Synthesis, Opioid Receptor Binding, and Biological Activities of Naltrexone-Derived Pyrido- and Pyrimidomorphinans
作者:Subramaniam Ananthan、Hollis S. Kezar、Ronald L. Carter、Surendra K. Saini、Kenner C. Rice、Jennifer L. Wells、Peg Davis、Heng Xu、Christina M. Dersch、Edward J. Bilsky、Frank Porreca、Richard B. Rothman
DOI:10.1021/jm990039i
日期:1999.9.1
evaluated for binding and biological activity at the opioid receptors. The unsubstituted pyridine 6a displayed high affinities at opioid delta, mu, and kappa receptors with K(i) values of 0.78, 1.5, and 8.8 nM, respectively. Compound 6a was devoid of agonist activity in the mouse vas deferens (MVD) and guinea pig ileum (GPI) preparations but was found to display moderate to weak antagonist activity in the
从纳曲酮合成了一系列吡啶基和嘧啶吗啡喃(6a-h和7a-g),并评估了对阿片受体的结合和生物活性。未取代的吡啶6a在阿片样物质δ,μ和κ受体上显示出高亲和力,其K(i)值分别为0.78、1.5和8.8 nM。化合物6a在小鼠输精管(MVD)和豚鼠回肠(GPI)制剂中没有激动剂活性,但在MVD和GPI中显示出中等至弱的拮抗剂活性,K(e)值为37和164 nM,分别。通常,嘧啶吗啡喃比吡啶对应物具有更低的结合力和δ受体结合选择性。在吡啶基和嘧啶吗啡喃骨架上结合芳基作为假定的δ地址模拟物,使配体在结合亲和力和内在活性方面具有显着差异。在6a的4'位置或7a的等效6'位置连接苯基会导致所有三个阿片受体的结合力显着降低,这表明在配体结合位点存在某种相似的空间约束,mu和kappa受体的表达 相反,在6a的5'-位引入苯基不会引起在δ受体上的结合亲和力的任何降低。与未取代的吡啶6a相比,5' -苯基