In 2011, a one-pot synthesis of benzothiazoles 32 (R = H, p-Cl, p-OMe) from benzylamines was developed (Scheme 7, method a) . This protocol involves oxidative coupling to form imines, followed by intramolecular cycloaddition and subsequent oxidation to yield the target compounds. The process, catalyzed by mpg-C3N4 15, avoids the use of metals or organic oxidizing agents. However, the protocols main limitation is the requirement for high reaction temperature about 100°C, and only three products were reported. Recent advancements have addressed these limitations with more efficient methods . Baskar et al. introduced a protocol using 0.9% Badoped CoMoO4 nanoparticles 7 as a reusable and scalable catalyst under visible-light conditions, employing air as the oxidant (Scheme 7, method b) . This approach provided benzothiazoles 32 (R = H, p-iPr, p-OMe, o-Me, Ph, m-OPh, m-OH-p-OMe, p-Cl, p-F, o-F, m,p-diCl) with high efficiency. A representative mechanistic pathway is provided from a related work (Scheme 7, method c), in which benzothiazoles 32 (R = H, p-tBu, p-Cl, p-F, p-OMe) are synthesized via benzylamine oxidation. In this process, singlet oxygen generated by the excited photocatalyst oxidizes benzylamine to form the radical cation intermediate A. Further oxidation produces benzyl imine cation B, which reacts with the hydroperoxide radical. Hydrolysis of the resulting intermediate affords benzaldehyde, which couples with 2-aminothiophenol to form imine intermediate C. Intramolecular cyclization of C generates dihydrobenzothiazole D, which is oxidized in the presence of rose bengal 19 to yield the final benzothiazole product via intermediates E and F. Scheme 7. Synthesis of benzothiazoles 32 using benzylamines.