Ionic Liquids Catalyzed Friedel–Crafts Alkylation of Substituted Benzenes with CCl4 Toward Trichloromethylarenes
作者:Xinyu Lyu、Wencheng Wang、Yiqun Sun、Qian Zhao、Tao Qiu
DOI:10.1007/s10562-018-2633-8
日期:2019.3
An ionic liquid catalyzed Friedel–Crafts alkylation reaction of substituted benzenes with CCl4 was developed. The reaction proceeded efficiently under mild conditions, gave corresponding trichloromethylarenes with diversity functional groups in moderate to good yields. The influence of Lewis acidity of ionic liquids on the conversion of the alkylation reaction has been investigated. Notably, the probable
开发了一种离子液体催化的取代苯与四氯化碳的 Friedel-Crafts 烷基化反应。该反应在温和条件下有效进行,以中等至良好的收率得到相应的具有多样性官能团的三氯甲基芳烃。研究了离子液体路易斯酸度对烷基化反应转化率的影响。值得注意的是,该反应的可能机制已在 27Al NMR 光谱的帮助下提出。值得注意的是,EmimCl-AlCl3 中 [Al2Cl7]- 物种占优势,N = 0.67 可以通过 27Al NMR 光谱分析检测到,并且 [AlCl4]- 在反应开始时生成。此外,还发现当反应完成时,[AlCl4]- 可以转化为 [Al2Cl7]-。