In 2023, a metal-free, visible-light-mediated cascade reaction was developed from 2isocyanoaryl thioethers 64 (Scheme 22) . This approach utilizes hydrazines as radical precursors, providing efficient access to a range of 2-aryl and 2-alkyl benzothiazoles 65 in high yields. Initially, phenyl hydrazine reacts with eosin Y 18 under visible-light irradiation to generate aryl radical A. This radical adds to the isocyanide moiety, yielding imidoyl radical intermediate B, which undergoes intramolecular cyclization to form the benzothiazole product 65 (R 1 = H, R 3 = Ph). Simultaneously, the benzyl radical C formed during the reaction is converted to 1,2-diphenylethane by-product. This efficient methodology underscores its potential for synthesizing structurally diverse benzothiazoles with broad applicability.