Pd-Catalyzed C(sp2)–H Imidoylative Annulation: A General Approach To Construct Dibenzoox(di)azepines

A general method to construct the scaffolds of dibenzooxazepine and dibenzodiazepine, through Pd-catalyzed isocyanide insertion and intramolecular C(sp2)-H activation, has been developed. This is the first example of seven-membered heterocycle formation by C-H imidoylative annulation.