Abstract
The reaction of 4-oxo-1,3-benz- and -naphthoxazinium perchlorates with hydroxylamine leads to 5-(o-hydroxyaryl)-1,2,4-oxadiazoles rather than to 3-(o-hydroxyaryl)-1,2,4-oxadiazoles, as was previously assumed. The structure of the compounds obtained was proved by alternative synthesis, as well as by mass spectrometry and comparison of the experimentally found and calculated dipole moments and Kerr constants of the possible structures of the o-hydroxyaryl-1,2,4-oxadiazoles.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 540–549, April, 1992.
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Ryabukhin, Y.I., Eliseeva, A.Y., Suzdalev, K.F. et al. Synthesis and study of the structure of o-hydroxyaryl-1,2,4-oxadiazoles. Chem Heterocycl Compd 28, 454–463 (1992). https://doi.org/10.1007/BF00767011
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DOI: https://doi.org/10.1007/BF00767011