Ruthenium(II)-catalysed Functionalisation of CH Bonds via a Six-membered Cyclometallate: Monoarylation of Aryl 2-pyridyl Ketones
作者:Bin Li、Christophe Darcel、Pierre H. Dixneuf
DOI:10.1002/cctc.201300752
日期:2014.1
Selective monoarylation of aryl 2‐pyridyl ketones with a variety of arylbromides via arene sp2 CH bond activation/functionalisation is achieved with a [RuCl2(p‐cymene)]2/ p‐CF3C6H4CO2H catalytic system. The reaction via a 6‐membered ruthenacycle is more difficult to perform than via a 5‐membered cyclometallate but the activation of only one ortho CH bond is unprecedentedly highly selective. A variety
芳基2-吡啶基酮的选择性单芳基化与多种芳基溴化物通过芳烃SP 2 ç H键活化/官能化与将[RuCl实现2(p -cymene)] 2 / p -CF 3 Ç 6 ħ 4 CO 2 ħ催化系统。通过六元钌循环进行反应比通过五元环金属盐进行反应更困难,但是只有一个邻位CH键的活化是前所未有的高度选择性。可以轻松获得各种功能性的2-吡啶衍生物。通过H / D交换表明,羧酸有利于可逆的CH键活化。