author(s):  
Ming Chen ◽  
Shuanglong Wang
Keyword(s):  
Ionic Liquid ◽  
Ambient Temperature ◽  
Liquid Medium ◽  
One Step ◽  
First Time ◽  
Ionic Liquid Medium

A one-step synthesis of PMDA–ODA polyimide at ambient temperature was reported for the first time, in which a polyimidization reaction was rapidly accomplished in 99% yield in an imidazolium-based ionic liquid containing a non-nucleophilic base.

Chiral separation of phenylalanine and tryptophan by capillary electrophoresis using a mixture ofβ-CD and chiral ionic liquid ([TBA] [l-ASP]) as selectors

2013 ◽  
Vol 28 (5) ◽  
pp. 610-614 ◽  
Author(s):  
Wu Yujiao ◽  
Wang Guoyan ◽  
Zhao Wenyan ◽  
Zhang Hongfen ◽  
Jing Huanwang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Capillary Electrophoresis ◽  
Chiral Separation ◽  
Chiral Ionic Liquid

scholarly journals Proline Based Chiral Ionic Liquids for Enantioselective Michael Reaction

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Kaoru Nobuoka ◽  
Satoshi Kitaoka ◽  
Tsutomu Kojima ◽  
Yuuki Kawano ◽  
Kazuya Hirano ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Positive Charge ◽  
Michael Reaction ◽  
Chiral Synthesis ◽  
Chiral Catalyst ◽  
New Approach ◽  
Chiral Ionic Liquids ◽  
Chiral Ionic Liquid

Chiral ionic liquids, starting from (S)-proline, have been prepared and evaluated the ability of a chiral catalyst. In Michael reaction of trans-β-nitrostyrene and cyclohexanone, all the reactions were carried out under homogeneous conditions without any solvent except for excess cyclohexanone. The chiral ionic liquid catalyst with the positive charge delocalized bulky pyrrolidinium cation shows excellent yields (up to 92%), diastereoselectivities (syn/anti = 96/4), and enantioselectivities (up to 95% ee) and could be reused at least three times without any loss of its catalytic activity. Such results demonstrated a promising new approach for green and economic chiral synthesis by using the chiral ionic liquids as a chiral catalyst and a chiral medium.

Functionalized assembly of solid membranes for chiral separation using polyelectrolytes and chiral ionic liquid

AIChE Journal ◽  
2013 ◽  
Vol 59 (12) ◽  
pp. 4772-4779 ◽  
Author(s):  
Hong Meng ◽  
Sumin Li ◽  
Ling Xiao ◽  
Chunxi Li
Keyword(s):  
Ionic Liquid ◽  
Chiral Separation ◽  
Chiral Ionic Liquid

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Synthesis, Characterization and Application of N,N-Dimethyl-N-Sulfoethan Ammonium tetra-Chloro Aluminate: A Novel micro-Heterogeneous Cata-lyst for Synthesis of tri-Arylmethanes

2020 ◽  
Vol 17 ◽  
Author(s):  
Saeid Azimi ◽  
Niloofar Mohamadighader
Keyword(s):  
Ionic Liquid ◽  
Heterogeneous Catalyst ◽  
Mass Spectroscopy ◽  
Aromatic Aldehydes ◽  
Solid Catalyst ◽  
Sem Images ◽  
One Pot ◽  
Acidic Catalyst ◽  
Eds Analysis ◽  
Ft Ir

Abstract: A new solid catalyst was synthesized from an ionic liquid and heterogenised by changing anion reaction. The new heterogeneous acidic catalyst was characterized by SEM images, EDS analysis, AFM images, Ft-IR, HNMR, 13CNMR and Mass Spectroscopy. It was applied to synthesis of tri-arylmethanes throughout one-pot tri-component reactions among aromatic aldehydes, N,N-dimethylaniline and other carbonic nucleophiles such as anisole and indole. Hence, synthesis of convenient and inexpensive micro-heterogeneous catalyst was introduced, the efficiency of which was confirmed. Also, various useful products were synthesized throughout this simple and clean procedure.

scholarly journals The Preparation, Thermal Properties, and Fire Property of a Phosphorus-Containing Flame-Retardant Styrene Copolymer

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 127 ◽  
Author(s):  
Yu Sun ◽  
Yazhen Wang ◽  
Li Liu ◽  
Tianyuan Xiao
Keyword(s):  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Limiting Oxygen Index ◽  
Chemical Structures ◽  
1H Nuclear Magnetic Resonance ◽  
Phosphorus Containing ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) acrylate, (6-oxidodibenzo [c,e][1,2] oxaphosphinin-6-yl) methyl acrylate (DOPOAA), has been prepared. Copolymers of styrene (St) and DOPOAA were prepared by emulsion polymerization. The chemical structures of copolymers containing levels of DOPOAA were verified using Fourier transform infrared (FT-IR) spectroscopy and 1H nuclear magnetic resonance (1H-NMR) spectroscopy. The thermal properties and flame-retardant behaviors of DOPO-containing monomers and copolymers were observed using thermogravimetric analysis and micro calorimetry tests. From thermogravimetric analysis (TGA), it was found out that the T5% for decomposition of the copolymer was lower than that of polystyrene (PS), but the residue at 700 °C was higher than that of PS. The results from micro calorimetry (MCC) tests indicated that the rate for the heat release of the copolymer combustion was lower than that for PS. The limiting oxygen index (LOI) for combustion of the copolymer rose with increasing levels of DOPOAA. These data indicate that copolymerization of the phosphorus-containing flame-retardant monomer, DOPOAA, into a PS segment can effectively improve the thermal stability and flame retardancy of the copolymer.

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