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Synthesis of derivatives of 2-acylamino-7-oxybenzo[b]thiophene. Bromination and nitration

Abstract

Bromination of 2-acylamino-3-ethoxycarbonyl-7-oxo-4,5,6,7-tetrahydrobenzo[b]-thiophenes has been studied. This reaction affords 2-acylamino-6,6-dibromo-3-ethoxycarbonyl-7-oxo-4,5,6,7-tetrahydrobenzo[b]thiophene, which on dehydrobro-mination gives 6-bromo-7-oxybenzo[b]thiophene derivatives. The 4,6-dibromo- and 4,6-dinitro-7-oxybenzo[b]thiophenes were also obtained.

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Literature Cited

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    I. A. Kharizomenova, M. V. Kapustina, A. N. Grinev, Yu. N. Sheinker, L. M. Alekseeva, and E. F. Kuleshova, Khim. Geterosikl. Soedin., No. 2, 1626 (1984).

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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 460–462, April, 1987.

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Grinev, A.N., Kharizomenova, I.A., Kapustina, M.V. et al. Synthesis of derivatives of 2-acylamino-7-oxybenzo[b]thiophene. Bromination and nitration. Chem Heterocycl Compd 23, 384–386 (1987). https://doi.org/10.1007/BF00546729

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Keywords

  • Organic Chemistry
  • Thiophene
  • Nitration
  • Thiophene Derivative