substituents. Only small groups were tolerated at C5, C6, or C7, with the C6 analogues being preferred. The most potent N3-substituent was 5-chlorothiophene-2-sulfonamide. N1 meta-substituted benzyl groups possessing an α-amino-3-[(methylamino)acyl]– group were the most potent N1-substituents. Strongly basic amino groups had low oral absorption in vivo. Less basic analogues, such as morpholines, had good oral
合成了一系列
吲唑芳基磺酰胺,并作为人CCR4拮抗剂进行了研究。含甲氧基或羟基的是更有效的
吲唑C4取代基。在C5,C6或C7处只容忍少数人,优选C6类似物。最有效的N 3取代基是5-
氯噻吩-2-磺酰胺。具有α-
氨基-3-[(甲基
氨基)酰基]-基团的N 1间位取代的苄基是最有效的N 1取代基。强碱性
氨基在体内的口服吸收率低。诸如吗啉之类的碱性较低的类似物具有良好的口服吸收。但是,它们的间隙也很高。在两个物种中吸收最强的化合物是类似物6(GSK2239633A),已被选择进行进一步开发。芳基磺酰胺拮抗剂在表示为位点II的细胞内变构位点结合CCR4。对两个
吲唑磺酰胺片段的X射线衍射研究表明,在活性构象中存在重要的分子内相互作用。