- Thiadiazoles and Dihydrothiadiazoles. Part 5. Synthesis of 2,3-Dihydro-1,3,4-thiadiazoles by Reaction of Aldehydes or Ketones with Thioaroylhydrazines
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A general method for the synthesis of 2,5- and 2,2,5-substituted 2,3-dihydro-1,3,4-thiadiazoles is described, involving the condensation of aldehydes or ketones with thioaroylhydrazines.Evidence for the cyclic nature of the products is discussed.The react
- Evans, D. Michael,Hill, Lawrence,Taylor, David R.,Myers, Malcolm
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p. 1499 - 1506
(2007/10/02)
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- 2-PHENYL-1,3,4-THIADIAZOL-2-INES
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According to data from the 1H and 13C NMR spectra in nonpolar media and the mass spectra, alkylidene derivatives of thiobenzhydrazide have a 1,3,4-thiadiazol-2-ine structure rather than a thiobenzhydrazone structure.The products of condensation of thioben
- Zelenin, K. N.,Khrustalev, V. A.,Alekseev, V. V.,Sharbatyan, P. A.,Lebedev, A. T.
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p. 683 - 689
(2007/10/02)
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- SEMICARBAZONES AND THIOSEMICARBAZONES OF THE HETEROCYCLIC SERIES. XLIV. CYCLIZATION OF ISATIN AND 1-ACETYLISATIN 3-THIOBENZOYLHYDRAZONES
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Isatin 3-thiobenzoylhydrazone undergoes cyclization with the addition of the sulfur atom to the C3 atom and closure of the thiadiazole ring.In contrast, 3-thioaroylhydrazones of 1-acetylisatin undergo cyclization with participation of C2 and close the thiadiazine ring with the formation of derivatives of the new heterocyclic system thiadiazinoindole.
- Tomchin, A.B.
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p. 504 - 510
(2007/10/02)
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