摘要:
The racemates of cis (pip/Me) 1-[1-(2-thienyl)-2-methylcyclohexyl]pipe and cis (pip/Me) 1-[1-(2-furanyl)-2-methylcyclohexyl]piperidine, 2 derivatives of the noncompetitive N-methyl-D-aspartate (NMDA) antagonist 1-[1-(2-thienyl)cyclohexyl]piperidine (TCP) have been synthesized. The corresponding isomers were resolved by a crystallization procedure, via the diastereoisomeric salts formed with (+)- and (-)-di-O,O'-4-toluoyltartaric acid. The absolute configuration was determined by single-crystal X-ray analysis and by comparison with previously published data in related series. The 4 homochiral structures obtained were tested for their affinity for the PCP receptor sites labelled with [H-3]TCP. Their neuroprotective potency was assessed in primary cultured neuronal cells against neurotoxicity induced by glutamate. The 2(-)-1S, 2R-isomers displayed the highest affinity for the PCP receptor sites and the highest efficacy for neuronal protection in comparison with the (+)-1R, 2S-isomers.