新型Brnsted酸性离子液体催化二氧化碳与环氧化合物偶联反应（英文）

Coupling of epoxides and carbon dioxide catalyzed by Brnsted acid ionic liquids

设计合成了一系列由碳链长度可调节的Brnsted酸中心阳离子及Lewis碱中心阴离子构成的酸性离子液体,,并应用于二氧化碳与环氧化合物的偶联反应合成环碳酸酯.考察了离子液体结构以及温度、压力和催化剂用量等参数的影响.结果表明,具有长碳链的离子液体表现出高催化活性及可重复使用性能.离子液体的酸性影响催化活性.

A series of Bronsted acid ionic liquids （BAILs） containing a long chain Br？nsted acid site in the cati‐onic part and a Lewis basic site in the anionic part were designed, synthesized, and used as catalyst for the coupling of epoxides and carbon dioxide to cyclic carbonates without a co‐catalyst or co‐solvent. The effects of catalyst structure and other parameters on the catalytic performance were investigated. The long chain 2‐（N,N‐dimethyldodecylammonium） acetic acid bromide （[（CH2COOH）DMDA]Br） showed high catalytic activity and good reusability. This protocol was ex‐panded to various epoxides, which gave the corresponding cyclic carbonates in good yields. The acidity of the catalyst influenced its catalytic activity.