Visible Light‐Induced Metal‐Free and Oxidant‐Free Radical Cyclization of (2‐Isocyanoaryl)(methyl)sulfanes with Ethers

Abstract

Abstract A novel cascade cyclization of (2‐isocyanoaryl) (methyl)sulfanes and ethers is developed. With 4CzIPN as a photocatalyst and the irradiation of blue LED light, ether radicals are efficiently generated without adding any oxidant, endowing the strategy with features of oxidant‐free, metal‐free, mild reaction conditions, and operational simplicity. This strategy provides efficient approach to access various ether‐containing benzothiazoles in acceptable to good yields.