A series of S-Aryl(tetramethyl)isothiouronium salts were prepared and evaluated in vitro for antimicrobial activity. Some compounds revealed interesting inhibiting action on Gram-positive bacteria which is noteworthy in view of the large number of strains antagonized and of the low MIC values. The possible influence of decomposition kinetics to the corresponding mercaptoderivatives was intestigated and compared with those of salts previously studied.
The results herein described point out that the efforts devoted to the preparation of significant molecules can not be separated from those devoted to the discovery of new synthetic methodologies and to the solution of fundamental chemical problems. The border between basic and applied research vanishes very frequently.
The synthesis of 3-ethoxycarbonyl-5-aryl-pyrrole derivatives with an arylpiperazine group in position 2 is described. The in vitro biological investigation showed that compound (XVIII) had considerable antibacterial activity against gram-positive microorganisms and antifungal activity against Candida rugosa, while the other compounds did not show any significative activity.
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