Studies on benzenesulfonamide derivatives with .ALPHA.- and .BETA.-adrenergic antagonistic and antihypertensive activities.
作者:TAKASHI FUJIKURA、KUNIHIRO NIIGATA、SHINICHI HASHIMOTO、KAZUO IMAI、TOICHI TAKENAKA
DOI:10.1248/cpb.30.4092
日期:——
New α-and β-adrenergic blockers, benzenesulfonamide derivatives (Ia-z), were prepared from acetylbenzenesulfonamides (II) by two methods. These compounds were tested for α-and β-blocking activities and their structure-activity relationships are discussed. All the target compounds have two asymmetric centers and therefore consist of two diastereomers. 5-[1-Hydroxy-2-[3-(2-methoxyphenyl)-1-methylpropylamino]ethyl]-2-methylbenzenesulfonamide (Ir) and 5-[1-hydroxy-2-[2-2-(2-methoxyphenoxy)-1-methylethylamino] ethyl]-2-methylbenzenesulfonamide (Iu) showed potent α-and β-blocking activities and they were each separated into two diastereomers (Ir-A and Ir-B, and Iu-A and Iu-B). It was found that one isomer had mainly β-blocking activity and the other isomer had mainly α-blocking activity. In addition, several compounds showing relatively strong α-and β-blocking activities were also examined for antihypertensive activity in conscious spontaneously hypertensive rats. Among the compounds tested, Ir and Iu were the most active, and they were more potent than labetalol. Compounds Ir and Iu may be of practical use as potent antihypertensive agents.
通过两种方法从乙酰苯磺酰胺类化合物(II)制备了新型α和β肾上腺素能阻断剂苯磺酰胺衍生物(Ia-z)。对这些化合物进行了α和β阻断活性测试,并讨论了它们的结构-活性关系。所有目标化合物都有两个不对称中心,因此由两种非对映异构体组成。5-[1-羟基-2-[3-(2-甲氧基苯基)-1-甲基丙氨基]乙基]-2-甲基苯磺酰胺(Ir)和 5-[1-羟基-2-[2-2-(2-甲氧基苯氧基)-1-甲基乙基氨基]乙基]-2-甲基苯磺酰胺(Iu)显示了强效的α和β-阻断活性,并分别被分离成两种非对映异构体(Ir-A 和 Ir-B 以及 Iu-A 和 Iu-B)。结果发现,一种异构体主要具有 β-阻断活性,而另一种异构体主要具有 α-阻断活性。此外,研究人员还对几种具有较强α和β阻断活性的化合物进行了研究,以观察它们在有意识的自发性高血压大鼠体内的降压活性。在测试的化合物中,Ir 和 Iu 的活性最高,它们比拉贝洛尔更强。Ir和Iu化合物作为强效降压药可能具有实用价值。