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Chemical properties of ylidene derivatives of azines. 1. Structure of the products of protonation of dihydro-2-pyrimidylidene- and dihydro-4-pyrimidylidenecyanoacetic esters

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Abstract

The structure of the products of protonation of dihydro-2-pyrimidylidene- and dihydro-4-pyrimidylidenecyanoacetic esters was investigated by means of IR, UV, and 1H and 13C NMR spectroscopy. It is shown that, in contrast to the corresponding α-derivative of pyridine. the investigated compounds have an ylidene structure in solutions of strong acids and in the form of perchlorates; the protons are attached to the heterocyclic nitrogen atoms.

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Authors and Affiliations

  1. Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR, 630090, Novosibirsk

    O. A. Zagulyaeva, O. A. Grigorkina, V. I. Mamatyuk & V. P. Mamaev

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  1. O. A. Zagulyaeva
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  2. O. A. Grigorkina
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  3. V. I. Mamatyuk
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  4. V. P. Mamaev
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 397–404, March, 1982.

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Zagulyaeva, O.A., Grigorkina, O.A., Mamatyuk, V.I. et al. Chemical properties of ylidene derivatives of azines. 1. Structure of the products of protonation of dihydro-2-pyrimidylidene- and dihydro-4-pyrimidylidenecyanoacetic esters. Chem Heterocycl Compd 18, 300–306 (1982). https://doi.org/10.1007/BF00522135

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  • DOI: https://doi.org/10.1007/BF00522135

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