Three 4-substituted 1,2,5-oxadiazol-3-ols containing aminoalkyl substituents (analogues and homologues of gamma-aminobutyric acid (GABA)) were synthesized to investigate the hydroxy-1,2,5-oxadiazolyl moiety as a bioisoster for a carboxyl group at GABA receptors. The pK(a) values of the target compounds were close to those of GABA. At GABA(A) receptors of cultured cerebral cortical neurons, weak agonist
合成了三个含有
氨基烷基取代基的4-取代的1,2,5-恶二唑-3-醇(γ-
氨基
丁酸(
GABA)的类似物和同系物),以研究羟基1,2,5-恶二唑基部分是
GABA受体上的羧基。目标化合物的pK(a)值接近
GABA。在培养的大脑皮层神经元的
GABA(A)受体上,鉴定出弱激动剂和部分激动剂谱,表明
4-羟基-1,2,5-恶二唑-3-基单元是非经典的羧基
生物等排体。