Toward the Definition of Stereochemical Requirements for MT<sub>2</sub>-Selective Antagonists and Partial Agonists by Studying 4-Phenyl-2-propionamidotetralin Derivatives
作者:Annalida Bedini、Simone Lucarini、Gilberto Spadoni、Giorgio Tarzia、Francesco Scaglione、Silvana Dugnani、Marilou Pannacci、Valeria Lucini、Caterina Carmi、Daniele Pala、Silvia Rivara、Marco Mor
DOI:10.1021/jm200790v
日期:2011.12.22
New derivatives of 4-phenyl-2-propionamidotetralin (4-P-PDOT) were prepared and tested on cloned MT1 and MT2 receptors, with the purpose of merging previously reported pharmacophores for nonselective agonists and for MT2-selective antagonists. A 8-methoxy group increases binding affinity of both (±)-cis- and (±)-trans-4-P-PDOT, and it can be bioisosterically replaced by a bromine. Conformational analysis
制备4-苯基-2-丙酰胺基四氢化萘的新衍生物(4-P-PDOT),并在克隆的MT 1和MT 2受体上进行测试,目的是合并先前报道的非选择性激动剂和MT 2-选择性拮抗剂的药效团。8-甲氧基增加了(±)-顺式-和(±)-反式-4-P-PDOT的结合亲和力,并且可以被溴等位生物取代。NMR数据支持的分子动力学对8-甲氧基-4-P-PDOT进行构象分析,结果显示(2 S,4 S)-顺式异构体在能量上有利于构象,而(2 R,4小号)-反过来,满足非选择性褪黑激素受体激动剂药效团模型的要求。一个新的叠加模型,包括MT 2-选择性拮抗剂的特征,表明MT 1 / MT 2激动剂和MT 2拮抗剂可以共享相同的药效学元素排列。该模型正确地预测了(±)-顺式-和(±)-反式-4-P-PDOT的幸福感。通过制备三种二氢萘衍生物来验证该模型,该衍生物能够或不能再现4-P-PDOT的假定活性构象。