Abstract
Cyclocondensation of chalcones with 5-amino-3-methyl-1-phenylpyrazole leads to the formation of 2,4-diaryl-5-methyl-7-phenyl-3,4-dihydropyrazolo-[4,5-b]pyridines, which undergo aromatization upon treatment with N-bromosuccinimide.
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S. V. Tabak, I. I. Grandberg, and A. N. Kost, Khim. Geterotsikl. Soedin., 1, 116 (1965).
A. N. Kost, Khim. Geterotsikl. Soedin., 9, 1200 (1980).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1247–1251, September, 1987.
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Orlov, V.D., Kiroga, K. & Kolos, N.N. Synthesis of aromatic pyrazolo[4,5-b]pyridine derivatives. Chem Heterocycl Compd 23, 997–1001 (1987). https://doi.org/10.1007/BF00475369
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DOI: https://doi.org/10.1007/BF00475369