We present the results of our study towards the synthesis of 2,3-disubstituted 7-azaindoles by cyclization of 2-pyridylhydrazones of aliphatic and alkylaromatic ketones under the conditions of Fischer reaction, catalyzed by polyphosphoric acid.
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This work received financial support from the Russian Foundation for Basic Research (grant 14-03-31289).
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*Dedicated to Academician of the Russian Academy of Sciences Yu. N. Bubnov on the occasion of his 80th birthday.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1416-1427, September, 2014.
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Alekseyev, R.S., Amirova, S.R., Kabanova, E.V. et al. The Fischer Reaction in the Synthesis of 2,3-Disubstituted 7-Azaindoles*. Chem Heterocycl Comp 50, 1305–1315 (2014). https://doi.org/10.1007/s10593-014-1593-1
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DOI: https://doi.org/10.1007/s10593-014-1593-1