Synthesis and anticonvulsant activity of novel 2,6-diketopiperazine derivatives. Part 2: Perhydropyrido[1,2-a]pyrazines
作者:Maciej Dawidowski、Franciszek Herold、Andrzej Chodkowski、Jerzy Kleps
DOI:10.1016/j.ejmech.2011.11.032
日期:2012.2
A new series of chiral pyrido[1,2-a]pyrazine derivatives was synthesised and evaluated in in vivo animal models of epilepsy. A significant influence of the stereochemistry of the pyrido[1,2-a]pyrazine framework on the pharmacological activity was observed. Compounds with (4R,9aS) absolute configuration proved inactive, whereas other stereoisomers exhibited markedly dissimilar spectra of anti-seizure
合成了一系列新的手性吡啶并[1,2- a ]吡嗪衍生物,并在癫痫的体内动物模型中进行了评估。观察到吡啶并[1,2- a ]吡嗪骨架的立体化学对药理活性的重大影响。具有(4 R,9a S)绝对构型的化合物被证明是无活性的,而其他立体异构体在最大电击发作(MES),皮下Metrazol发作(scMET)和毛果芸香碱引起的状态预防(PISP)方面显示出明显不同的抗癫痫功效谱测试。重要的是,被研究的药物在ED 50的6 Hz模型中显示出很高的效价。值可与参考药物左乙拉西坦相当。衍生物(4 S,9a R)-6和(4 R,9a R)-6作为有前途的新先导结构出现,前者具有广泛的抗惊厥活性,而后者在6 Hz和PISP模型中显示出高效力。