Attempts to Access a Series of Pyrazoles Lead to New Hydrazones with Antifungal Potential against <i>Candida</i> species including Azole-Resistant Strains

oleh: Georgiana Negru, Laure Kamus, Elena Bîcu, Sergiu Shova, Boualem Sendid, Faustine Dubar, Alina Ghinet

Format: Article
Diterbitkan: MDPI AG 2021-09-01

Deskripsi

The treatment of benzylidenemalononitriles with phenylhydrazines in refluxing ethanol did not provide pyrazole derivatives, but instead furnished hydrazones. The structure of hydrazones was secured by X-ray analysis. The chemical proof was also obtained by direct reaction of 3,4,5-trimethoxybenzaldehyde with 2,4-dichlorophenylhydrazine. Newly synthesized hydrazones were tested against eight <i>Candida</i> spp. strains in a dose response assay to determine the minimum inhibitory concentration (MIC<sub>99</sub>). Five compounds were identified as promising antifungal agents against <i>Candida</i> spp. (<i>C. albicans</i> SC5314, <i>C. glabrata</i>, <i>C. tropicalis</i>, <i>C. parapsilosis</i> and <i>C. glabrata</i> (R azoles)), with MIC<sub>99</sub> values ranging from 16 to 32 µg/mL and selective antifungal activity over cytotoxicity.