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INTRAMOLECULAR HETEROCYCLIZATION OF o-(1-CYCLOALKENYL)ANILINES 2*. SYNTHESIS OF NEW 4Н-3,1-BENZOXAZINE AND 4Н-3,1-BENZOTHIAZINE 2-AMINO DERIVATIVES

Шамиль М. Салихов, Рамиль Р. Зарипов, Ляйсан Р. Латыпова, Ильдус Б. Абдрахманов
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Abstract


A new method was developed to synthesize 2-amino derivatives of 3,1-benzoxazines and 3,1-benzothiazines on the basis of о-(cyclopent- 1-en-1-yl)aniline by heterocyclization of phenyl- and allylurea and thiourea derivatives in the presence of CF3CO2H, H2O2, or Br2.


Keywords


benzothiazine; benzoxazine; о-(cyclopent-1-en-1-yl)aniline; intramolecular heterocyclization

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