Nitroimidazolyl-1,3,4-thiadiazole-based anti-leishmanial agents: Synthesis and in vitro biological evaluation
2009
Abstract A series of 1-[5-(1-methyl-5-nitro-1 H -imidazol-2-yl)-1,3,4-thiadiazol-2-yl]-4-aroylpiperazines were synthesized and evaluated in vitro against Leishmania major . Most of the target compounds exhibited good anti-leishmanial activity against the promastigote form of L. major at non-cytotoxic concentrations. The most active compound was 1-[(5-chloro-2-thienyl)carbonyl]-4-[5-(1-methyl-5-nitro-1 H -imidazol-2-yl)-1,3,4-thiadiazol-2-yl]piperazine ( 5f ) with an IC 50 value of 9.35 ± 0.67 μM against L. major promastigotes. In addition, this compound was effective against intracellular L. major and significantly decreased the infectivity index.
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