6,7-Dihydro-2-benzothiophen-4(5H)-ones: a novel class of GABA-A alpha5 receptor inverse agonists |
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Authors: | Chambers Mark S Atack John R Bromidge Frances A Broughton Howard B Cook Susan Dawson Gerard R Hobbs Sarah C Maubach Karen A Reeve Austin J Seabrook Guy R Wafford Keith MacLeod Angus M |
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Affiliation: | Merck Sharp & Dohme Research Laboratories, The Neuroscience Research Centre, Terlings Park, Eastwick Road, Harlow, Essex CM20 2QR, UK. mark_chambers@merck.com |
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Abstract: | Nonselective inverse agonists at the benzodiazepine binding site on the GABA-A chloride ion channel enhance cognitive performance in animals but cannot be used in the treatment of cognitive disorders because of anxiogenic and convulsant side effects. We have identified a novel series of GABA-A alpha5 receptor ligands during our search for alpha5 receptor inverse agonists as potential cognition enhancers. In particular, 6,6-dimethyl-3-(2-hydroxyethyl)thio-1-(thiazol-2-yl)-6,7-dihydro-2-benzothiophen-4(5H)-one (26) has been identified as a functionally selective GABA-A alpha5 inverse agonist. |
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