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Chiral 1,3,4-Oxadiazol-2-ones as Highly Selective FAAH Inhibitors
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2013 (English)In: Journal of Medicinal Chemistry, ISSN 0022-2623, E-ISSN 1520-4804, Vol. 56, no 21, 8484-8496 p.Article in journal (Refereed) Published
Abstract [en]

In the present study, identification of chiral 1,3,4-oxadiazol-2-ones as potent and selective FAAH inhibitors has been described. The separated enantiomers showed clear differences in the potency and selectivity toward both FAAH and MAGL. Additionally, the importance of the chirality on the inhibitory activity and selectivity was proven by the simplification approach by removing a methyl group at the 3-position of the 1,3,4-oxadiazol-2-one ring. The most potent compound of the series, the S-enantiomer of 3-(1-(4-isobutylphenyl)ethyl)-5-methoxy-1,3,4-oxadiazol-2(3H)-one (JZP-327A, Si), inhibited human recombinant FAAH (hrFAAH) in the low nanomolar range (IC50 = 11 mu M), whereas its corresponding R-enantiomer 52 showed only moderate inhibition toward hrFAAH (IC50 = 0.24 mu M). In contrast to hrFAAH, R-enantiomer 52 was more potent in inhibiting the activity of hrMAGL compared to S-enantiomer 51 (IC50 = 4.0 mu M and 16% inhibition at 10 mu M, respectively). The FAAH selectivity of the compound Si over the supposed main off-targets, MAGL and COX, was found to be >900-fold. In addition, activity-based protein profiling (ABPP) indicated high selectivity over other serine hydrolases. Finally, the selected Senantiomers 51, 53, and 55 were shown to be tight binding, slowly reversible inhibitors of the hrFAAH.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2013. Vol. 56, no 21, 8484-8496 p.
National Category
Pharmacology and Toxicology
Identifiers
URN: urn:nbn:se:umu:diva-84115DOI: 10.1021/jm400923sISI: 000327111100021OAI: oai:DiVA.org:umu-84115DiVA: diva2:680415
Available from: 2013-12-18 Created: 2013-12-16 Last updated: 2017-12-06Bibliographically approved

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