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Hetero-Annulated Coumarins As New Ache/Buche Inhibitors: Synthesis and Biological Evaluation Publisher



Ebrahimi SES1 ; Ghadirian P1 ; Emtiazi H2 ; Yahyameymandi A1 ; Saeedi M3, 4 ; Mahdavi M5 ; Nadri H6 ; Moradi A6 ; Sameem B1 ; Vosooghi M7 ; Emami S8 ; Foroumadi A9 ; Shafiee A9
Authors

Source: Medicinal Chemistry Research Published:2016


Abstract

A series of chromene-fused coumarins known as 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-diones 4a–o were synthesized through one-pot reaction of appropriate benzaldehydes, dimedone, and 4-hydroxycoumarin in the presence of nano-silica sulfuric acid under solvent-free condition in good yields. The in vitro anticholinesterase assay revealed that the 3-hydroxyphenyl analog 4e showed the highest inhibitory activity against both acetylcholinesterase and butyrylcholinesterase, possessing IC50 values of 3.28 and 2.19 µM, respectively. The structure-activity relationships study demonstrated that the selectivity for acetylcholinesterase over butyrylcholinesterase could be modulated by introducing second hydroxyl or methoxy substituent on the para-position of the 3-hydroxyphenyl pendent group. The docking study of compound 4e with acetylcholinesterase confirmed π–π stacking interaction between the coumarin moiety and Trp279 as well as the formation of hydrogen bonding between hydroxyl group and Asn85. © 2016, Springer Science+Business Media New York.
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