Propranolol is a popular β adrenergic antagonists that, together with pindolol, binds also to serotoninergic receptors, namely 5-HT1A/B. In this work the rigidification of the propranolol structure by locking its hydroxyl group within a 1,3-dioxolane ring was investigated. Constrained derivatives of propranolol were synthesized, fully characterized and tested for their affinity at β-adrenoreceptors and 5-HT1A/B/C receptors using radioligand binding assay. The constrained derivatives were inactive, as expected, at β1/2/3 adrenergic receptors. Although less expected, these derivatives failed to bind also to 5-HT1A/B/C receptors. The rigidification of propranolol is detrimental for 5-HT1AR activity.
普萘洛尔是一种常用的β
肾上腺素能拮抗剂,它与
吲哚洛尔一起也能与
血清素能受体(即 5-HT1A/B)结合。这项研究通过将
普萘洛尔结构中的羟基锁定在一个 1,3- 二
氧戊环上,对其结构的刚性进行了研究。研究人员合成了
普萘洛尔的受限衍
生物,对其进行了全面表征,并利用放射性
配体结合试验测试了它们与 β
肾上腺素受体和 5-HT1A/B/C 受体的亲和力。正如预期的那样,受约束的衍
生物在 β1/2/3
肾上腺素受体上没有活性。这些衍
生物也未能与 5-HT1A/B/C 受体结合,但这并不符合预期。
普萘洛尔的僵化不利于 5-HT1AR 的活性。