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Bioorg Med Chem. 2008 Jul 15;16(14):6707-23. doi: 10.1016/j.bmc.2008.05.075. Epub 2008 Jun 5.

Studies toward the discovery of the next generation of antidepressants. Part 6: Dual 5-HT1A receptor and serotonin transporter affinity within a class of arylpiperazinyl-cyclohexyl indole derivatives.

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Chemical and Screening Sciences, Wyeth Research, CN 8000, Princeton, NJ 08543-8000, USA.


Based on the previously reported discovery lead, 3-(cis-4-(4-(1H-indol-4-yl)piperazin-1-yl)cyclohexyl)-5-fluoro-1H-indole (2), a series of related arylpiperazin-4-yl-cyclohexyl indole analogs were synthesized then evaluated as 5-HT transporter inhibitors and 5-HT(1A) receptor antagonists. The investigation of the structure-activity relationships revealed the optimal pharmacophoric elements required for activities in this series. The best example from this study, 5-(piperazin-1-yl)quinoline analog (trans-20), exhibited equal binding affinities at 5-HT transporter (K(i)=4.9nM), 5-HT(1A) receptor (K(i)=6.2nM) and functioned as a 5-HT(1A) receptor antagonist.

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