activity were identified. This study suggested the metabolic pathways of 1 were considerably affected by species. Consequently, structural modification of 1 intended to improve the complexity of the metabolic pathway, and water solubility was performed. The subsequent introduction of a hydroxyl group into the tert-butyl moiety of 1 led to the discovery of our new clinical candidate, 6b, which showed
在上一篇文章中,(1)我们概述了有效的选择性ET(A)受体拮抗剂1及其相关化合物的发现及其与构效关系。鉴定出具有有效的选择性ET(A)受体拮抗剂活性的1的代谢物。这项研究表明1的代谢途径受物种的影响很大。因此,进行了结构修饰1以改善代谢途径的复杂性和
水溶性。随后在1的叔丁基部分引入羟基导致了我们新的临床候选物6b的发现,该候选物显示出更高的
水溶性,物种间统一的代谢途径以及对人类的极高亲和力和选择性ET(A)受体(ET(A)受体的K(i):0.015 +/- 0.004 nM; ET(B)受体的K(i):41 +/- 21 nM)。