Paper
SN H Arylamination of 3-Nitropyridine: A Competitive Formation of 2-Arylamino-5-nitropyridines and 2-Arylamino-5-nitrosopyridines
Published Jun 19, 2018 · I. Borovlev, O. Demidov, Gulminat A. Amangasieva
Synthesis
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Abstract
Abstract Arylamination of 3-nitropyridine via the nucleophilic substitution of hydrogen leads to a mixture of 2-arylamino-5-nitropyridines and novel 2-arylamino-5-nitrosopyridines, with the latter as the major product. The proposed mechanism includes the formation of σH-adducts and their further aromatization proceeding either through an oxidative pathway or intramolecular Red/Ox pathway of the SN H reaction. Moreover, we have shown that nitroso compounds can be selectively oxidized with m-chloroperbenzoic acid to give the corresponding nitro derivatives or their N-oxides, depending on the reaction temperature and the amount of oxidant.
Arylamination of 3-nitropyridine leads to the formation of 2-arylamino-5-nitrosopyridines and their oxidative oxidation with m-chloroperbenzoic acid, depending on reaction temperature and oxidant concentration.
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