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Herein, a series of novel hybrid sulfaguanidine moieties, bearing 2-cyanoacrylamide 2a - d , pyridine-2-one 3 - 10 , and 2-imino-2 H -chromene-3-carboxamide 11 , 12 derivatives, were synthesized, and their structure confirmed by spectral data and elemental analysis. All the synthesized compounds showed moderate to good antimicrobial activity against eight pathogens. The most promising six derivatives, 2a , 2b , 2d , 3a , 8 , and 11 , revealed to be best in inhibiting bacterial and fungal growth, thus showing bactericidal and fungicidal activity. These derivatives exhibited moderate to potent inhibition against DNA gyrase and DHFR enzymes, with three derivatives 2d , 3a , and 2a demonstrating inhibition of DNA gyrase, with IC 50 values of 18.17-23.87 µM, and of DHFR, with IC 50 values of 4.33-5.54 µM; their potency is near to that of the positive controls. Further, the six derivatives exhibited immunomodulatory potential and three derivatives, 2d , 8 , and 11 , were selected for further study and displayed an increase in spleen and thymus weight and enhanced the activation of CD4 + and CD8 + T lymphocytes. Finally, molecular docking and some AMED studies were performed.

antibiotics

Sulfaguanidine Hybrid with Some New Pyridine-2-One Derivatives: Design, Synthesis, and Antimicrobial Activity against Multidrug-Resistant Bacteria as Dual DNA Gyrase and DHFR Inhibitors