Methanocarba Analogues of Purine Nucleosides as Potent and Selective Adenosine Receptor Agonists
作者:Kenneth A. Jacobson、Xiao-duo Ji、An-Hu Li、Neli Melman、Maqbool A. Siddiqui、Kye-Jung Shin、Victor E. Marquez、R. Gnana Ravi
DOI:10.1021/jm9905965
日期:2000.6.1
(N)-Methanocarba analogues of various N(6)-substituted adenosine derivatives, including cyclopentyl and 3-iodobenzyl, in which the parent compounds are potent agonists at either A(1) or A(3) receptors, respectively, were synthesized. The N(6)-cyclopentyl derivatives were A(1) receptor-selective and maintained high efficacy at recombinant human but not rat brain A(1) receptors, as indicated by stimulation of binding
腺苷受体激动剂具有心脏保护、脑保护和抗炎特性。我们报告核糖部分纳入环约束的碳环修饰是设计具有良好药效学特性的 A(1) 和 A(3) 受体激动剂的一般方法。虽然腺苷激动剂的简单碳环取代大大降低了效力,但甲卡巴-腺苷类似物现在已经确定了糖褶皱在稳定活性腺苷受体结合构象中的作用,从而可以识别出一种有利的异构体。在此类类似物中,稠合环丙烷部分将核苷的假糖环限制为北(N)或南(S)构象,如假旋转循环中所定义。在 A(1)、A(2A) 和 A(3) 受体的结合试验中,(N)-methanocarba-腺苷比 (S)-类似物具有更高的亲和力,特别是在人类 A(3) 受体上(N/S 亲和力比为 150)。(N)-Methanocarba 类似物的各种 N(6)-取代的腺苷衍生物,包括环戊基和 3-碘苄基,其中母体化合物分别是 A(1) 或 A(3) 受体的有效激动剂,被合成。N(6)-环戊基衍生物对 A(1)