Metal Catalysts for the Formation of Six-Membered N-Polyheterocycles

In recent decades, a large number of reports related to the synthesis of N-, O-, and S-containing heterocycles have appeared owing to a wide variety of their biological activity. The metal-catalyzed synthesis of heterocycles is becoming an important and highly rewarding protocol in organic synthesis. This review focuses on the use of metal as a catalyst for the synthesis of nitrogen containing six-membered polyheterocylces. It describes the formation of different types of heterocyclic rings using different metal catalysts.