Cholinium ionic liquids as cheap and reusable catalysts for the synthesis of coumarins via Pechmann reaction under solvent-free conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (44) ◽  
pp. 22946-22950 ◽  
Author(s):  
Yuehua Zhang ◽  
Anlian Zhu ◽  
Qianqian Li ◽  
Lingjun Li ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ethyl Acetoacetate ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Pechmann Reaction ◽  
Solvent Free Conditions

Ionic liquid [N112OH][HSO4] was found to be an efficient and reusable catalyst for Pechmann reaction under solvent-free conditions. UV-vis studies suggested that the high catalytic performance of this catalyst was mainly due to its ability to increase the content of keto tautomer of ethyl acetoacetate.

scholarly journals Biocompatible ionic liquid [Betaine][H2PO4] as a reusable catalyst for the substitution of xanthen-9-ol under solvent-free conditions

RSC Advances ◽  
2020 ◽  
Vol 10 (52) ◽  
pp. 31662-31669
Author(s):  
Anlian Zhu ◽  
Tong Wang ◽  
Wanlu Feng ◽  
Jianji Wang ◽  
Lingjun Li
Keyword(s):  
Ionic Liquid ◽  
Substitution Reaction ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Solvent Free Conditions ◽  
Direct Substitution

A cheap and biocompatible ionic liquid [Betaine][H2PO4] was found to be an efficient and reusable catalyst for the direct substitution reaction of xanthen-9-ol under solvent-free conditions.

ChemInform Abstract: Cholinium Ionic Liquids as Cheap and Reusable Catalysts for the Synthesis of Coumarins via Pechmann Reaction under Solvent-Free Conditions.

ChemInform ◽  
2014 ◽  
Vol 46 (2) ◽  
pp. no-no
Author(s):  
Yuehua Zhang ◽  
Anlian Zhu ◽  
Qianqian Li ◽  
Lingjun Li ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Solvent Free ◽  
Pechmann Reaction ◽  
Solvent Free Conditions

Direct oxidative amidation of aldehydes with amines catalyzed by heteropolyanion-based ionic liquids under solvent-free conditions via a dual-catalysis process

2016 ◽  
Vol 14 (5) ◽  
pp. 1784-1793 ◽  
Author(s):  
Renzhong Fu ◽  
Yang Yang ◽  
Jin Zhang ◽  
Jintao Shao ◽  
Xuming Xia ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Dual Catalysis ◽  
Oxidative Amidation ◽  
Catalysis Process

A heteropolyanion-based ionic liquid catalyzed oxidative amidation of aldehydes with amines via a dual-catalysis pathway has been reported.

Ionic Liquid Catalyzed Efficient Regioselective Synthesis of 1,4- Disubstituted 1,2,3-Triazoles under Metal and Solvent free Conditions

2020 ◽  
Vol 07 ◽  
Author(s):  
Abid H. Banday ◽  
Victor J. Hruby
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Regioselective Synthesis ◽  
Chromatographic Separations ◽  
One Pot ◽  
Green Protocol ◽  
Metal Free ◽  
Organic Azides ◽  
Solvent Free Conditions

Background: Unprecedented, one-pot regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles through azide- aldehyde (3+2) organo-click cycloaddition under metal and solvent-free conditions, is described. Objective: Solvent and metal free synthesis of biologically and industrially important triazoles. Methods: Efficient and high yielding synthesis of products avoiding the tedious high solvent workups and chromatographic separations. The synthesis doesn’t involve the routine acetylenes which are very costly but instead cheaper starting materials like aldehydes and organic azides are used. Results: Green protocol based on the catalysis through Ionic Liquids which simultaneously act as solvents. The products are obtained in good to excellent yields in hassle free synthesis. Conclusion: Efficient and green synthesis of structurally and biologically important triazoles.

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