4-Aryl-2-methylaminothiazoles and 5-aryl-2-mercapto-1-methylimidazoles, containing a fragment of 1,3-dimethylbarbituric acid, have been synthesized by the one-pot three-component condensation of 1,3-dimethylbarbituric acid, arylglyoxal hydrates, and N-methylthiourea. The analogous reaction involving N-arylthioureas proceeds regioselectively with the formation of 4-aryl-2-arylaminothiazoles. It was established that in the crystalline state 5-aryl-2-mercaptoimidazoles exist in the imidazoline-2-thione form.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1941-1947, December, 2012.
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Kolos, N.N., Zamigailo, L.L., Chechina, N.V. et al. Three-component condensation of 1,3-dimethyl-barbituric acid, arylglyoxals, and substituted thioureas. Chem Heterocycl Comp 48, 1817–1823 (2013). https://doi.org/10.1007/s10593-013-1214-4
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DOI: https://doi.org/10.1007/s10593-013-1214-4