Synthesis and antihypertensive activity of stereoisomers of 4-piperidyl-1,3-dihydro-2-oxo-2H-benzimidazoles. Enhanced potencies of (+)-isomers
作者:Yutaka Kasuya、Koki Shigenobu、Makiko Hashikami、Naoko Karashima、Hiroyuki Obase、Haruki Takai、Masayuki Teranishi、Akira Karasawa、Kazuhiro Kubo
DOI:10.1021/jm00356a016
日期:1983.2
Threo isomers 1 and 3 were resolved via diastereomeric carbamates. Erythro isomer 2 was obtained by an oxidation and reduction sequence from optically active 1. No significant difference was found between the pharmacological activities of the threo and erythro isomers of the corresponding compounds. However, a clear difference was found between the pharmacological activities of the optical isomers. Difference
为了阐明药理活性和立体化学结构之间的关系,我们解析了1- [2-(3-,4,5-三甲氧基苯基)-2-羟基-1-甲基乙基] -4-(1,3-二氢-2-氧代2H-苯并咪唑-1-基)哌啶(1和2)和1- [2-(3,4-二甲氧基苯基)-2-羟基-1-甲基乙基] -4-(1,3-二氢-2-氧代2H-苯并咪唑基)哌啶(3),主要通过其α阻断作用产生降压作用。苏式异构体1和3通过非对映氨基甲酸酯拆分。通过氧化和还原序列从旋光活性物质1获得赤型异构体2。在相应化合物的苏型和赤型异构体的药理活性之间未发现显着差异。但是,发现旋光异构体的药理活性之间存在明显差异。在血压正常的大鼠的降压作用和离体大鼠输精管的α-肾上腺素阻断活性中最清楚地显示出差异。在这些作用中,(+)异构体总是比相应的(-)异构体更有效。