Abstract
Monosubstituted and N,N′-disubstituted thioureas enter into cyclization with pyrazinium and quinoxalinium ion to form imidazo[4,5-b]-annellated pyrazines and quinoxalines.
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For Communication 7, see [1].
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1684–1688, December, 1983.
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Charushin, V.N., Baklykov, V.G., Chupakhin, O.N. et al. Cyclization of N-alkylazinium cations with binucleophiles. 8. Annellation of the imidazole ring with pyrazines and quinoxalines. Chem Heterocycl Compd 19, 1333–1338 (1983). https://doi.org/10.1007/BF00842845
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DOI: https://doi.org/10.1007/BF00842845