A method for the synthesis of novel 1H-pyrazol-1-yl-1,2,3-thiadiazole derivatives has been proposed and their intramolecular cyclization to pyrazolo[1,5-a][1,2,3]thiadiazolo[4,5-e]pyrimidin-4(5H)-ones, previously unknown fused tricyclic heterocycles, has been studied.
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This work was supported by the Russian Science Foundation (grant 16-16-04022). 1H and 13С NMR spectra were registered in the
Laboratory of Complex Studies and Expert Evaluation of Organic Materials at the Center for Collective Use of the Ural Federal University.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2018, 54(11), 1079–1082
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Vysokova, O.А., Kalinina, T.A., Slepukhin, P.А. et al. Synthesis of 5-(5-amino-1H-pyrazol-1-yl)-1,2,3-thiadiazole-4-carboxylic acid ethyl esters and their cyclization into pyrazolo[1,5-a][1,2,3]thiadiazolo[4,5-e]pyrimidin-4(5H)-ones. Chem Heterocycl Comp 54, 1079–1082 (2018). https://doi.org/10.1007/s10593-018-2396-6
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DOI: https://doi.org/10.1007/s10593-018-2396-6