Abstract
It is shown that the condensation of 2,3-dichloro-p-benzoquinone with N-alkyl(aryl)-β-aminocrotonic acid esters leads, depending on the conditions and the nature of the substituent attached to the nitrogen of the aminocrotonic ester, either to substituted dichlorohydroquinones or to 5-hydroxy-6,7-dichloroindole derivatives. The latter are oxidized by nitric acid to the corresponding o-quinones.
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See [8] for communication XLIX.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 335–338, March, 1971
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Grinev, A.N., Uretskaya, G.Y. & Liberman, S.F. Quinones. Chem Heterocycl Compd 7, 309–312 (1971). https://doi.org/10.1007/BF00944409
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DOI: https://doi.org/10.1007/BF00944409