REASSIGNMENT OF THE COMPOUNDS REPORTED TO BE 4,5-DIHYDRO-3H-1-BENZAZEPIN-5-OLS AS 2,3,4,5-TETRAHYDRO-2,5-EPOXY-1H-1-BENZAZEPINES AND 3,4,5,6-TETRAHYDRO-1,6-BENZODIAZOCINES AS 2,3,3A,4-TETRAHYDRO-1H-PYRROLO[1,2-A]BENZIMIDAZOLES

Reexamination of the H-1 and C-13 n.m.r. spectra of the supposed 4,5-dihydro-3H-1-benzazepin-5-ols (1) has led to a reassignment of their structure as 2,3,4,5-tetrahydro-2,5-epoxy-1H-1-benzazepines (3) and the new structure has been confirmed by a single-crystal X-ray structure determination of the 5-phenyl derivative (3; R1 = H, R2 = Ph). Similar examination of the n.m.r. spectra of the supposed 3,4,5,6-tetrahydro-1,6-benzodiazocines (2) has led to their reassignment as the pyrrolo[1,2-a]benzimidazoles (4).