5-Aryl-2-carboxy-5-(pyridin-1-ium-1-yl)penta-2,4-dienoates, previously unknown pyridine betaines, were formed in 32–70% yields as a result of the reaction of arylpropynals, substituted pyridines, and malonic acid instead of the expected 5-arylpent-2-en-4-ynoic acids. The molecular structure of the novel compounds was studied by X-ray structural analysis.
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The study was supported by the Russian Science Foundation (grant 18-13-00008).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2019, 55(1), 93–96
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Golovanov, A.А., Dan’kov, S.А., Sokov, S.А. et al. An unusual result of the reaction of α-acetylene aldehydes, pyridines, and malonic acid. Synthesis and structure of novel pyridine betaines. Chem Heterocycl Comp 55, 93–96 (2019). https://doi.org/10.1007/s10593-019-02424-6
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DOI: https://doi.org/10.1007/s10593-019-02424-6