4.7 Article

Synthesis, anti-Toxoplasma gondii and antimicrobial activities of benzaldehyde 4-phenyl-3-thiosemicarbazones and 2-[(phenylmethylene)hydrazonol-4-oxo-3-phenyl-5-thiazolidineacetic acids

Journal

BIOORGANIC & MEDICINAL CHEMISTRY
Volume 16, Issue 1, Pages 446-456

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2007.09.025

Keywords

thiosemicarbazone; 4-thiazolidinone; antimicrobial activity; anti-Toxoplasma gondii activity

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In the present communication, a new series of 2-[(phenylmethylene)hydrazono]-4-oxo-3-phenyl-5-thiazolidineacetic acids (2a-p) have been synthesized. Benzaldehyde 4-phenyl-3-thiosemicarbazones substituted (la-p) were also obtained and used as intermediate to give the title compounds. All synthesized compounds were characterized by IR, H-1 and (13) C NMR. The in vitro anti-Toxoplasma gondii activity of la-p and 2a-p was evaluated. The 4-thiazolidinones (2a-p) were screened for their ill vitro antimicrobial activity. For anti-Toxoplasma gondii activity, in general, all compounds promoted decreases in the percentage of infected cells leading to parasite elimination. These effects on intracellular parasites also caused a decrease in the mean number of tachyzoites. In addition, most of the 4-thiazolidinones showed more effective toxicity against intracellular parasites, with IC50 values ranging from 0.05 to 1 mM. According to results of antimicrobial activity, compounds 2f, 21, and 2p showed best activity against Mycobacterium luteus, 2c was more active against Mycobacterium tuberculosis, and 2g, 21, and 2n showed same activity as nistatin (standard drug) against Candida sp. (4249). (c) 2007 Elsevier Ltd. All rights reserved.

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