Abstract
Reaction of phenoxyacetic acid hydrazide with isocyanate was used to the synthesis of new semicarbazide derivatives. Cyclization of these compounds in a 2% aqueous solution of sodium hydroxide led to formation of 1,2,4‐triazole‐3‐one. The chemical structure of synthesized compounds was confirmed by elemental analysis and spectroscopic methods (1H and 13C NMR). On the basis of the NMR, spectra were found that cyclic compounds 1,2,4‐triazole exist in the ‐one form. Moreover, all derivatives were examined for their in vitro activity against some species of bacteria. New compounds presented mild or moderate antimicrobial activity only against reference Gram‐positive bacteria. Two derivatives (one semicarbazide and one triazole) showed bactericidal or bacteriostatic activity.
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