Metal-Free, Visible-Light-Promoted Decarboxylative Radical Cyclization of Vinyl Azides with <i>N</i>‑Acyloxyphthalimides

A visible-light-mediated decarboxylative cyclization of <i>N</i>-acyloxylphthalimides with vinyl azides has been developed under metal-free conditions. This protocol features mild conditions, a broad substrate scope, and an excellent functional group tolerance, thus providing a facile and efficient access to substituted phenanthridines. Control experiments revealed that the reaction proceeded via a radical process