Aza‐Crown Ether Complex Cation Ionic Liquids: Preparation and Applications in Organic Reactions. Issue 40 (22nd August 2014)

• Record Type: Journal Article
• Authors: Song, Yingying; Cheng, Chen; Jing, Huanwang
• Is Part Of: Chemistry. Volume 20:Issue 40(2014)
• Page Start: 12894
• Page End: 12900
• Publication Date: 2014-08-22
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201403118
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Aza‐crown ether complex cation ionic liquids (aCECILs) were devised, fabricated, and characterized by using NMR spectroscopy, MS, thermogravimetric differential thermal analysis (TG‐DTA), elemental analysis and physical properties. These new and room‐temperature ILs were utilized as catalysts in various organic reactions, such as the cycloaddition reaction of CO₂ to epoxides, esterification of acetic acid and alcohols, the condensation reaction of aniline and propylene carbonate, and Friedel–Crafts alkylation of indole with aldehydes were investigated carefully. In these reactions, the ionic liquid exhibited cooperative catalytic activity between the anion and cation. In addition, the aza‐[18‐C‐6HK][HSO₄]₂ was the best acidic catalyst in the reactions of esterification and Friedel–Crafts alkylation under mild reaction conditions.</p> </abstract>