Design, preparation and characterization of a new ionic liquid, 1,3-disulfonic acid benzimidazolium chloride, as an efficient and recyclable catalyst for the synthesis of tetrahydropyridine under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67405-67411 ◽  
Author(s):  
Mohsen Abbasi
Keyword(s):  
Ionic Liquid ◽  
Mass Spectra ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Disulfonic Acid ◽  
H Nmr ◽  
Solvent Free Conditions ◽  
Ft Ir ◽  
C Nmr

In the present work, 1,3-disulfonic acid benzimidazolium chloride as a new ionic liquid, is synthesized, and characterized by studying its FT-IR, 1H NMR, 13C NMR as well as mass spectra.

Introduction of a novel nanosized N-sulfonated Brönsted acidic catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation under solvent-free conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 26026-26037 ◽  
Author(s):  
Omid Goli-Jolodar ◽  
Farhad Shirini ◽  
Mohadeseh Seddighi
Keyword(s):  
Sulfonic Acid ◽  
Solvent Free ◽  
Acidic Catalyst ◽  
H Nmr ◽  
Solvent Free Conditions ◽  
Afm Analysis ◽  
Hantzsch Condensation ◽  
Different Types ◽  
Ft Ir ◽  
C Nmr

In this research NS-C4(DABCO-SO3H)2)·4Cl as a new nano sized N-sulfonic acid was prepared and characterized using different types of methods including FT-IR, 1H NMR, 13C NMR, mass, XRD, TGA, SEM and AFM analysis.

Synthesis and Characterization of Quaternary Ammonium-Based Ionic Liquid

2012 ◽  
Vol 433-440 ◽  
pp. 178-182 ◽  
Author(s):  
She Ying Dong ◽  
Peng Hui Zhang ◽  
An Xiang Tian ◽  
Ting Lin Huang
Keyword(s):  
Ionic Liquid ◽  
Quaternary Ammonium ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Ft Ir ◽  
Conventional Methods ◽  
C Nmr

A quaternary ammonium-based ionic liquid, n-butyl triethylammonium bis(trifluoromethane-sulfonyl) imide (N4222TFSI) was synthesized by using microwave and conventional methods. The structure of N4222TFSI was characterized by FT-IR,1H-NMR and13C-NMR. Its properties including viscosity, solubility, conductivity and density, were determined. Its applications as electrolyte and solvent for UV-VIS determination were also investigated.

Synthesis and Characterization of a Novel Ionic Liquid Based on N,N,N,N-tetramethylethylenediamine and its Application in the Synthesis of 1,8-dioxo-octahydro Xanthenes

2018 ◽  
Vol 21 (7) ◽  
pp. 526-532 ◽  
Author(s):  
Zahra Abdi Piralghar ◽  
Mohammad Mahmoodi Hashemi ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Chlorosulfonic Acid ◽  
Solvent Free ◽  
Aryl Aldehydes ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Solvent Free Conditions ◽  
Aryl Aldehyde ◽  
High Yields

Aim and Objective: In this work, we synthesized and characterized a novel Brönsted acidic ionic liquid from the reaction of N, N, N’, N’-tetramethylethylenediamine with chlorosulfonic acid and explored its catalytic activity in 1, 8-dioxo-octahydroxanthenes synthesis. Materials and Methods: Dimedone, aryl aldehydes, and the ionic liquid as the catalyst were reacted under solvent-free conditions. The progressive of the reaction was monitored by a thin layer of chromatography (ethyl acetate/n-hexane = 1/5). All products were characterized as the basis of their spectra data and melting point by comparison with those reported in the literature. Results: The prepared ionic liquid was successfully applied in the synthesis of 1, 8-dioxooctahydroxanthenes in good to high yields on the reaction of aryl aldehyde and dimedone at 120oC under solvent-free conditions. Conclusion: This research demonstrates that the catalyst is impressive for 1, 8-dioxo-octahydroxanthenes synthesis under solvent-free conditions.

