报道了一系列新的小分子配体的合成和AT 1 R 和AT 2 R 结合数据。这些配体包含苯基噻唑支架,而不是在基本上所有先前描述的源自非选择性 AT 1 R/AT 2 R 配体 L-162,313 和 AT 2 R 选择性激动剂 C21 的配体中发现的联苯或苯基噻吩支架,后者现在在II/III 期临床试验。AT 2 R 选择性激动剂 C21 和 AT 2 R 选择性拮抗剂 C38中存在的苯基噻唑而非苯基噻吩支架对 AT 2的亲和力具有有害影响R. 然而,通过在通过亚甲基桥连接到苯基噻唑支架的咪唑环的 2 位引入一个小的庞大烷基,可以实现显着的改进。因此,2-叔丁基或2-异丙基和丁氧羰基的组合提供了有效的AT 2 R选择性配体。此外,鉴定了一种源自 L-162,313 且对 AT 1 R 表现出 > 35 倍选择性的高亲和力配体 ( 10 )。具有 2-叔丁基的配体21对 AT 2的选择性约为
Biphenylsulfonamide Endothelin Receptor Antagonists. 2. Discovery of 4‘-Oxazolyl Biphenylsulfonamides as a New Class of Potent, Highly Selective ET<sub>A</sub> Antagonists
作者:Natesan Murugesan、Zhengxiang Gu、Philip D. Stein、Steven Spergel、Arvind Mathur、Leslie Leith、Eddie C.-K. Liu、Rongan Zhang、Eileen Bird、Tom Waldron、Anthony Marino、Richard A. Morrison、Maria L. Webb、Suzanne Moreland、Joel C. Barrish
DOI:10.1021/jm000105c
日期:2000.8.1
The synthesis and structure-activityrelationship (SAR) studies of a series of 4'-oxazolyl-N-(3,4-dimethyl-5-isoxazolyl)[1, 1'-biphenyl]-2-sulfonamide derivatives as endothelin-A (ET(A)) receptorantagonists are described. The data reveal a remarkable improvement in potency and metabolic stability when the 4'-position of the biphenylsulfonamide is substituted with an oxazole ring. Additional 2'-substitution
Structural alterations to the benzylic position of the first drug-like selective angiotensin II AT(2) receptor agonist (1) have been performed, with the emphasis to reduce the CYP 450 inhibitory property of the initial structure. The imidazole moiety, responsible for the CYP 450 inhibitory effect in 1, was replaced with various heterocycles. In addition, the modes of attachment of the heterocycles, that is, carbon versus nitrogen attachment, and introduction of carbonyl functionalities to the benzylic position have been evaluated. In all the three series, AT(2) receptor ligands with affinity in the lower nanomolar range were identified. None of the analogues, regardless of the substituents, exhibited any affinity for the AT(1) receptor. Compounds with substantially reduced inhibition of the CYP 450 enzymes were obtained. Among them the compound 60 was found to induce neurite elongation in NG 108-15 cells and served as potent AT(2) selective agonist. (C) 2010 Elsevier Ltd. All rights reserved.
Substituted isoxazole sulfonamides and their use as endothelin antagonists