Novel 2-(benzo[d]thiazol-2-yl)-1-(3-methyl-5-substituted-phenyl-4,5-dihydropyrazol-1-yl)ethanone Derivatives: Synthesis and Antibacterial Activity

Title: Novel 2-(benzo[d]thiazol-2-yl)-1-(3-methyl-5-substituted-phenyl-4,5-dihydropyrazol-1-yl)ethanone Derivatives: Synthesis and Antibacterial Activity

Volume: 8 Issue: 5

Author(s): Chun-Xiu Pan, Jun Li and Xin-Hua Liu

Affiliation:

Keywords: Benzo[d]thiazole, Dihydropyrazole, Antibacterial activity, ethanone Derivatives, C-glycoside, pyrazole, Staphylococcus, bromination, acetophenone, benzothiazole, aeruginosa, Novobiocin

Abstract: A series of novel 2-(benzo[d]thiazol-2-yl)-1-(3-methyl-5-substituted-phenyl-4,5-dihydropyrazol-1-yl)ethanone derivatives were synthesized and characterized by NMR, ESI-MS. Biological activity tests results show that compounds 4a, 4b, 4d and 4g displayed activity with MIC of 1.562 μg/mL against B. subtilis ATCC 6633, compound 4d displayed significant activity with MIC of 1.562 μg/mL against S. aureus ATCC 6538. Compound 4a with potent antibacterial activities strongly inhibited S. aureus DNA gyrase and B. subtilis DNA gyrase with IC50s of 0.5 μg/ml against S. aureus DNA gyrase and B. subtilis DNA gyrase.

Cite this article as:

Pan Chun-Xiu, Li Jun and Liu Xin-Hua, Novel 2-(benzo[d]thiazol-2-yl)-1-(3-methyl-5-substituted-phenyl-4,5-dihydropyrazol-1-yl)ethanone Derivatives: Synthesis and Antibacterial Activity, Letters in Drug Design & Discovery 2011; 8 (5) . https://dx.doi.org/10.2174/157018011795514212