芳烷基-4-哌啶醇衍生物的合成及非阿片类镇痛活性研究

Design,synthesis and antalgic activities of aralkyl-ketone-4-piperidol derivatives

以中枢兴奋性氨基酸NMDA受体多胺调节位点为靶点,设计合成芳烷基-4-哌啶醇类全新化合物并研究它们的镇痛活性。以Boc保护的4-哌啶酮或相应取代的4-哌啶酮为原料,在CeCl3/NaI体系的催化下,与相应的α-卤代芳酮进行亲核加成反应等步骤共制备30个未见文献报道的新化合物,经高分辨质谱及核磁共振氢谱确证结构。小鼠扭体法和热板法镇痛试验及阿片受体结合试验结果表明:该类化合物具有较好的镇痛作用,其中化合物8、13、22在两种镇痛模型上均显示很强的镇痛活性,与阿片μ、δ、κ受体无明显亲和力,具有作为非阿片类镇痛新药开发的潜在价值。

A series of aralkyl-ketone-4-piperidol derivatives were synthesized and tested for their analgesic activities. All of the novel 30 compounds were prepared from 4-piperidone and α-halo-aralkyl-ketone through five steps, including Boc protection, nucleophilic addition in presence of CeCl3/NaI catalyst, deprotection, condensation and salification. Their structures were confirmed by ^1H NMR and HRMS. Preliminary in vivo pharmacological trials showed that most of the synthesized compounds revealed analgesic effects. Among the tested compounds, 8, 13 and 22 exhibited potent analgesic activities in both mice writhing and mice hot plate model. The three compounds have low affinity for μ, δ, κ receptors, which is a chance to find a better precursor of non-opioid analgesic for further optimization.