Synthesis and Antimicrobial Activity Evaluation of Pyridine Derivatives Containing Imidazo[2,1‐b][1,3,4]Thiadiazole Moiety

Author:

Yang Liu1,Jiao Yu‐Xin1,Quan Yan‐Hua1,Li Ming‐Yu1,Huang Xin‐Yi1,Jin Jun‐Zheng2,Li Siqi1,Quan Ji‐Shan12,Jin Cheng‐Hua12ORCID

Affiliation:

1. Key Laboratory of Natural Medicines of the Changbai Mountain Ministry of Education College of Pharmacy Yanbian University Yanji 133002 China

2. Interdisciplinary Program of Biological Function Molecules College of Integration Science Yanbian University Yanji 133002 China

Abstract

AbstractFour series of novel pyridine derivatives (17 ai, 18 ai, 19 ae, and 20 ae) were synthesized and their antimicrobial activities were evaluated. Of all the target compounds, almost half target compounds showed moderate or high antibacterial activity. The 4‐F substituted compound 17 d (MIC=0.5 μg/mL) showed the highest antibacterial activity, its activity was twice the positive control compound gatifloxacin (MIC=1.0 μg/mL). For fungus ATCC 9763, the activities of compounds 17 a and 17 d are equivalent to the positive control compound fluconazole (MIC=8 μg/mL). Furthermore, compounds 17 a and 17 d showed little cytotoxicity to human LO2 cells, and did not show hemolysis even at ultra‐high concentration (200 μM). The results indicate that these compounds are valuable for further development as antibacterial and antifungal agents.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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