Abstract
Complexation of 4-nitropyridine N-oxides with ν- (BF3, HCl) and π-acceptors (tetracyanoethylene, chloranil, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, 7,7,8,8-tetracyanoquinodimethane) activates the nitro group to nucleophilic replacement by chlorine. Adducts formed by 4-nitropyridine and 4-nitroquinoline N-oxides with boron trifluoride and hydrogen chloride were studied by IR spectroscopy. It was shown that these complexes belong to the n,ν type and that the donor-acceptor interaction therein involves the oxygen atom of the N-oxide group.
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Original Russian Text © Ya.P. Nizhnik, V.P. Andreev, B.Z. Belashev, 2008, published in Zhurnal Organicheskoi Khimii, 2008, Vol. 44, No. 12, pp. 1851–1857.
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Nizhnik, Y.P., Andreev, V.P. & Belashev, B.Z. Molecular complexes of 4-nitropyridine and 4-nitroquinoline N-oxides with boron trifluoride and hydrogen chloride as intermediates in SNAr reactions. Russ J Org Chem 44, 1824–1830 (2008). https://doi.org/10.1134/S1070428008120191
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DOI: https://doi.org/10.1134/S1070428008120191