Recent synthetic developments in a powerful imino Diels-Alder reaction (Povarov reaction): application to the synthesis of N-polyheterocycles and related alkaloids

This review is devoted to the development in Povarov reaction and focuses on new efficient approaches based on this reaction to construct simple substituted (tetrahydro)quinolines and diverse N-polyheterocycles, including some alkaloids, which contain pyrroloquinoline or cyclopentaquinoline ring systems.