In the recent years, interest in the synthesis of diclofenac derivatives has increased due to their excep- tional biological activity. We present here the synthesis of some novel diclofenac derivatives through simple synthetic procedures, where the acylation of carbohydrazide compound 1 with chloroacetyl chlo- ride in dioxane produced the compound 2 . Chloroacetohydrazide compound 2 was further subjected to nucleophilic substitution reactions using different nucleophiles such as: hydrazine hydrate, thiosemicar- bazide and p -aminobenzenesulfonamide to give the corresponding derivatives 3-5 , respectively. More- over, the reaction of the hydrazinyl compound 3 with active hydrogen species such as: ethyl acetoacetate and acetyl acetone in refluxed ethanol provided the corresponding pyrazolone derivatives 6 and 7 , re- spectively. Furthermore, the reaction of previously reported diclofenac ester 8 with 1,2-diaminoethane gave the amino derivative 9 . Finally, condensation reaction of the latter compound with benzaldehyde in dioxan furnished the corresponding Schiff’s base compound 10 , while its acylation with chloroacetyl chloride in dioxan produced 11 . Different spectral (IR, NMR and Mass) and elemental analysis techniques were utilized to explore the structure of the synthesized compounds. All the synthesized compounds were tested for their in-vitro antibacterial activity against different strains of bacteria showing satisfac- tory results, and molecular docking study was performed to investigate the mode of action.
Research Abstract	
              Research Date	
              Research Department	
              
          Research File	
          
      Research Journal	
              Journal of Molecular Structure
          Research Member	
          
      Research Publisher	
              ELSEVIER
          Research Vol	
              1273
          Research Website	
              https://doi.org/10.1016/j.molstruc.2022.134371
          Research Year	
              1923