Successive reaction of cyanothioacetamide with aliphatic or aromatic aldehydes, formaldehyde, and primary amines gives the corresponding 3,7-disubstituted 3,4,7,8-tetrahydro-2H,6H-pyrimido-[4,3-b][1,3,5]thiadiazine-9-carbonitriles.
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*For Communication 12, see [1].
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 689-697, April, 2012.
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Dotsenko, V.V., Frolov, K.A. & Krivokolysko, S.G. Mannich reaction in the synthesis of N,S-containing heterocycles. 13*. One-pot method for preparing pyrimido[4,3-b]-[1,3,5]thiadiazines by reaction of aldehydes, cyanothioacetamide, formaldehyde, and primary amines. Chem Heterocycl Comp 48, 642–649 (2012). https://doi.org/10.1007/s10593-012-1038-7
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DOI: https://doi.org/10.1007/s10593-012-1038-7