Construction of Functionalized 2,3-Dihydropyrroles via Visible-Light-Driven Formal [3 + 2] Cycloaddition

In recent years, a photoredox catalysis strategy has emerged as a powerful platform for generating open-shell intermediates under mild conditions, enabling the development of novel radical-based transformations that are difficult to achieve via traditional ionic pathways. Among these, radical-mediated cyclization reactions allow for the rapid and modular assembly of complex molecular scaffolds. Herein, we report a visible-light-driven formal [3 + 2] cycloaddition reaction of electron-deficient 1,3-conjugated enynes and α-silylamines. This reaction provides a practical route to highly functionalized 2,3-dihydropyrroles under mild and redox-neutral conditions with operational simplicity and a broad substrate scope.