Synthesis, in vitro antibacterial and antifungal activity of some n-acetylated and non-acetylated pyrazolines

Abstract

Fourteen new N-acetylated and non-acetylated pyrazoline derivatives were synthesized by reacting chalcones with hydrazine in the presence of absolute ethanol however reaction was carried out in the presence of glacial acetic acid to afford N-acetylated pyrazolines. The chemical structures of the synthesized pyrazolines were confirmed by FTIR, 1HNMR, 13CNMR and mass spectroscopic data. The pyrazolines (1-14) were screened for antibacterial activity against ten bacterial strains using seven Gram-positive and three Gram-negative bacteria and antifungal activity against Aspergillus Flavus, Aspergillus Niger and Aspergillus pterus. Pyrazolines (1-14) found to exhibit good to excellent antimicrobial activities compared to the Levofloxacin and fluconazole used as standard drugs.