In order to study the influence of the length of the amino acid chain of N,N‐phthaloylamino acid amides as analogues of the former anticonvulsant taltrimide on the seizureantagonizing activity glycine, β‐alanine and γ‐aminobutyric acid (GABA) derivatives were synthesized. The corresponding taurine derivatives were also included. Generally, the glycine‐derived amides showed a higher activity than the β‐alanine and GABA derivatives in the maximal electroshock seizure (MES) test in mice upon intraperitoneal administration. The activity was comparable to the respective taurine derivatives. The N,N‐phthaloyl‐glycine amides were also active in the MES test upon oral administration to rats. No significant activity was noted in the seizure threshold test with subcutaneous pentylenetetrazole. The ED50 of N,N‐phthaloyl‐glycine ethyl amide (4b) in the MES test upon intraperitoneal administration to mice was 19.1 mg/kg. On a molar basis this activity is comparable to the activity of phenytoin with little toxicity in the rotorod test. In conclusion, N,N‐phthaloyl‐glycine amides might represent promising antiepileptic drugs.

中文翻译：

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中枢神经系统抑制性氨基酸N,N-邻苯二甲酰衍生物的合成及抗惊厥活性

为了研究作为前抗惊厥药他曲酰亚胺类似物的 N,N-邻苯二甲酰氨基酸酰胺的氨基酸链长度对癫痫拮抗活性甘氨酸的影响，合成了 β-丙氨酸和 γ-氨基丁酸 (GABA) 衍生物。还包括相应的牛磺酸衍生物。一般来说，在小鼠腹膜内给药的最大电休克癫痫 (MES) 试验中，甘氨酸衍生的酰胺显示出比​​ β-丙氨酸和 GABA 衍生物更高的活性。该活性与相应的牛磺酸衍生物相当。N,N-邻苯二甲酰甘氨酸酰胺在大鼠口服给药后在 MES 测试中也有活性。在皮下注射戊四唑的癫痫阈值试验中未发现显着活性。N的ED50，N-邻苯二甲酰-甘氨酸乙酰胺 (4b) 在 MES 试验中对小鼠腹膜内给药后的浓度为 19.1 mg/kg。在摩尔基础上，这种活性与苯妥英的活性相当，在转棒试验中几乎没有毒性。总之，N,N-邻苯二甲酰-甘氨酸酰胺可能代表有前景的抗癫痫药物。