Visible Light-Induced [3+2] Annulation Reaction of Alkenes with Vinyl Azides: Direct Synthesis of Functionalized Pyrroles

A photocatalytic [3+2] annulation of alkenes with vinyl azides was developed under irradiation by visible light in the presence of organic dye photocatalysts. Broad substrate scope and high functional group tolerance were demonstrated by more than 50 examples. The reaction provides a novel and efficient method for the synthesis of polyfunctionalized pyrroles under very mild metal-free conditions without other additives.

Automated summary

A photocatalytic [3+2] annulation of alkenes with vinyl azides has been developed under visible light irradiation using organic dye photocatalysts. The reaction shows a broad substrate scope and high functional group tolerance in more than 50 examples. This method provides a novel and efficient approach for the synthesis of polyfunctionalized pyrroles under mild metal-free conditions without other additives.