INTRAMOLECULAR HETEROCYCLIZATION OF <i>o</i>-(1-CYCLOALKENYL)ANILINES 2*. SYNTHESIS OF NEW 4<i>Н</i>-3,1-BENZOXAZINE AND 4<i>Н</i>-3,1-BENZOTHIAZINE 2-AMINO DERIVATIVES
DOI:
https://doi.org/10.1007/4900Keywords:
benzothiazine, benzoxazine, о-(cyclopent-1-en-1-yl)aniline, intramolecular heterocyclizationAbstract
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.