Studies of 4H-3,1-benzoxazines. 13. Bromination of 1,2-dihydro-4H-3,1-benzoxazines

Authors

  • E. B. Громачевская Kuban State Technological University, Krasnodar 350072
  • Г. Д. Крапивин Kuban State Technological University, Krasnodar 350072
  • В. E. Заводник Kuban State Technological University, Krasnodar 350072
  • В. Г. Кульневич Kuban State Technological University, Krasnodar 350072

Abstract

Bromination of 2,4-substituted 1,2-dihydro-4H-benzoxazines with bromine in acetic acid was conducted. It was shown that either the corresponding 6,8-dibromo-1,2-hydrobenzoxazines or the products of their dehydrogenation — 6,8-dibromobenzoxazines, are primarily formed as a function of the structure of the dihydrobenzoxazine and the concentration of bromine in the reaction mixture. The structure of 6,8-dibromo-2-(5-nitrofuryl-2)-4, 4-diphenyl-1,2-dihydro-4H-3,1-benzoxazine was investigated by XSA. A stacking interaction between the nitrofuran fragment of one molecule and the condensed benzene ring of the other was detected in the crystal.

How to Cite
Gromachevskaya, E. V.; Krapivin, G. D.; Zavodnik, V. E.; Kul'nevich, V. G. Chem. Heterocycl. Compd. 1997, 33, 1209. [Khim. Geterotsikl. Soedin. 1997, 1391.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF02290872

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Published

1997-10-25

Issue

No. 10 (1997)

Section

Original Papers