Synthesis of Chiral 1-(2‘-Amino-2‘-carboxyethyl)-1,4-dihydro-6,7-quinoxaline-2,3-diones: α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionate Receptor Agonists and Antagonists
作者:Guoping Sun、Norman J. Uretsky、Lane J. Wallace、Gamal Shams、David M. Weinstein、Duane D. Miller
DOI:10.1021/jm950632+
日期:1996.1.1
A racemic mixture of 1-(2'-amino-2'-carboxyethyl)-1,4-dihydroquinoxaline-2, 3-dione (QXAA, 2, R1 = R2 = H) has been synthesized from 1 (R1 = R2 = H). This compound inhibited specific [3H]AMPA binding but not [3H]kainate binding. IC50 values for QXAA, AMPA, and DNQX were 0.69, 0.012, and 0.74 microM, respectively. The R- and S-enantiomers were prepared by asymmetric synthesis. The S-isomer (2b) was 160-fold
最近发现的6,7-二取代喹喔啉-2,3-二酮1可以拮抗对α-氨基-3-羟基-5-羟基-4-甲基-4-异恶唑丙酸酯(AMPA)和海藻酸的特异性结合和功能响应。尽管各种研究已经分析了在6和7位具有各种取代基的喹喔啉-2,3-二酮的活性,但是关于N取代作用的信息很少。从1(R1 = R2 = H)。该化合物抑制特异性的[3H] AMPA结合,但不抑制[3H]海藻酸酯结合。QXAA,AMPA和DNQX的IC50值分别为0.69、0.012和0.74 microM。R-和S-对映异构体通过不对称合成制备。S-异构体(2b)在结合测定中的效力比R-异构体(2d)高160倍,IC50值分别为0.23和38 microM。在功能测定中,两种对映异构体都是激动剂,S-异构体的EC50值为3 microM,而R-异构体的EC50值大于1 mM。在6和7位(2a和2c)处的甲基取代导致拮抗剂化合物,其特征在于S