63281-62-9Relevant articles and documents
Aza-crown ether complex cation ionic liquids: Preparation and applications in organic reactions
Song, Yingying,Cheng, Chen,Jing, Huanwang
, p. 12894 - 12900 (2015/03/30)
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. Jewel in the crown: Nine new and room-temperature aza-crown ether complex ionic liquids (aCECILs) composed of multiple cations and anions were fabricated through a convenient procedure (see scheme). Some of them were used as catalysts in various organic reactions, such as the cycloaddition reaction of CO2 to propylene oxide, esterification of acetic acid and alcohols, the condensation of aniline and propylene carbonate, and Friedel-Crafts alkylation of indole with aldehydes.
Side Arm Effects on Cation Binding, Extraction, and Transport Functions of Oligopyridine-Functionalized Aza-Crown Ethers
Tsukube, Hiroshi,Uenishi, Jun'ichi,Higaki, Hiromi,Kikkawa, Ken'ichi,Tanaka, Takakazu,et al.
, p. 4389 - 4397 (2007/10/02)
A new series of lariat ethers and double-armed crown ethers was prepared in which oligopyridine-functionalized side arms were attached as secondary donor sites.A novel preparative method of oligopyridine derivatives was successfully applied to the synthes
