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Synthesis, biological evaluation, and molecular docking studies of novel diclofenac derivatives as antibacterial agents

Research Authors
Mahmoud M. Hamed, Mostafa Sayed , ShawkatA. Abdel-Mohsen , Abdelreheem Abdelfatah Saddik , Omneya A. Ibrahim , Adel M. Kamal El-Dean , Mahmoud S. Tolba
Research Abstract

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 Date
Research Department
Research Journal
Journal of Molecular Structure
Research Publisher
ELSEVIER
Research Vol
1273
Research Website
https://doi.org/10.1016/j.molstruc.2022.134371
Research Year
1923