Biological studies on 2,1-benzisothiazole derivatives. II. Evaluation of antimicrobial and genotoxic properties of bz-nitro-, 3-ethylacetate-, 3-amino- and 3-substituted amino 2,1-benzisothiazoles.
The in vitro antimicrobial activity of bz-nitro-, 3-ethylacetate-, 3-amino- and 3-substitutedamino 2,1-benzisothiazoles was evaluated. The compounds studied were found to display a very low activity against bacteria and fungi, with the exception of compound 61, which exhibited a relatively high activity against Bacillus subtilis, Escherichia coli and Saccharomyces cerevisiae. As for genotoxic properties, compounds 1-3, 5 and 6 showed DNA-damaging activity in the Bacillus subtilis rec-assay. The Salmonella-microsome assay confirmed the genotoxicity of these compounds and also revealed the mutagenicity of compounds 4, 7-12, 23, 24, 31, 33-35, 38, 39, 44, 49, 51, 53, 57-63. Structure-activity relationships showed all the compounds containing an aromatic nitro group or an unsubstituted amino group to possess genotoxic properties. Whereas most of the 3-acylamino-, 3-acylalkylamino- and 3-azomethynderivatives showed mutagenic activity, none of the 3-alkylamino-2,1-benzisothiazoles was active. None of the 1,2-isomers studied showed genotoxic properties.
Dipartimento Farmaceutico, Università di Parma, Italy.
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Zani
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Bellotti
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Mazza
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000494:pharmacology* / Q000633:toxicity; D001419:Bacteria / Q000187:drug effects; D005658:Fungi / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D009153:Mutagens / Q000633:toxicity; D013329:Structure-Activity Relationship; D013844:Thiazoles / Q000494:pharmacology* / Q000633:toxicity
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D009153:Mutagens; D013844:Thiazoles