Photochemical cyclization of ortho-substituted benzene derivatives to the corresponding benzimidazole, indazole, benzoxazole, and benzofuran ring systems is described.
J. P. Ferris and F. R. Antonucci, J. Chem. Soc., Chem. Commun., 1972, 126 DOI: 10.1039/C39720000126
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