Synthesis, Bioactivity Screening and Docking Analysis of Thiazole Derivatives Containing Quinoline Moieties

A new series of quinoline-thiazole compounds (1b-3b) were synthesized by two step reaction where thiosemicarbazone derivatives (1a-3a) were obtained from quinolinecarbaldehyde and thiosemicarbazide. The final products (1b-3b) were synthesized from thiosemicarbazone and 3-chloroacetylacetone. Characterizations of all synthesized compounds (1a-3a, 1b-3b) were performed by IR, Proton and Carbon-13 NMR spectroscopic methods. In vitro antimicrobial studies of thiazole derivatives (1b-3b) were screened by agar disc diffusion method. Compounds 1b and 3b revealed significant antibacterial effects against B. cereus, K. pneumonia, S. aureus and 2b revealed potential antibacterial effects against S. aureus, K. pneumonia with standard. Compounds 1b, 2b and 3b showed significant antifungal activities against the fungi A. niger with standard amphotericin B. In silico molecular docking studies performed by DFT method revealed that compound 1b and 3b showed good binding score against 2BTF protein taken from protein data bank.