Structure−Activity Relationships of Alkyl- and Alkoxy-Substituted 1,4-Dihydroquinoxaline-2,3-diones: Potent and Systemically Active Antagonists for the Glycine Site of the NMDA Receptor
作者:Sui Xiong Cai、Sunil M. Kher、Zhang-Lin Zhou、Victor Ilyin、Stephen A. Espitia、Minhtam Tran、Jon E. Hawkinson、Richard M. Woodward、Eckard Weber、John F. W. Keana
DOI:10.1021/jm960654b
日期:1997.2.1
alkoxy-substituted 1,4-dihydroquinoxaline-2,3-diones (QXs), prepared as a continuation of our structure-activity relationship (SAR) study of QXs as antagonists for the glycine site of the N-methyl-D-aspartate (NMDA) receptor. The in vitro potency of these antagonists was determined by displacement of the glycine site radioligand [3H]-5,7-dichlorokynurenic acid ([3H]DCKA) in rat brain cortical membranes.
我们报告了一系列烷基和烷氧基取代的1,4-二氢喹喔啉-2,3-二酮(QXs),作为我们对QXs作为甘氨酸位点拮抗剂的结构-活性关系(SAR)研究的延续而编写N-甲基-D-天冬氨酸(NMDA)受体。这些拮抗剂的体外药效是通过在大鼠大脑皮膜中置换甘氨酸位点放射性配体[3H] -5,7-二氯基尿酸([3H] DCKA)来确定的。通常,甲基可以很好地取代6位的氯或溴,烷氧基取代的QX的效能比烷基或卤素取代的QX低。乙基取代的QX通常不如甲基取代的QX强,特别是在5,6,7-三取代的QX的6位上。环系统在6,7位融合的结果导致QX的效能低下。几种甲基取代的QXs是有效的甘氨酸位点拮抗剂,在小鼠的最大电击(MES)测试中具有令人惊讶的高体内活性。其中,7-氯-6-甲基-5-硝基QX(14g)(IC50 = 5 nM)和7-溴-6-甲基-5-硝基QX(14f)(IC50 = 9 nM)至6,7-二氯-5-硝基QX(2)(ACEA