Synthesis of gem‐Difluorinated Spiro‐γ‐lactam Oxindoles by Visible‐Light‐Induced Consecutive Difluoromethylative Dearomatization, Hydroxylation, and Oxidation

: Described herein is a protocol for visible-light-induced consecutive synthesis of gem-difluorinated spiro-γ-lactam oxindoles under mild conditions by means of a process involving sequential radical difluoromethylative dearomatization, hydroxylation, and oxidation. The protocol features high chemo- and regioselectivity, good functional group tolerance, and easy scalability. Several of the functionalized spirooxindole products showed good fungicidal activity, suggesting that they have potential agrochemical applications.