and 7 positions, displayed high potency (Kb approximately 6-8 nM) at the glycine site, moderate potency at non-NMDA receptors (Kb = 0.9-1.5 microM), and the highest (120-250-fold) selectivity in favor of glycine site antagonism over non-NMDA receptors. Tetrasubstituted QXs 17d,e were more than 100-fold weaker glycine site antagonists than the corresponding trisubstituted QXs with F being better tolerated
合成了一系列的单,二,三和四取代的1,4-二
氢喹喔啉-2,3-二
酮(QXs),并在
N-甲基-D-天冬氨酸(N
MDA)/甘
氨酸位点和α位作为
拮抗剂进行了评估-
氨基-3-羟基-
5-甲基异恶唑-4-
丙酸优先的非N
MDA受体。通过电测定在表达大鼠全脑poly(A)+ RNA的非洲爪蟾卵母细胞中测量
拮抗剂的效力。三取代QX 17a(ACEA 1021),17b(ACEA 1031),24a和27,在5位含硝基,在6和7位含卤素,在甘
氨酸上显示出高效价(Kb约为6-8 nM)位点,对非N
MDA受体的药效中等(Kb = 0.9-1.5 microM),与非N
MDA受体相比,甘
氨酸位点拮抗作用的选择性最高(120-250倍)。四取代的QX 17d e是比相应的三取代QX弱100倍的弱甘
氨酸位点
拮抗剂,在8位上F作为取代基比Cl具有更好的耐受性。与三取代类似物相比,二取代和单取代的QX显示出越来越弱的拮抗作