A quantitative structure-activity study of anticonvulsant phenylacetanilides.
作者:CHISAKO YAMAGAMI、NARAO TAKAO、MITSUYO TANAKA、KAZUYOSHI HORISAKA、SYOZO ASADA、TOSHIO FUJITA
DOI:10.1248/cpb.32.5003
日期:——
A series of o-, m-, and p-substituted anilides of phenylacetic acid were tested for anticonvulsant activity in mice by means of the maximal electroshock seizure test and structure-activity relationships were quantitatively studied by Hansch analysis. The potencies (-log ED50) for meta derivatives were shown to depend parabolically on log P (P is the 1-octanol-H2O partition coefficient) and linearly on the Hammett σ values. The derived correlation predicted that the maximum activity would be obtained when log P is about 2. 3 and an electron-donating substituent is introduced. This conclusion is consistent with the structural requirements recently reported for m-and p-substituted benzyl N, N-dimethylcarbamates. Most of the o-and p-substituted compounds exhibited lower activities than m-derivatives. The effects of ortho and para substitutions are discussed.
通过最大电击癫痫发作试验,对一系列邻、间、对取代的苯乙酸苯胺类化合物在小鼠体内的抗惊厥活性进行了测试,并通过汉斯赫分析法对结构-活性关系进行了定量研究。结果表明,元衍生物的药效(-log ED50)与对数 P(P 为 1-辛醇-H2O 分配系数)呈抛物线关系,与 Hammett σ 值呈线性关系。根据推导出的相关性预测,当对数 P 约为 2.3 且引入了一个电子捐赠取代基时,将获得最大活性。这一结论与最近报告的 m 和 p 取代的 N,N-二甲基氨基甲酸苄酯的结构要求一致。大多数 o 和 p 取代的化合物的活性低于 m 衍生物。本文讨论了正对和对位取代的影响。