Sodium Sulfite-Involved Photocatalytic Radical Cascade Cyclization of 2-Isocyanoaryl Thioethers: Access to 2-CF₂/CF₃-Containing Benzothiazoles

Abstract

A visible-light-induced radical cascade cyclization of 2-isocyanoaryl thioethers for the synthesis of 2-CF₂/CF₃-containing benzothiazoles has been developed. Sodium sulfite can participate in the photocatalytic cycle as a reductant that efficiently transforms Ir⁴⁺ into Ir³⁺ to promote the fluoroalkylation under mild reaction conditions.