Synthesis and pharmacological evaluation of potent and enantioselective σ1 and σ2 ligands
作者:Agostino Marrazzo、Orazio Prezzavento、Lorella Pasquinucci、Franco Vittorio、Giuseppe Ronsisvalle
DOI:10.1016/s0014-827x(01)01039-4
日期:2001.4
In a previous study we found that substitutions of the (+)-cis-N-normetazocine nucleus of (+)-MPCB with 1-adamantanamine provide the compound (+/-)-10 with high affinity and selectivity for sigma receptors. Starting with this result we have synthesized a new series of eight 1-phenyl-2-cyclopropylmethylamines structurally related to (+/-)-10, and binding affinities, with respect to sigma(1), sigma(2), opioid and dopaminergic D-2 receptors, have been reported. All compounds showed a negligible opioid and dopaminergic affinity and high selectivity for sigma receptors. Modifications on the amino moiety and methylcarboxyester group of 10 provide compounds with different sigma(1), and sigma(2) binding affinity and selectivity. Moreover, we have also synthesized the respective enantiomers of componds (+/-)-10 and (+/-)-18 in order to evaluate the enantioselectivity for sigma(1) and sigma(2) receptors. The binding data showed that carboxymethylester on the cyclopropane ring was more critical for enantioselectivity than the hydroxymethylenic group. In fact, the (-)-10 enantionter showed a preference for sigma(1) whereas (+)-10 showed a preference for sigma(2), (C) 2001 Elsevier Science S.A. All rights reserved.