Synthesis of heterocycles via intramolecular annulation of nitrene intermediates

This article presents a comprehensive review of synthetically useful intram olecular annulation reactions of nitrene and nitrenoid intermediates leadin g to heterocyclic compounds. Thermal, photochemical, and metal mediated rea ctions of aryl- and vinylazides, azirines, nitroso, and nitro compounds lea ding to synthetically useful yields of heterocycles an discussed.