Diazotization of the amino group of 3-amino-4,6-dimethylpyrazolo[3,4-b]pyrimidines and subsequent replacement of the diazo group in the formed diazonium chlorides by an azide group gave the corresponding 3-azido derivatives. Their reactions with active methylene compounds have been studied. Substitution of the diazo group by a sulfo group gave the related 4,6-dimethylpyrazolo-[3,4-b]pyridyl-3-sulfonyl chlorides and sulfonylamides.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1556–1565, October, 2008.
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Dmitrieva, I.G., Dyadyuchenko, L.V., Strelkov, V.D. et al. Synthesis and transformations of substituted 4,6-dimethylpyrazolo[3,4-b]pyridyl-3-azides and -sulfonyl chlorides. Chem Heterocycl Comp 44, 1267–1274 (2008). https://doi.org/10.1007/s10593-009-0169-y
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DOI: https://doi.org/10.1007/s10593-009-0169-y