Palladium‐Catalyzed Carbonylative Synthesis of N‐Heterocycles from 1‐Chloro‐2‐fluorobenzenes

A simple and efficient synthesis of pyrido‐fused quinazolinones and dibenzoxazepinones by palladium‐catalyzed annulation of commercially available substituted 1‐chloro‐2‐fluorobenzenes and 2‐aminopyridines or 2‐aminophenols has been developed. The reaction involves carbonylation/aromatic nucleophilic substitution sequential in a one‐pot manner.