Preparation Some New Heterocyclic Compounds Derived from Schiff Bases and Evaluation its Biological Activity

Theresearch include preparation some new 2, 3-dihydroquinazolin-4 (1H) -one and oxazepine derivatives. Schiff bases derivatives (1-5) formation from condensation 4-amino-N- (p-tolylcarbamothioyl) benzamide with some aromatic aldehyde (p-Bromobenzaldehyde, p-Nitrobenzaldehyde, p-Chloro benzaldehyde, 2, 4-di hydroxybenzaldehyde and 2, 4-di methoxybenzaldehyde). The solvent is ethanol and in the presence of glacial acetic acid. Thentwochemicalreagents (anthranilic acid and maleic anhydride) used to cyclization of the prepared Schiff bases to form 2, 3-dihydroquinazolin-4 (1H) -one (6-10), oxazepine (11-15) derivatives respectively. The chemical structure of new synthesized compounds characterized (infrared and some derivatives by Nuclear Magnetic Resonance (1HNMR, 13C-NMR) and measurements some of its physical features and some specific reactions. and checked through T. L. C. Also, The biological activity of some compounds was tested against bacteria.