Nine series of ω-substituted PAS alkyl esters, namely, ω-chloroalkyl, ω-aminoalkyl, ω-diethylaminoalkyl, ω-phenylethylaminoalkyl, ω-morpholinoalkyl, ω-pyrrolidinylalkyl, ω-piperidinoalkyl p-aminosalicylates and alkylene bis-p-aminosalicylates in which the alkyl length varied from ethyl to decyl were synthesized and their evaluations were made with testing their tuberculostatic activities and with measuring their physicochemical properties such as partition coefficients and degrees of protein binding that might considerably influence biological effects of these substances when administered in animal body. These synthesized derivatives have activities as same extent as the parent compound and are more lipid soluble and some of them are less protein bound than PAS. From these observations, it is considered that some of the defects of the parent compound are improved by these chemical modifications. Relationship between structures and these characteristics are also revealed.
九系列ω-取代对
氨基
水杨酸烷基酯,即ω-
氯代烷基、ω-
氨基烷基、ω-二乙
氨基烷基、ω-苯乙
氨基烷基、ω-吗啉代烷基、ω-
吡咯烷基烷基、ω-
哌啶基烷基对
氨基
水杨酸盐及烷撑双对
氨基
水杨酸酯,其中烷基长度从乙基至癸基变化,已被合成并进行了评估。评估包括测试它们的抗结核活性以及测定它们的物理
化学性质,如分配系数和蛋白质结合程度,这些性质可能在动物体内给药时显著影响这些物质的
生物效应。这些合成的衍
生物具有与母体化合物相同程度的活性,并且脂溶性更高,其中一些的蛋白质结合程度低于PAS。从这些观察结果来看,可以认为通过这些
化学修饰改善了母体化合物的一些缺陷。同时揭示了结构与这些特性之间的关系。