Recyclization of 1,3,4-Oxadiazoles and Bis-1,3,4-oxadiazoles into 1,2,4-Triazole Derivatives. Synthesis of 5-Unsubstituted 1,2,4-Triazoles |
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| Authors: | N I Korotkikh A V Kiselev A V Knishevitsky G F Raenko T M Pekhtereva O P Shvaika |
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| Institution: | (1) L.M. Litvinenko Institute of Physical Organic and Coal Chemistry, National Academy of Sciences of Ukraine, Donetsk, 83114, Ukraine |
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| Abstract: | Efficient methods have been developed for obtaining precursors of stable carbenes, viz. 5-unsubstituted 3,4-diaryl-1,2,4-triazoles
and 3,3′- or 4,4′-bridge linked bis-1,2,4-triazoles, by the recyclization of 5-unsubstituted 1,3,4-oxadiazoles or p-phenylenebis-1,3,4-oxadiazole
with anilines or aromatic diamines in the presence of trifluoroacetic acid or with aniline hydrochlorides in pyridine.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1026–1032, July, 2005. |
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| Keywords: | 3 4-diaryl-1 2 4-triazoles precursors of stable carbenes 1 3 4-oxadiazoles 3 3′ - and 4 4′ -bridge linked bis-1 2 4-triazoles recyclization reaction |
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