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  • Title: Hybrid approach for the design of highly affine and selective dopamine D(3) receptor ligands using privileged scaffolds of biogenic amine GPCR ligands.
    Author: Sasse BC, Mach UR, Leppaenen J, Calmels T, Stark H.
    Journal: Bioorg Med Chem; 2007 Dec 01; 15(23):7258-73. PubMed ID: 17826096.
    Abstract:
    A series of compounds containing privileged scaffolds of the known histamine H(1) receptor antagonists cetirizine, mianserin, ketotifen, loratadine, and bamipine were synthesized for further optimization as ligands for the related biogenic amine binding dopamine D(3) receptor. A pharmacological screening was carried out at dopamine D(2) and D(3) receptors. In the preliminary testing various ligands have shown moderate to high affinities for dopamine D(3)receptors, for example, N-(4-{4-[benzyl(phenyl)amino]piperidin-1-yl}butylnaphthalen-2-carboxamide (19a) (hD(3)K(i)=0.3 nM; hD(2)K(i)=703 nM), leading to a selectivity ratio of 2343.
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