C−O Activation by a Rhodium Bis(N-Heterocyclic Carbene) Catalyst: Aryl Carbamates as Arylating Reagents in Directed C−H Arylation
作者:Mamoru Tobisu、Kosuke Yasui、Yoshinori Aihara、Naoto Chatani
DOI:10.1002/anie.201610409
日期:2017.2.6
derivatives with the C−H bonds of arenes have met with limited success. Herein, we report the rhodium‐catalyzed cross‐coupling of aryl carbamates with arenes bearing a convertible directing group. The key to success is the use of an in situ generated rhodium bis(N‐heterocyclic carbene) species as the catalyst, which can promote activation of the inert C(sp2)−O bond in aryl carbamates.
尽管最近在惰性苯酚衍生物作为芳基卤化物和三氟甲磺酸酯的替代物的催化转化方面取得了进展,但尝试将惰性苯酚衍生物与芳烃的CH键进行交叉偶联的尝试取得了有限的成功。本文中,我们报道了铑催化的氨基甲酸芳基酯与带有可转换导向基团的芳烃的交叉偶联。成功的关键是使用原位生成的铑双(N-杂环卡宾)物种作为催化剂,它可以促进氨基甲酸芳基酯中惰性C(sp 2)-O键的活化。