Abstract
A series of chalcones, a flavone and one flavanone were synthesized and elucidated structurally by IR and 1H NMR spectroscopies. The synthetic compounds were then screened for acetylcholinesterase inhibitory activity using thin layer chromatography (TLC) and microplate assays. In the TLC assay, only 2′-hydroxy-4-methoxychalcone and 2′-hydroxy-4′-O-prenyl-2,6-dichlorochalcone were found to show moderate and weak activity respectively against acetylcholinesterase (AchE) at 0.1 mM concentration compared to the control galanthamine. 4′-Hydroxy-2,6-dichlorochalcone, 2′-hydroxy-4-nitrochalcone, 2′-hydroxy-4-(dimethyl)aminochalcone and 2′-hydroxy-4-methoxychalcone showed moderate AchE inhibitory activity with percentage inhibition of 54.24, 46.14 and 49.32 % respectively in the microplate assay.
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