Reassessing the melatonin pharmacophore—Enantiomeric resolution, pharmacological activity, structure analysis, and molecular modeling of a constrained chiral melatonin analogue
作者:Silvia Rivara、Giuseppe Diamantini、Barbara Di Giacomo、Doriano Lamba、Giuseppe Gatti、Valeria Lucini、Marilou Pannacci、Marco Mor、Gilberto Spadoni、Giorgio Tarzia
DOI:10.1016/j.bmc.2005.12.053
日期:2006.5
information obtained by crystallographic analysis and NMR studies about the conformational preference for 2 and by the pharmacological characterization of (R)-2 and (S)-2 was employed in a molecular modeling study, aimed at reassessing the melatonin receptor pharmacophore model for agonist compounds. Chiral enantioselective agonists reported in the literature were also included in the study.
3-(乙酰氨基甲基)-2-(乙氧羰基)-6-甲氧基-1,3,4,5-四氢苯并[cd] ind ole(2)是一种刚性的褪黑激素类似物,作为外消旋体显示出大约相同的亲和力和内在活性褪黑素(1)的体外实验。我们在这里报告了制备型中压液相色谱(MPLC)的外消旋体拆分和(-)-对映体R绝对构型的X射线测定。两种对映体分别作为MT1和MT2配体进行测试,并且(+)-(S)-2的效价与褪黑激素相当,并且比其对映体高约三个数量级。通过结晶学分析和NMR研究获得的有关2构象偏好的信息以及通过(R)-2和(S)-2的药理学表征获得的信息用于分子建模研究,目的在于重新评估激动剂化合物的褪黑激素受体药效团模型。文献中报道的手性对映选择性激动剂也包括在研究中。