New groups of potential antibuberculotics

9. Summary This work is focused on the synthesis and biological evaluation of the derivatives of 1-aryl-5-(benzylsulphanyl)tetrazole and group of hybrid molecules of estrone. It has been found before that alkylsulphanyl group bound to an electron deficient carbon of heterocyclic system represents a pharmacophore responsible for a significant antimycobacterial activity. It has been reported that some antimycobacterial compounds are often antifungal as well. The study is subdivided into three parts. The first one compares the antimycobacterial activity of a group of derivatives of 1-aryl-5-(alkylsulphanyl)tetrazole derivatives (where ethyl, propyl, iso-propyl or allyl stands for the alkyl) and 1-aryl-5-(benzylsulphanyl)tetrazole. The benzyl derivatives exhibited significantly better activity, which was further confirmed by the QSAR analysis. Concerning the group of benzyl derivatives, it was observed that, substitution on the benzyl moiety leads to lower activity. The second studied subject was the antifungal activity of the prepared 1-aryl-5-(benzylsulphanyl)tetrazoles evaluated on eight clinically important fungal strains. The activity was negligible with the exception of Trichophyton mentagrophytes. By means of QSAR analysis, it was found out in the studied group that the increase in the lipophility causes..