Metal Triflate-Catalyzed Regio- and Stereoselective Friedel–Crafts Alkenylation of Arenes with Alkynes in an Ionic Liquid: Scope and Mechanism
作者:Mi Young Yoon、Jin Hong Kim、Doo Seoung Choi、Ueon Sang Shin、Jin Yong Lee、Choong Eui Song
DOI:10.1002/adsc.200700039
日期:2007.7.2
In the metal triflate-catalyzed hydroarylation of alkynes, employing an ionic liquid dramatically enhanced the catalytic activities, resulting in broadening the scope of substrates (arenes and alkynes). In some cases, even reactions that were not possible in conventional organic solvents proceeded smoothly in ionic liquids. Moreover, the ionic liquid phase containing catalyst could be readily recovered
在金属三氟甲磺酸酯催化的炔烃加氢芳基化中,采用离子液体显着增强了催化活性,从而扩大了底物(芳烃和炔烃)的范围。在某些情况下,甚至在常规有机溶剂中不可能发生的反应在离子液体中也能顺利进行。而且,通过在反应后简单地倾析有机层,可以容易地回收含离子液体的催化剂,并且可以将其重新用于随后的运行中而没有任何明显的活性损失。包括反应中间体的13 C NMR分析和同位素实验在内的机理研究首次证实,这种类型的反应是通过乙烯基阳离子中间体进行的。