Synthesis of 4-Amino-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)one-[1,2,3]triazolebenzenesulphonamide Bioactive Hybrids as Novel Therapeutic Agents

A novel 1H-pyrazol[1,2,3]triazole-benzenesulphonamide hybrids (7a-o) were synthesized with benzenesulfonamide and substituted aromatic azides/benzyl azides by Click reaction conditions using Cu(II) and aqueous sodium ascorbate as an inexpensive catalyst in the solvent ratio 1:1 H2O-tBu-OH around 12-14 h at room temperature with high yields (81-92%) under eco-friendly conditions. These newly designed hybrids were characterized by IR, 1H NMR and mass spectroscopic studies. These hybrids were also screened for in vitro antimicrobial activities and correlated with molecular docking studies. Among the derivatives, compound 7c was found to be a potent antibacterial and antifungal agents with minimum inhibition concentration (MIC) of in vitro values were compared with standard molecules. The docking studies of these derivatives revealed that compound 7c having greater binding affinity against the drug target haemoglobin receptor IsdB (3RTL) and it was confirmed by the in vitro screening.