Metal‐based isatin‐bearing sulfonamides: their synthesis,characterization and biological properties

A new series of antibacterial and antifungal isatin bearing sulfonamides and their cobalt (II), copper (II), nickel (II) and zinc (II) metal complexes have been synthesized, characterized and screened for their in vitro antibacterial activity against Bacillus cereus, Corynebacterium diphtheriae, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Pseudomonas aeruginosa, Salmonella typhi, Shigilla dysentriae and Staphylococcus aureus and for in vitro antifungal activity against Trichophyton schoenleinii, Candid glabrata, Pseudallescheria boydii, Candida albicans, Aspergillus niger, Microsporum canis and Trichophyton mentagrophytes. The results of these studies revealed that all compounds showed moderate to significant antibacterial activity. The brine shrimp bioassay was also carried out to study their in vitro cytotoxic properties. Only three compounds, 2, 11 and 22 displayed potent cytotoxic activity as LD₅₀ = 1.56 × 10^?7, 1.59 × 10^?7 and 1.67 × 10^?7 M /ml respectively, against Artemia salina. Copyright © 2006 John Wiley & Sons, Ltd.