1. C. J. Cattanach, A. Cohen and B. Heath-Brown, J. Chem. Soc., Perkin Trans. 1, 1041 (1973).
2. Dibenz[b,f]azepines and related ring systems
3. A synthesis of pyrrolo[ 3,2,1-kl] phenothiazine and derivatives
4. C. R. Ganellin and H. F. Ridley, J. Chem. Soc., 1537 (1969).
5. Infrared spectra were recorded on a Beckman Ir-33 spectrophotometer. Nmr spectra were recorded on a Varian EM360L spectrometer using tetramethylsilane as an internal standard and the mass spectra on a Varian MAT311A double focusing mass spectrometer. The melting pojnt is uncorrected and was determined on a Thomas-Hoover capillary melting point apparatus. Microanalysis were performed by the University Analytical Center, Tucson, Arizona. Uv spectra were recorded on a Cary 14UV visible spectrophotometer.