The reaction of 2-chloro-N-phenacylpyridinium salts with diazonium salts in the presence of bases was studied for the first time. It was demonstrated that this reaction leads to the formation of [1,2,4]triazolo[4,3-a]pyridinium salts. It was shown that substitution of the pyridine with a thiazole moiety leads to a similar cyclization.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2016, 52(9), 727–729
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Topchiy, M.A., Babaev, E.V. On cyclization of 2-chloro-N-phenacylpyridinium ylides by the action of aryldiazonium salts. Chem Heterocycl Comp 52, 727–729 (2016). https://doi.org/10.1007/s10593-016-1955-y
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DOI: https://doi.org/10.1007/s10593-016-1955-y