Synthesis of Thieno[2,3-<i>b</i>]Pyridinones Acting as Cytoprotectants and as Inhibitors of [<sup>3</sup>H]Glycine Binding to the <i>N</i>-Methyl-<scp>d</scp>-aspartate (NMDA) Receptor
作者:Hans-Peter Buchstaller、Carsten D. Siebert、Ralf Steinmetz、Ina Frank、Michael L. Berger、Rudolf Gottschlich、Joachim Leibrock、Michael Krug、Dieter Steinhilber、Christian R. Noe
DOI:10.1021/jm0503493
日期:2006.2.1
nolin-2(1H)-one (21), was used as a template for bioisostere benzene/thiophene exchange. Phenylacetylation of aminothiophene carboxylic acid methyl esters and subsequent cyclization delivered the three possible thienopyridinone isomers. 4-Hydroxy-5-phenylthieno[2,3-b]pyridin-6(7H)-one (3a), with the shortest distance between the sulfur and the nitrogen atom, was the most potent isomer (K(i) against
N-甲基-D-天冬氨酸(NMDA)受体的标准甘氨酸位点拮抗剂3-phenyl-4-hydroxyquinolin-2(1H)-one(21),用作生物等位苯/噻吩交换的模板。氨基噻吩羧酸甲酯的苯乙酰化和随后的环化反应提供了三种可能的噻吩并吡啶酮异构体。4-Hydroxy-5-phenylthieno [2,3-b] pyridin-6(7H)-one(3a)是硫和氮原子之间距离最短的异构体(K(i)) [(3)H]甘氨酸与大鼠膜的结合(16 microM),效力与模型喹啉酮(21,12 microM)相当。用2-噻吩基残基代替21的苯基取代基导致效力损失2-5倍并且被放弃。在噻吩并吡啶酮核的噻诺部分,最成功的取代基是靠近硫原子的卤素(Cl或Br)和在另一个位置的短烷基链,产生7h,8h,8i和8m,K(i)值在5.8和10.5 nM之间。引入3'-苯氧基部分产生了几种具有更高效能的化合物(18h,18i,18l和18m;