Conclusions
Intramolecular complexes prepared by addition of carboxylic acids, sulfonic acids, alcohols, and water to substituted 3,4-dihydro-4-boraquinazolines have been shown by IR spectroscopy to undergo tautomeric conversions in the amidine system, dependent on the type of H bonds formed by the compound.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 411–418, February, 1979.
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Dorokhov, V.A., Bochkareva, M.N., Boldyreva, O.G. et al. Organoboron compounds. 354. Tautomerism of intramolecular boron complexes containing an amidine group. Russ Chem Bull 28, 380–385 (1979). https://doi.org/10.1007/BF00925890
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DOI: https://doi.org/10.1007/BF00925890