Abstract
It was established by the method of intramolecular competition during the formation of an indole ring from N,N-diarylhydrazones in acidic media that aryl groups with p-ethoxycarbonyl or m-methoxy groups are less reactive than unsubstituted phenol, whereas the 2-naphthyl group is more reactive than the phenyl group. The results are examined from the point of view of the qualitative classification of the substituents with respect to their electronic effects.
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See [1] for communication I.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1072–1078, August, 1977.
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Zagorevskii, V.A., Kucherova, N.F. & Sharkova, N.M. Investigation of the Fischer cyclization of diarylhydrazones and related secondary hydrazones. Chem Heterocycl Compd 13, 862–867 (1977). https://doi.org/10.1007/BF00488911
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DOI: https://doi.org/10.1007/BF00488911