Flavones. 2. Synthesis and structure-activity relationship of flavodilol and its analogs. A novel class of antihypertensive agents with catecholamine depleting properties
作者:E. S. C. Wu、T. E. Cole、T. A. Davidson、M. A. Dailey、K. G. Doring、M. Fedorchuk、J. T. Loch、T. L. Thomas、J. C. Blosser
DOI:10.1021/jm00121a034
日期:1989.1
(3-Phenyl-7-flavonoxy)propanolamines have been shown to exhibit antihypertensive activity in spontaneously hypertensive rats. Although they are structurally similar to classical beta-adrenergic blocking compounds, their activity is not due to inhibition of beta-adrenoceptors. In the present study, a series of simple flavonoxypropanolamines was prepared to further explore the structural requirements for the antihypertensive effect of these compounds. A structure-activity relationship of these derivatives indicates that the position of the oxypropanolamine side chain, the hydroxy group of the side chain, steric bulkiness and length of N substituents, degree of the N-substitution, phenyl group at the 2-position of the chromone nucleus, and substituents of the phenyl group or B ring of the flavone play significant roles in imparting pharmacological effects. In addition, there is a good correlation between the antihypertensive activity and depletion of myocardial norepinephrine. Of these analogues tested, the most effective one was flavodilol. Only the 8-substituted analogue 6 was found to be a beta-antagonist. Flavodilol was chosen for in-depth pharmacological, toxicological, and clinical evaluation.
含有(3-苯基-7-黄酮氧基)丙醇胺结构的化合物已被证明在自发性高血压大鼠中表现出抗高血压活性。尽管它们在结构上与经典的β-肾上腺素能阻断剂类似,但其活性并非由于β-肾上腺素受体的抑制。在本研究中,制备了一系列简单的黄酮氧基丙醇胺衍生物,以进一步探索这些化合物抗高血压效应的结构要求。这些衍生物的结构-活性关系研究表明,氧基丙醇胺侧链的位置、侧链上的羟基、N-取代基的立体位阻和长度、N取代的程度、色原核2位上的苯基基团,以及黄酮苯基或B环上的取代基在赋予药理效应方面起着重要作用。此外,抗高血压活性与心肌去甲肾上腺素的耗竭之间存在良好的相关性。在所有测试的类似物中,最有效的化合物是flavodilol。只有8-取代类似物6被发现是β-受体拮抗剂。Flavodilol被选中进行深入的药理学、毒理学和临床评估。