Catalytic Nazarov Cyclization: The State of the Art

The Nazarov reaction has been known for a long time. However, there were only a few catalytic Nazarov reactions reported until the early twenty-first century. Since then, the number of studies employing Nazarov chemistry has expanded considerably, with numerous reports of catalysis addressing synthetic problems associated with this transformation. This manuscript describes developments on catalysis of the Nazarov cyclization and variants thereof since 2005.