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Cyclization of N-alkylazinium cations with bifunctional nucleophiles. 22. Crystal and molecular structure of tetrahydroquinoxaline condensed with the six-membered 1,3,4-thiadiazine ring

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

X-ray diffraction examination of 4-acetyl-10-methyl-2-phenyl-1,4,4a,5,10,10a-hexahydro-1,3,4-thiadiazino[5,6-b]quinoxaline has shown that the 4a-H and 10a-H hydrogens attached to the carbon atoms common to both heterocycles are cis-oriented, as in the annelation of five-membered heterocycles to the tetrahydropyrazine ring, but in this case the torsion angle H(4a)C(4a)C(10a)H(10a) is much greater, having a value of 60‡.

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Authors and Affiliations

  1. S. M. Kirov Urals Polytechnic Institute, 620002, Sverdlovsk

    D. S. Yufit, Yu. T. Struchkov, V. N. Drozd, V. N. Charushin, V. G. Baklykov & O. N. Chupakhin

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  1. D. S. Yufit
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  2. Yu. T. Struchkov
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  3. V. N. Drozd
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  4. V. N. Charushin
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  5. V. G. Baklykov
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  6. O. N. Chupakhin
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Additional information

For Communication 21, see [1].

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 701–706, May, 1987.

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Yufit, D.S., Struchkov, Y.T., Drozd, V.N. et al. Cyclization of N-alkylazinium cations with bifunctional nucleophiles. 22. Crystal and molecular structure of tetrahydroquinoxaline condensed with the six-membered 1,3,4-thiadiazine ring. Chem Heterocycl Compd 23, 583–587 (1987). https://doi.org/10.1007/BF00476392

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  • DOI: https://doi.org/10.1007/BF00476392

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