1. 3-Amino-3,4-dihydroquinazolines
2. A satisfactory elemental analysis was obtained for C, H, and N. Melting points were determined microscopically on a hot stage and are corrected.
3. The nmr spectra were determined on a Varian A-60 instrument, the ir spectra were determined on a Beckmann IR-9 spectro-photometer and the mass spectra were determined on a CEC-21-110B instrument at 70eV by direct insertion.