Synthesis and anticonvulsant activity evaluation of 8-alkoxy-5-(4H-1,2,4-triazol-4-yl)quinoline derivatives
作者:Shi-Ben Wang、Xian-Qing Deng、Yan Zheng、Hong-Jian Zhang、Zhe-Shan Quan
DOI:10.1007/s12272-013-0006-9
日期:2013.1
Two series of 8-alkoxy-5-(4H-1,2,4-triazol-4-yl)quinolines and 8-alkoxy-5-(2H-1,2,4-triazol-3-one-4-yl)quinolines were synthesized. The anticonvulsant activity of these compounds was evaluated with maximal electroshock seizure test and rotarod test. Among the synthesized compounds, 8-octoxy-5-(4H-1,2,4-triazol-4-yl)quinoline (4g) was the most active compound with ED50 of 8.80 mg/kg, TD50 of 176.03 mg/kg and protective index of 20.0. Its neurotoxicity was lower than all other synthesized compounds and also markedly lower than that of the reference drug carbamazepine. In addition, the potency of compound 4g against seizures induced by pentylenetetrazole, 3-mercaptopropionic acid, and bicuculline suggested its broad spectrum activity, and the mechanisms of action including inhibition of voltage-gated ion channels and modulation of GABAergic activity might involve in its anticonvulsant activity.
合成了两个系列的 8-烷氧基-5-(4H-1,2,4-三唑-4-基)喹啉和 8-烷氧基-5-(2H-1,2,4-三唑-3-酮-4-基)喹啉。这些化合物的抗惊厥活性通过最大电击癫痫发作试验和旋转木马试验进行了评估。在合成的化合物中,8-辛氧基-5-(4H-1,2,4-三唑-4-基)喹啉(4g)是活性最高的化合物,其 ED50 为 8.80 mg/kg,TD50 为 176.03 mg/kg,保护指数为 20.0。其神经毒性低于所有其他合成化合物,也明显低于参考药物卡马西平。此外,化合物 4g 对戊烯四唑、3-巯基丙酸和双库氨酸诱导的癫痫发作的有效作用表明其具有广谱活性,其抗惊厥活性可能涉及抑制电压门控离子通道和调节 GABA 能活性等作用机制。