Potential antifungal agents. Synthesis and activity of 2-alkylthiopyridine-4-carbothioamides
作者:V Klimešová、M Otčenášek、K Waisser
DOI:10.1016/0223-5234(96)89165-3
日期:1996.1
A series of 2-alkylthiopyridine-4-carbothioamides were synthesized, and their antifungal potency was tested. The chemical structures were proved by IR and H-1-NMR data and by elemental analysis. The MIC and MFC assessment were used for the estimation of potential activity in vitro. The study comprising 21 clinical isolates of fungi showed that compounds 5h and 5j exhibited fair inhibitory activity against some yeasts and dermatophytes. Selective fungistatic activity against dermatophytes (MIC = 3.12-25.0 mu g/mL) was found also in compound 5g. None of the above compounds showed inhibitory activity against non-dermatophyte filamentous fungi. Microbiological activity of 2-alkylthiopyridine-4-carbothioamides appears to be mainly related to hydrophobicity of alkyl in position 2.
Some Anilides of 2-Alkylthio- and 2-Chloro-6-Alkylthio-4-Pyridinecarboxylic Acids: Synthesis and Photosynthesis-Inhibiting Activity
Many compounds containing a -CONH- group display photosynthesis inhibiting activity. Based on this structural feature, a group of anilides of 2-alkylthio-(1b-4f) or 2-chloro-6-alkylthio-4-pyridinecarboxylic acids (5a-6c) was synthesised. The prepared compounds were tested for their inhibition of the oxygen evolution rate (OER) in spinach chloroplasts. A quasi-parabolic dependence between photosynthesis-inhibiting activity and the lipophilicity of the compounds was determined for 1b-4f as well as for 5a-6c. The inhibitory activity of compounds 1b-4f was higher than that of 5a-6c for comparable lipophilicity values.