Abstract
Due to intramolecular hydrogen bonding between the amino and nitro groups, o-nitroaniline is incapable of forming Schiff bases in the reactions with acetaldehyde and crotonaldehyde but is converted to quinoline derivative under Doebner–Miller reaction conditions via addition to the C=C double bond of the α,β-unsaturated aldehyde. Under analogous conditions, p-nitroaniline possessing a free amino group gives rise to the product of Doebner–Miller quinoline synthesis through intermediate formation of Schiff base dimer. The reaction of p-nitroaniline with benzaldehyde also yields the corresponding Schiff base, whereas o-nitroaniline is converted to N-benzyl derivative.
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Original Russian Text © V.Ya. Denisov, T.N. Grishchenkova, T.B. Tkachenko, S.V. Luzgarev, 2016, published in Zhurnal Organicheskoi Khimii, 2016, Vol. 52, No. 12, pp. 1806–1812.
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Denisov, V.Y., Grishchenkova, T.N., Tkachenko, T.B. et al. Reaction of nitroanilines with aldehydes. Refinement of the Doebner–Miller reaction mechanism. Russ J Org Chem 52, 1797–1803 (2016). https://doi.org/10.1134/S1070428016120150
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DOI: https://doi.org/10.1134/S1070428016120150