arylation of anilines with non-activated aryl halides has been achieved by a metalla-tautomerism approach. The reactivity of an aniline towards a palladium catalyst was relayed from the NH group into the aromatic ring. Out of four possible positions, the catalytic arylation was directed exclusively into the para-C−H position by a bulky ligand at the palladium in combination with a temporarily installed shielding
通过
金属互变异构方法实现了
苯胺与非活化芳基卤化物的选择性对-C-H芳基化。
苯胺对
钯催化剂的反应性从 NH 基团转移到芳环中。在四个可能的位置中,催化芳基化通过
钯上的大
配体与临时安装的屏蔽基团的组合专门定向到对位-C-H位置。