الفهرس 
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Abstract
Part (I): Synthesis of some new 2-substituted-4-sulfamoyl-phenylazo-thiophene, thiazole and/or pyrazole derivatives as antibacterial agents:Benzoylacetone has been reacted with phenyl isothiocyanate to afford two differentthiocarbamoyl derivatives (α-phenylthiocarbamoyl benzoylacetone and benzoyl thioacetanilide)depending upon the base used to perform the reaction. Several new 2-substituted-4-sulfamoylphenylazo-thiophene and/or thiazole derivatives were synthesized by heterocyclization of the thiocarbamoyl derivatives with various halogenated reagents. The synthesized compounds>were screened for their antibacterial activities; they showed accepted activities with respect to the control drugs.Part (II): Utilization of 2-cyano-N-(4-sulfamoylphenyl) acetamide in heterocyclic synthesis:>Cyanoacetamide coupled with diazonium salts, derived from the appropriate aromatic amines (4-aminophenol, 4-aminoacetophenone, ethyl 4-aminobenzoate) in pyridine to afford the respective hydrazones which heated with 2-(benzo[d][1,3]dioxol-5-ylmethylene)malononitrile under reflux in ethanol containing five drops of piperidine gave the corresponding amino-nicotinonitrile derivative While condensation with acetylacetone proceeded by reflux in ethanol containing drops of triethylamine to furnish the corresponding 3-cyanopyridone derivative.