Synthesis and .ALPHA.-Adrenergic Binding Ligand Affinities of 2-Iminoimidazolidine Derivatives.
作者:Jean Chang FONG、Khalid BENAMOUR、Barbara SZYMONSKI、Francois THOMASSON、Jean-Marc MORAND、Max CUSSAC
DOI:10.1248/cpb.48.729
日期:——
In order to obtain possible veinotonic drugs acting through α2 receptor activation, we prepared clonidine analogues in which the 2-imino-imidazolidine was attached to various aliphatic or aromatic heterocycles. Among them, the two benzopyranic derivatives 16 and 22 exhibited interesting affinities (19 and 95 nM respectively on [3H]rauwolscine binding, compared to 35 nM for clonidine). Their affinity for α1 receptors was found to be much lower : 7570 and 5030 nM for 16 and 22 respectively, suggesting 16 to be 400 times more selective for α2 than for α1-adrenoceptors.
为了获得可能通过α2受体激活发挥作用的静脉活性药物,我们合成了克洛尼定类似物,其中2-亚氨基咪唑烷与各种脂肪族或芳香族杂环相连。在这些化合物中,两个苯并吡喃衍生物16和22表现出了有趣的亲和力(分别为19和95 nM,与克洛尼定的35 nM相比)。它们对α1受体的亲和力则低得多:16和22分别为7570和5030 nM,这表明16对α2受体的选择性是对α1肾上腺素受体的400倍。