Abstract
A series of o-nitroarenes such as 2-nitrobenzaldehydes, 2’-nitroacetophenone, N-(2nitrobenzylidene)anilines, or 2-nitrophenylazobenzenes was examined for reductive cyclizations by applying 2-bromo-2-nitropropane/Zn, SmI2, or cathodic electrolysis. Chemical or electrochemical reactions of o-nitroarenes involving electron transfer processes were found to give heterocycles such as 2,1-benzisoxazoles, or benzotriazoles in excellent yields. Electrolysis of 2-nitrophenylazobenzenes produced benzotriazole N-oxides or benzotriazoles exclusively depending upon the reaction condition.
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© 1998 Springer Japan
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Kim, B.H., Lee, Y.S., Choi, Y.R., Kim, S.K., Jun, Y.M., Baik, W. (1998). Chemical and Electrochemical Reductive Cyclizations of O-Nitroarenes Toward Nitrogen Containing Heterocycles. In: Torii, S. (eds) Novel Trends in Electroorganic Synthesis. Springer, Tokyo. https://doi.org/10.1007/978-4-431-65924-2_97
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DOI: https://doi.org/10.1007/978-4-431-65924-2_97
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