Ultrasound-assisted aqua-mediated synthesis of multi-substituted tetrahydropyridine-3-carboxylates using N-carboxymethyl-3-pyridinium hydrogensulfate ([N-CH2CO2H-3-pic]+HSO4−) as a new efficient ionic liquid catalyst

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Kobra Nikoofar ◽  
Fatemeh Shahriyari
Keyword(s):  
Ionic Liquid ◽  
Reaction Times ◽  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
H Nmr ◽  
Sonic Waves ◽  
Ft Ir ◽  
High Yields ◽  
Work Up ◽  
C Nmr

AbstractA simple, straightforward, and ultrasound-promoted method for the preparation of some highly functionalized tetrahydropyridines reported via pseudo five-component reaction of (hetero)aromatic aldehydes, different anilines, and alkyl acetoacetates in the presence of [N-CH2CO2H-3-pic]+HSO4−, as a novel ionic liquid, in green aqueous medium. The IL was synthesized utilizing simple and easily-handled substrates and characterized by FT-IR, 1H NMR, 13C NMR, GC-MASS, FESEM, EDX, and TGA/DTG techniques. The procedure contains some highlighted aspects which are: (a) performing the MCR in the presence of aqua and sonic waves, as two main important and environmentally benign indexes in green and economic chemistry, (b) high yields of products within short reaction times, (c) convenient work-up procedure, (d) preparing the new IL via simple substrates and procedure.

Efficient pseudo five-component synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol) derivatives promoted by a novel ionic liquid catalyst

2018 ◽  
Vol 73 (3-4) ◽  
pp. 191-195 ◽  
Author(s):  
Zahra Abshirini ◽  
Abdolkarim Zare
Keyword(s):  
Ionic Liquid ◽  
Disulfonic Acid ◽  
Thermal Gravimetric ◽  
One Pot ◽  
Mild Conditions ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
The One ◽  
C Nmr

AbstractIn this research, initial production and characterization of a novel Brønsted-acidic ionic liquid, namely,N,N,N′,N′-tetramethylethylenediaminium-N,N′-disulfonic acid hydrogen sulfate ([TMEDSA][HSO4]2), has been described (characterization was achieved using Fourier-transform infrared spectroscopy,1H nuclear magnetic resonance (NMR),13C NMR, and mass and thermal gravimetric spectra). Thereafter, utilization of [TMEDSA][HSO4]2as a highly effectual catalyst for the synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol) derivatives through the one-pot pseudo five-component reaction of phenylhydrazine (2 eq.) with ethyl acetoacetate (2 eq.) and arylaldehydes (1 eq.) in relatively mild conditions, has been reported.

scholarly journals Synthesis of New Imidazolidine and Tetrahydropyrimidine Derivatives

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Hamid Beyzaei ◽  
Reza Aryan ◽  
Zahra Keshtegar
Keyword(s):  
Ring Opening ◽  
Reaction Times ◽  
Reaction Conditions ◽  
Ir Spectrometry ◽  
H Nmr ◽  
Chemical Structures ◽  
Thioamide Group ◽  
Solvent Free Conditions ◽  
Ft Ir ◽  
C Nmr

Synthesis of new imidazolidine and tetrahydropyrimidine derivatives 3a, b and 4a–c as cyclic 1,3-diamines under two reaction conditions (A and B) is described. Under reaction conditions-A, a suspension of (E)-2-cyano-2-(oxazolidin-2-ylidene)ethanethioamide 1 (1 eq.) and diaminoalkanes 2a–e (2 eq.) in absolute ethanol is heated under reflux for 16–22 h to afford 3a, b and 4a–c. Alternatively, under reaction conditions-B, a solution of thioamide 1 (1 eq.) in diaminoalkanes 2a–e (3 eq.) is stirred under solvent-free conditions at room temperature for 3 days to give desired products. Reaction conditions-A for having higher yields, shorter reaction times, and required less diamines is more effective than reaction conditions-B. Oxazolidine ring opening is observed by reacting compound 1 with all of the diamines 2a–e, but the thioamide group only reacts with nonbulky diamines 2a, b. The chemical structures of novel compounds were confirmed by 1H NMR, 13C NMR, elemental analysis, and FT-IR spectrometry.

Tetra-butylphosphonium arginine-based ionic liquid-promoted cyclization of 2-aminobenzonitrile with carbon dioxide

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15668-15673 ◽  
Author(s):  
Xian-Dong Lang ◽  
Shuai Zhang ◽  
Qing-Wen Song ◽  
Liang-Nian He
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Amino Groups ◽  
Solvent Free Conditions

Tetra-butylphosphonium arginine-based IL able to activate both amino-groups and CO2 proved to be an efficient and recyclable catalyst for the synthesis of quinazoline-2,4(1H,3H)-diones from 2-aminobenzonitriles and CO2 under solvent-free conditions.

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