Preparation and anticonvulsant activity of a series of functionalized .alpha.-aromatic and .alpha.-heteroaromatic amino acids
作者:Harold Kohn、Kailash N. Sawhney、Philippe LeGall、Judith D. Conley、David W. Robertson、J. David Leander
DOI:10.1021/jm00165a006
日期:1990.3
We recently reported the potent anticonvulsant activity of (R,S)-alpha-acetamido-N-benzyl-alpha-phenylacetamide (2b). Selectively substituted derivatives of this compound have now been prepared (23 examples) and evaluated in the maximal electroshock seizure (MES) and horizontal screen (tox) tests in mice. In several key cases, replacement of the alpha-phenyl substituent in 2b by a relatively small
我们最近报道了(R,S)-α-乙酰氨基-N-苄基-α-苯基乙酰胺(2b)的强效抗惊厥活性。现在已经制备了该化合物的选择性取代的衍生物(23个实例),并在小鼠的最大电击惊厥(MES)和水平筛选(tox)测试中进行了评估。在几种关键情况下,用相对较小的,富电子的杂芳族部分取代2b中的α-苯基取代基可大大改善候选药物的抗惊厥潜能。活性最高的化合物是(R,S)-α-乙酰氨基-N-苄基-2-呋喃乙酰胺(2g)和(R,S)-α-乙酰氨基-N-苄基-2-吡咯乙酰胺(2i)。腹膜内给药后,2g(10.3 mg / kg)和2i(16.1 mg / kg)的MES ED50值与苯妥英钠(9.50 mg / kg)相当。对2g的两个单独对映体的评估表明,抗惊厥活性存在于R立体异构体中。(R)-2g的低ED50值(3.3 mg / kg)有助于观察到该候选药物的大保护指数(TD50 / ED50),接近苯妥英的保护指数。