A series of substituted 4-aryl-piperazine-ethyl heteroarylcarboxamides were prepared and tested in in vitro radioligand binding studies. The presence of a quinoxaline has a favourable impact in terms of serotonin 5-HT1A versus dopamine D4.2 receptor selectivity. Compounds with a 3-CF3 group at the distal phenyl ring are the most effective in terms of affinity and selectivity for 5-HT1A versus D4.2 receptors. A 4-phenyl-1,2,3,6-tetrahydropyridine in place of the corresponding 4-phenyl-piperazine side chain is also favourable not only for the affinity for 5-HT1A and D4.2 receptors but also in some cases for α 2A-adrenoceptors.
我们制备了一系列取代的 4-芳基哌嗪-乙基杂芳基羧酰胺,并在体外放射性配体结合研究中进行了测试。喹喔啉的存在对血清素 5-HT1A 与多巴胺 D4.2 受体的选择性具有有利影响。就对 5-HT1A 受体和 D4.2 受体的亲和力和选择性而言,远端苯环上带有 3-CF3 基团的化合物最为有效。用 4-苯基-1,2,3,6-四氢吡啶取代相应的 4-苯基-哌嗪侧链也不仅有利于提高对 5-HT1A 和 D4.2 受体的亲和力,而且在某些情况下还有利于提高对 α 2A 肾上腺素受体的亲和力。