... J. Heterocyclic Chem., 39, 163 (2002). ... We applied an intramolecular cyclization of the phenols 5 to the synthesis of the oxazepine derivatives 4. Compounds 1a-j (X=O, R2=CH3, R3=H) were synthe- sized from 4-bromo-2-methylthiophene 6 which was pre- Jan-Feb 2002 ... Vol. ...