Metal catalysts: applications in higher-membered N-heterocycles synthesis

In recent decades, a large number of reports related to 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 heterocycles. It describes the formation of higher-membered heterocyclic rings.