assessed. The results for symmetrical esters showed that lengthening of the methylene chain in C3 and C5 ester substituents increased activity. When increasing of the length is accompanied by increasing the hindrance, the activity decreased. In contrast to symmetrical derivatives, comparison of the activities of asymmetrical esters showed that increasing the length of the methylene chain was accompanied
合成了
硝苯地平的一组烷基,环烷基和芳基
酯类似物,其中第4位的邻
硝基苯基被2-苯基-4(5)-
咪唑基取代基取代,并使用高评估豚鼠回肠纵向平滑肌的K +收缩,以及5a-d,8b和8f对抗
戊四唑(
PTZ)诱发的癫痫发作的活性。对称酯的结果表明,延长C3和C5酯取代基中亚甲基链的活性。当增加长度伴随增加障碍时,活性降低。与对称衍
生物相反,不对称酯活性的比较表明,亚甲基链长度的增加伴随着它们活性的降低。结果表明8a活性更高,而5c和8f的作用与参考药物
硝苯地平相似。评估了所述化合物对
PTZ诱导的癫痫发作阈值的抗惊厥作用的时程,并表明增加亲脂性减少了达到最大作用所需的时间。与对照组相比,腹膜内注射25 mg / kg的这些衍
生物治疗的小鼠均表现出增加的癫痫发作阈值。