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Aza-Crown Ether Complex Cation Ionic Liquids: Preparation and Applications in Organic Reactions

机译:氮杂-冠醚复合阳离子液体:制备及其在有机反应中的应用

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摘要

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 CO_2 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][HSO_4]_2 was the best acidic catalyst in the reactions of esterification and Friedel–Crafts alkylation under mild reaction conditions.
机译:通过使用核磁共振波谱,质谱,热重差热分析(​​TG-DTA),元素分析和物理性质,设计,制造并表征了氮杂-冠醚络合物阳离子离子液体(aCECIL)。这些新型的室温离子液体在各种有机反应中用作催化剂,例如CO_2与环氧化物的环加成反应,乙酸和醇的酯化,苯胺与碳酸亚丙酯的缩合反应以及吲哚与对醛进行了仔细的研究。在这些反应中,离子液体在阴离子和阳离子之间表现出协同的催化活性。此外,在温和的反应条件下,在酯化反应和Friedel-Crafts烷基化反应中,氮杂-[18-C-6HK] [HSO_4] _2是最佳的酸性催化剂。

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