Synthesis of 2,5‐Disubstituted‐1,3,4‐oxadiazole Derivatives and Their Evaluation as Anticancer and Antimycobacterial Agents
2017
A series of regioisomeric (2,5-dimethoxybenzoic acid, veratric acid) analogues were prepared by swapping the carboxylic motif to its oxadiazole bioisostere and have been screened for in vitro anticancer studies by using MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) colorimetric assay. All of them were well characterized by spectroscopic techniques. Among the screened compounds, 9 i (2-(2,5-dimethoxyphenyl)-5-(5-phenylthiophen-2-yl)-1,3,4-oxadiazole) demonstrated superior activity against MDA231 cells. Products 9 i displayed excellent activity against DU145, HCT15 and 10 i (2-(3,4-dimethoxyphenyl)-5-(5-phenylthiophen-2-yl)-1,3,4-oxadiazole) against MDA231 cells. Structure of 10 c (2-(3,4-dimethoxyphenyl)-5-(2,4,6-trimethoxyphenyl)-1,3,4-oxadiazole) was further authenticated through single crystal X-ray diffraction. Analogue 9 i have come out to be the best anticancer and antimycobacterial agent.
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