Negative allosteric modulators of the GluN2B NMDA receptor with phenylethylamine structure embedded in ring-expanded and ring-contracted scaffolds
作者:Louisa Temme、Elena Bechthold、Julian A. Schreiber、Sandeep Gawaskar、Dirk Schepmann、Dina Robaa、Wolfgang Sippl、Guiscard Seebohm、Bernhard Wünsch
DOI:10.1016/j.ejmech.2020.112138
日期:2020.3
A set of GluN2B NMDA receptor antagonists with conformationally restricted phenylethylamine substructure was prepared and pharmacologically evaluated. The phenylethylamine substructure was embedded in ring expanded 3-benzazocines 4 as well as ring-contracted tetralinamines 6 and indanamines 7. The ligands 4, 6 and 7 were synthesized by reductive alkylation of secondary amine 11, reductive amination
制备了一组具有构象受限的苯乙胺亚结构的GluN2B NMDA受体拮抗剂,并进行了药理学评估。苯乙胺的亚结构包埋在扩环的3-苯甲唑啉4和缩合的四氮杂胺6和茚满胺7中。配体4、6和7是通过仲胺11的还原烷基化,酮12和16的还原胺化以及亲核性合成的Nosylates 14和17的取代。3-benzazocine 4d(Ki = 32 nM)的中等GluN2B亲和力在两电极电压下转化为中等的细胞保护活性(IC50 = 890 nM)和中等的离子通道抑制(10%时为60%)。表达GluN1a / GluN2B的卵母细胞的钳位实验。尽管某些四氢化萘胺6和茚满胺7具有很高的GluN2B亲和力(例如Ki(7f)= 3.2 nM),它们不能抑制谷氨酸/甘氨酸诱导的细胞毒性。3-苯甲唑啉4,四氢萘胺6和茚满胺7的低细胞保护活性归因于苯环和/或苄基位置上缺少的OH部分。对接研究表明,新型GluN2B配体采用与Ro