3-Chlorobenzoic acid hydrazide was reacted with different aryl isothiocyanates to give the corresponding 1-(3-
chlorobenzoyl)-4-substituted thiosemicarbazides 1-16. Reaction yields ranged from 74 to 96%. Structures of the synthesized
compounds were defined on the basis of 1H NMR and IR spectra. As it was showed the antibacterial activity of the
obtained compounds was limited only towards Gram-positive bacteria. As regards B. cereus ATCC 10876, 1-(3-
chlorobenzoyl)-4-(3,5-dichlorophenyl)thiosemicarbazide (8) was 16 times more active than ampicillin and 8 times more
active than cefuroxime.
Keywords: Hydrazides, Structure-activity relationships, MIC, MRSA.
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