Impact of hydroxy moieties at the benzo[7]annulene ring system of GluN2B ligands: Design, synthesis and biological evaluation
作者:Louisa Temme、Frederik Börgel、Dirk Schepmann、Dina Robaa、Wolfgang Sippl、Constantin Daniliuc、Bernhard Wünsch
DOI:10.1016/j.bmc.2019.115146
日期:2019.12
moieties at the benzo[7]annulene scaffold on the GluN2B affinity and cytoprotective activity was analyzed. The key intermediate for the synthesis of OH-substituted benzo[7]annulenamines 11-13 and 17 was the epoxyketone 8. Reductive epoxide opening of 8 resulted with high regioselectivity in the 5-hydroxyketone 9 (Pd(OAc)2, HCO2H, phosphane ligand) or the 6-hydroxyketone 10 (H2, Pd/C), whereas hydrolysis
在这项研究中,分析了苯并[7]环戊烯骨架上一个或两个羟基对GluN2B亲和力和细胞保护活性的影响。为OH取代的苯并[7]的合成中间体的关键annulenamines 11 - 13和17是环氧酮8。在5-羟基酮9(Pd(OAc)2,HCO 2 H,膦配体)或6-羟基酮10(H 2,Pd / C)中,还原环氧化物8的开环具有较高的区域选择性,而在二恶烷水溶液中的水解则导致二羟基酮14。这些酮与伯胺和NaBH(OAc)的还原性胺化3得到苯并[7] annulenamines 11 - 13和17。在受体结合研究中,5-OH衍生物11和12显示出比6-OH衍生物13高的GluN2B亲和力,而6-OH衍生物13则比5,6-di-OH衍生物17a更具活性。对于配体的细胞保护活性,发现了相同的顺序。在5位上带有一个OH部分的叔胺12a代表最有希望的GluN2B负变构调节剂,其结合亲和力为K i = 49