Synthesis and Analysis of Anticonvulsant Activities of New 4-[2-(4- alkoxybenzylamino)ethyl]-2H-1,2,4-triazol-3(4H)-one Derivatives
作者:Qing-Kun Shen、Shi-Ben Wang、Guo-Hua Gong、Xiu-Mei Yin、Zhe-Shan Quan
DOI:10.2174/1570180812666141111235746
日期:2015.3.24
The present study involved the design and synthesis of new substituted 4-[2-(4-
alkoxybenzylamino) ethyl]-2H-1,2,4-triazol-3(4H)-one derivatives (8a-w) starting from 1,2-
ethanediamine. The final compounds were screened for their in vivo anticonvulsant activities and neurotoxicities
by maximal electroshock (MES) and rotarod tests, respectively. Among the compounds
studied, 4-[2-(4-butoxybenzylamino)ethyl]-2H-1,2,4-triazol-3(4H)-one hydrochloride (8b) was found
by intraperitoneal administration in mice to be the most potent compound with a median effective
dose (ED50) value of 33.2 mg/kg and a high protective index (PI) value of 11.4. Compound 8b showed significant oral activity
against MES-induced seizures in mice with an ED50 value of 83.1 mg/kg and a PI of 18.1. The results demonstrated
that compound 8b possessed better anticonvulsant activity and higher safety than the marketed drug carbamazepine.
本研究涉及从1,2-乙二胺出发设计合成新型取代的4-[2-(4-烷氧基苯基氨基)乙基]-2H-1,2,4-三唑-3(4H)-酮衍生物(8a-w)。最终化合物通过最大电击(MES)和转杆测试分别筛选其在体抗癫痫活性和神经毒性。在研究的化合物中,4-[2-(4-丁氧基苯基氨基)乙基]-2H-1,2,4-三唑-3(4H)-酮盐酸盐(8b)通过腹腔给药在小鼠中被发现是最有效的化合物,其中位有效剂量(ED50)为33.2 mg/kg,保护指数(PI)值为11.4。化合物8b对MES诱导的小鼠癫痫发作表现出显著的口服活性,ED50值为83.1 mg/kg,PI为18.1。结果表明,化合物8b具有比市场药物卡马西平更好的抗癫痫活性和更高的安全性。