Cooperative Friedel–Crafts Alkylation of Electron‐Deficient Arenes via Catalyst Activation with Hexafluoroisopropanol**
作者:Sanjay Singh、Sankalan Mondal、Vikas Tiwari、Tarak Karmakar、Chinmoy Kumar Hazra
DOI:10.1002/chem.202300180
日期:2023.3.28
Herein, we report the challenging and scantily explored Friedel-Crafts alkylation of electron-deficient arenes using a “catalyst activation” approach. Through strong hydrogen bonding with solvent hexafluoroisopropanol (HFIP) the Brønsted acidity of the catalyst is increased which stabilizes the transition states of the Friedel-Crafts reaction via concerted mechanism.
在此,我们报告了使用“催化剂活化”方法对缺电子芳烃进行具有挑战性且探索不足的 Friedel-Crafts 烷基化。通过与溶剂六氟异丙醇 (HFIP) 的强氢键结合,催化剂的 Brønsted 酸度增加,从而通过协同机制稳定 Friedel-Crafts 反应的过渡态。