Synthesis, Docking Studies and Biological Evaluation of Benzobthiophen-2-yl-3-(4-arylpiperazin-1-yl)-propan-1-one Derivatives on 5-HT1A Serotonin Receptors
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A series of novel benzobthiophen-2-yl-3-(4-arylpiperazin-1-yl)-propan-1-one derivatives 6a–f, 7a–f and their corresponding alcohols 8a–f were synthesized and evaluated for their affinity towards 5-HT1A receptors. The influence of arylpiperazine moiety and benzobthiophene ring substitutions on binding affinity was studied. The most promising analogue, 1-(benzo[b]thiophen-2-yl)-3-(4-(pyridin-2-yl)piperazin-1-yl)propan- 1-one (7e) displayed micromolar affinity (Ki = 2.30 μM) toward 5-HT1A sites. Docking studies shed light on the relevant electrostatic interactions which could explain the observed affinity for this compound.
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