Synthesis of 1‐Pyrroline by Denitrogenative Ring Expansion of Cyclobutyl Azides under Thermal Conditions

Abstract We herein report an efficient and systematic synthesis of 1‐pyrrolines from cyclobutyl azides under thermal and neutral conditions. The reaction proceeded without any additional reagents, and nitrogen was generated as the sole by‐product. Furthermore, the generated 1‐pyrrolines could be continuously transformed into pyrroles, N‐Boc‐amines, and oxaziridines in an one‐pot manner. magnified image