Abstract
2,4,7-Triaryl-5H-3,4-dihydroimidazo[1,2-b]-1,2,4-triazepines were obtained on the basis of 4-phenyl-1,2-diaminoimidazole and chalcones. Their IR, UV, PMR, and mass spectra are discussed. It is shown that the more basic 1-NH2 group of the starting diamine participates in the formation of the azomethine bond of the seven-membered heteroring. The seven-membered ring has a “quasi-boat” form in which the 2- and 4-aromatic substituents occupy equatorial positions.
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See [1] for communication 7.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 93–97, January, 1983.
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Orlov, V.D., Papiashvili, I.Z., Povstyanoi, M.V. et al. Condensed imidazo-1,2,4-azines. 8. Synthesis of 5H-3,4-dihydroimidazo[1,2-b]-1,2,4-triazepine derivatives. Chem Heterocycl Compd 19, 83–87 (1983). https://doi.org/10.1007/BF00512822
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DOI: https://doi.org/10.1007/BF00512822