Design, Synthesis, and Structure−Affinity Relationships of Regioisomeric <i>N</i>-Benzyl Alkyl Ether Piperazine Derivatives as σ-1 Receptor Ligands
作者:Iman A. Moussa、Samuel D. Banister、Corinne Beinat、Nicolas Giboureau、Aaron J. Reynolds、Michael Kassiou
DOI:10.1021/jm100639f
日期:2010.8.26
A series of N-(benzofuran-2-ylmethyl)-N'-benzylpiperazines bearing alkyl or fluoroalkyl aryl ethers were synthesized and evaluated at various central nervous system receptors. Examination of in vitro sigma(1) [H-3](+)-pentazocinel and sigma(2) ([H-3]DTG) receptor binding profiles of piperazines 11-13 and 25-36 revealed several highly potent and sigma(1) selective ligands, notably, N-(benzofuran-2-ylmethyl)-N'-(4'-methoxybenzyl)piperazine (13, K-i = 2.7 nM, sigma(2)/sigma(1) = 38) and N-(benzofuran-2-ylmethyl)-N'-(4'-(2 ''-fluoroethoxy)benzyl)piperazine (30, K-i = 2.6 nM, sigma(2)/sigma(1) = 187). Structural features for optimal sigma(1) receptor affinity and selectivity over the 07 receptor were identified. On the basis of its favorable log D value, 13 was selected as a candidate for the development of a sigma(1) receptor positron emission tomography radiotracer. [C-11]13 showed high uptake in the brain and other a receptor-rich organs of a Papio hamadryas baboon. The in vivo evaluation of [C-11]13 indicates that this radiotracer is a suitable candidate for imaging the sigma(1) receptor in neurodegenerative processes.
[EN] METHODS OF USING PIPERAZINE COMPOUNDS IN TREATING SODIUM CHANNEL-MEDIATED DISEASES OR CONDITIONS<br/>[FR] PROCÉDÉS D'UTILISATON DE COMPOSÉS PIPÉRAZINE DANS LE TRAITEMENT DE MALADIES OU ÉTATS MÉDIÉS PAR LE CANAL SODIUM
申请人:XENON PHARMACEUTICALS INC
公开号:WO2008147864A2
公开(公告)日:2008-12-04
[EN] This invention is directed to piperazine compounds, as stereoisomers, enantiomers, tautomers thereof or mixtures thereof; or pharmaceutically acceptable salts, solvates or prodrugs thereof, for the treatment and/or prevention of sodium channel-mediated diseases or conditions, such as pain. [FR] L'invention concerne des composés pipérazine, tels que des stéréoisomères, des énantiomères, des tautomères et des mélanges de ces derniers, ou des sels, solvates ou promédicaments pharmaceutiquement acceptables de ces derniers, qui sont destinés au traitement et/ou à la prévention de maladies ou états médiés par le canal sodium, comme la douleur.