Palladium-Catalyzed Selective Aryl Ring C-H Activation of<i>N</i>-Acyl-2-aminobiaryls: Efficient Access to Multiaryl-Substituted Naphthalenes
作者:Pratheepkumar Annamalai、Wu-Yin Chen、Selvam Raju、Kou-Chi Hsu、Nitinkumar Satyadev Upadhyay、Chien-Hong Cheng、Shih-Ching Chuang
DOI:10.1002/adsc.201600488
日期:2016.11.17
Palladium‐catalyzed cycloaromatization of N‐acyl‐2‐aminobiaryls, through a sequence of ortho C−H bond activation/alkyne insertion/meta C−H bond activation/alkyne insertion, was developed. An efficient synthesis of multiaryl‐substituted naphthalenes, N‐[2‐(5,6,7,8‐tetraarylnaphthalen‐1‐yl)aryl]acetamides, was demonstrated using molecular oxygen as the sole oxidant. Furthermore, through Buchwald's synthetic
通过一系列邻位CH键活化/炔烃插入/间位CH键活化/炔烃插入的过程,开发了N-酰基-2-氨基联芳基的钯催化环芳构化。使用分子氧作为唯一的氧化剂,证明了多芳基取代的萘,N- [2-(5,6,7,8-四芳基萘-1-基)芳基]乙酰胺的有效合成。此外,通过布赫瓦尔德(Buchwald)的合成方案,通过分子内C-N键的形成,两种化合物以30–40%的产率转化为相应的荧光咔唑。