- Synthesis and crystal structures of new 1,4-disubstituted 1,2,4-triazoline-5-thiones
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Introduction of sulfur into the 5-position of 1,4-disubstituted quaternary 1,2,4-triazolium salts (1-9; Cl, Br, I, BF4, PF6, CH3OSO3 were used as anions) by two methods was investigated. The syntheses of nine 1,
- Laus, Gerhard,Kahlenberg, Volker,Wurst, Klaus,Schottenberger, Herwig
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p. 950 - 964
(2015/06/16)
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- A new synthetic method for substituted 2,4-dihydro-3H-1,2,4-triazol-3-ones and 3-thiones via 1,4-dialkyl-5-phenylthio-1H-1,2,4-triazolium salts
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Novel 2,4-di- and 2,4,5-trialkyl-2,4-dihydro-3H-1,2,4-triazol-3-ones and 2,4-dialkyl-2,4-dihydro-3H-1,2,4-triazole-3-thiones were prepared by the reaction of 1,4-dialkyl-5-phenylthio-1,2,4-triazolium salts with aqueous potassium carbonate or sodium sulfide in DMF, respectively.
- Kawasaki, Ikuo,Domen, Akane,Kataoka, Shin-ya,Yamauchi, Kazuya,Yamashita, Masayuki,Ohta, Shunsaku
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p. 351 - 363
(2007/10/03)
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- A Study of the Behaviour of 2,4-Substituted Thiosemicarbazides toward Orthoesters: Formation of Mesoionic Compounds
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The reactions beetwen 2,4-disubstituted thiosemicarbazides and orthoesters in refluxing xylene led to the formation of the 1,2,4-triazoline-5-thione ring and to the 1,2,4-triazolium-5-thiolate ring. The formation of the mesoionic componds is due to rearrangement of the easily available 2,4-disubstituted thiosemicarbazides to 1,4-disubstituted thiosemicarbazides under the reaction conditions adopted. This method can be usefully used for the synthesis of mesoionic compounds, especially in the case of the 2-methyl-4-phenylthiosemicarbazide.
- Buccheri, Francesco,Cusmano, Giuseppe,Gruttadauria, Michelangelo,Noto, Renato,Werber, Giuseppe
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p. 1447 - 1451
(2007/10/03)
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