Diclofenac-Based Hydrazones and Spirothiazolidinones: Synthesis, Characterization, and Antimicrobial Properties

Kocabalkanli A., Cihan-Ustundag G. , NAESENS L., Mataraci-Kara E. , Nassozi M., Capan G.

ARCHIV DER PHARMAZIE, cilt.350, 2017 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 350 Konu: 5
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1002/ardp.201700010


We report here the synthesis, structural characterization, and biological evaluation of novel diclofenac-based hydrazone (4a-f) and spirothiazolidinone (5a-f, 6a-f) derivatives designed as potential antimicrobial agents. The compounds were evaluated in vitro for their antiviral activity against a wide spectrum of DNA and RNA viruses. They were further screened in vitro against different strains of bacteria and fungi. The hydrazone derivatives, 4a and 4c-f, were found to be active against herpesviruses (HSV-1, HSV-2, and HSV-1 TK-), vaccinia virus, and Coxsackie B4 virus, with EC50 values between 6.6 mu g/mL and 14.7g/mL, and the selectivity index values were greater than 10 for 4a and 4f. The newly synthesized compounds (4-6) were inactive against the bacterial and the fungal strains tested, at levels below 2500, 1250, or 625g/mL. Interestingly, the key intermediate 3 with a free hydrazide moiety displayed antifungal properties against Candida albicans and C. parapsilosis at MIC values of 4.88 mu g/mL and 78.12g/mL, respectively.