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The selective synthesis of -arylbenzene-1,2-diamines or 1-arylbenzimidazoles by irradiating 4-methoxy-4'-substituted-azobenzenes in different solvents.
RSC Adv
February 2021
Department of Chemical Engineering, National Taiwan University of Science and Technology Taiwan
The solvent-controllable photoreaction of 4-methoxyazobenzenes to afford 1-aryl-1-benzimidazoles or -arylbenzene-1,2-diamines has been studied. The irradiation of 4-methoxyazobenzenes in DMF containing 0.5 M hydrochloric acid provided -aryl-4-methoxybenzene-1,2-diamines as the major product, while irradiation in acetal containing 0.
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