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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
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New ethacridine derivatives as the potential antifungal and antibacterial preparations

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Department of Pharmaceutical Chemistry and Pharmacognosy
2
Department of Microbiology, Kaunas University of Medicine, Lithuania
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Author to whom correspondence should be addressed.
Medicina 2007, 43(8), 657; https://doi.org/10.3390/medicina43080084
Received: 19 February 2007 / Accepted: 6 August 2007 / Published: 11 August 2007
Until the 20th century fungal infections were rather easy cured, and the need of new antifungal drugs was low. However, low choice of antifungal preparations, their toxicity, limited spectrum of action, and ability to produce resistant strains show the need of new effective medicines for systemic fungal diseases in nowadays. Our goal of research was to synthesize new antimicrobial compounds containing three or more pharmacophores in one molecule. The initial 5-substituted-2-methylmercaptothiazolidin-4-ones were subjected to S-demethylation to yield 2- amino-substituted thiazolidinones. Ethacridine, nitrofuran aldehydes and nitrobenzene aldehyde as pharmacophoric amino or aldehyde group having compounds have been used. Antimicrobial (antifungal) activity of the new compounds was screened in vitro in these bacterial cultures: Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, Bacillus subtilis ATCC 6633, Klebsiella pneumoniae ATCC 33499 and fungal cultures: Candida albicans ATCC 60l93, Candida glabrata, Candida krusei, Candida kefyr ATCC 86l4, Candida tropicalis ATCC 8302, Candida parapsilosis. Results showed that the new compounds were significantly more effective as antimicrobial agents than initial preparation ethacridine. Ethacridine derivatives were not only effective against numerous gram-positive and some gram-negative bacteria, but the spectrum of action has been discovered against fungi. Minimal fungistatic concentration varies in the range l0.0–750 µg/mL and antibacterial concentration is in the range 62.5–l000 µg/mL. Compound 2a having nitrofuryl substituent in the fifth position of tiazolidine cycle was the most active of synthesized ethacridine compounds. The obtained results gave the opportunity to separate the perspective group of potential antiinfective compounds.
Keywords: ethacridine; thiazolidine; nitrofuran; antifungal activity; antibacterial activity ethacridine; thiazolidine; nitrofuran; antifungal activity; antibacterial activity
MDPI and ACS Style

Petrikaite, V.; Tarasevišius, E.; Pavilonis, A. New ethacridine derivatives as the potential antifungal and antibacterial preparations. Medicina 2007, 43, 657.

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