Abstract
Electrophilic addition of HCl or Br2 to N-acyl-2-(alk-2-enyl)anilines is accompanied by intramolecular cyclization of these amides to give 3,1-benzooxazine hydrochlorides or hydrobromides in high yields.
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Gataullin, R.R., Afonkin, I.S., Fatykhov, A.A. et al. A facile method for the synthesis of 3,1-benzooxazines from N-acyl-2-(alk-2-enyl)anilines. Russian Chemical Bulletin 50, 659–664 (2001). https://doi.org/10.1023/A:1011312912357
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DOI: https://doi.org/10.1023/A:1011312912357