A novel copper-catalyzed direct C-N formation reaction of simplearenes with cheap and pharmacological saccharin derivatives under relatively mild conditions was developed with arenes as limiting reagents. This work provided a new method for oxidativecoupling of aromatic C(sp2)-H bonds and N-H bonds.
Here, we report a practical C-H imidation of five-membered heterocycles under metal-free conditions. We also report the first dual C-H bond aminobromination of thiophenes, with benzotriazole, saccharin, 1,2,4-triazole, benzimidazole, pyrazole, 4-bromopyrazole, 5-methyltetrazole, and dibenzenesulfonimides as effective amine sources. Mechanistic studies support the radical pathway of the imidation and aminobromination reactions.