Synthesis and Angiotensin II Receptor Antagonistic Activities of Benzimidazole Derivatives Bearing Acidic Heterocycles as Novel Tetrazole Bioisosteres
作者:Yasuhisa Kohara、Keiji Kubo、Eiko Imamiya、Takeo Wada、Yoshiyuki Inada、Takehiko Naka
DOI:10.1021/jm960547h
日期:1996.1.1
The design, synthesis, and biological activity of benzimidazole-7-carboxylic acids bearing 5-oxo-1,2,4-oxadiazole, 5-oxo-1,2,4-thiadiazole, 5-thioxo-1,2,4-oxadiazole, and 2-oxo-1,2,3,5-oxathiadiazole rings are described. These compounds were efficiently prepared from the key intermediates, the amidoximes 4. The synthesized compounds were evaluated for in vitro and in vivo angiotensin II (AII) receptor
具有5-氧代-1,2,4-氧二唑,5-氧代-1,2,4-噻二唑,5-硫代氧-1,2,4-的苯并咪唑-7-羧酸的设计,合成及生物学活性描述了恶二唑和2-氧-1,2,3,5-恶二唑环。这些化合物是从关键中间体,胺肟4有效制备的。对合成的化合物的体外和体内血管紧张素II(AII)受体拮抗活性进行了评估。发现大多数对AT1受体具有高亲和力(IC50值为10(-6)-10(-7)M)并抑制AII诱导的升压反应(1 mg / kg po时抑制率超过50%) 。5-氧代-1,2,4-恶二唑,5-氧代-1,2,4-恶二唑和5-硫代-1,2,4-恶二唑衍生物显示出比相应的四唑衍生物更强的抑制作用。绑定亲和力较弱。这可能归因于它们通过增加亲脂性而提高了生物利用度。5-氧-1,2,4-氧二唑衍生物2(TAK-536)和5-氧-1,2,4-噻二唑衍生物8f显示有效的口服生物利用度而不形成前药。这项研究表明5-氧代-1