Abstract
1-Ethyl-2-methyl-4,5,6,7-tetrafluorobenzimidazole was synthesized, and symmetrical and unsymmetrical imidacarbocyanines and merocyanines that are derivatives of Nethylrhodanine were synthesized from it. It was established that complete replacement of the hydrogen atoms in the benzene ring of benzimidazole by fluorine leads to a decrease in the basicity of the imidacarbocyanine and a hypsochromic shift of the absorption maximum in series of imidacarbo- and imidadimethylidyne-merocyanines.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1675–1679, December, 1981.
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Troitskaya, V.I., Rudyk, V.I., Yakobson, G.G. et al. Cyanine dyes from 2-methyl-4,5,6,7-tetrafluorobenzimidazole derivatives. Chem Heterocycl Compd 17, 1232–1236 (1981). https://doi.org/10.1007/BF00507000
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DOI: https://doi.org/10.1007/BF00507000