Novel α-Amino-3-hydroxy-5-methylisoxazole-4-propionate Receptor Antagonists: Synthesis and Structure−Activity Relationships of 6-(1<i>H</i>-Imidazol-1-yl)- 7-nitro-2,3(1<i>H</i>,4<i>H</i>)-pyrido[2,3-<i>b</i>]pyrazinedione and Related Compounds
作者:Junya Ohmori、Hirokazu Kubota、Masao Shimizu-Sasamata、Masamichi Okada、Shuichi Sakamoto
DOI:10.1021/jm950304+
日期:1996.3.15
for quinoxalinedione in AMPA receptor binding. The detailed structure-activity relationships of 6- and/or 7-substituted 2,3(1H,4H)-pyrido[2,3-b]pyrazinedione derivatives 4, 7-1-, 13, 15 and 16 showed some differences in comparison with those of the corresponding substituted quinoxalinediones, including 6-(1H-imidazol-1-yl)-7-nitro-2,3-(1H,4H)-quinoxalinedione (1) (YM90K). The X-ray study exhibited that
我们已经合成并评估了氮杂喹喔啉酮3a-c在抑制大鼠全脑[3H] AMPA结合中的活性。发现氮杂喹喔啉二酮核在AMPA受体结合中起喹喔啉二酮的生物同工异构体的作用。6-和/或7-取代的2,3(1H,4H)-吡啶并[2,3-b]吡嗪二酮衍生物4、7-1、13、15和16的详细结构-活性关系显示出一些差异与包括6-(1H-咪唑-1-基)-7-硝基-2,3-(1H,4H)-喹喔啉二酮(1)(YM90K)的相应取代喹喔啉二酮的比较。X射线研究表明1.HCl的7-硝基基团与喹喔啉环几乎共面,而6-咪唑-1-基相对于芳环旋转。从NMDA受体结合研究中的甘氨酸位点开始,表明在吡啶并吡嗪二酮上6-取代基的庞大可能是针对甘氨酸位点的选择性的原因。在一系列的氮杂喹喔啉二酮中,6-(1H-咪唑-1-基)-7-硝基-2,3(1H,4H)-吡啶并[2,3-b]吡嗪二酮(8c)表现出最佳亲和力的组合对AMPA受体具有Ki值为0