2-[N'-(3-Arylallylidene)hydrazino]adenosines Showing A2a Adenosine Agonist Properties and Vasodilation Activity
作者:Monica Viziano、Ennio Ongini、Anna Conti、Cristina Zocchi、Monica Seminati、Donato Pocar
DOI:10.1021/jm00018a017
日期:1995.9
A2a receptor, the K(i) value being 23 nM. The type and position of substituents on the phenyl ring show a moderate influence on biological activity, allowing the conclusion that the latter is mostly due to the allylidenehydrazino side chain. From functional experiments 2-[N'-(2-furylmethylidene)hydrazino]adenosine (4b), 2-[N'-(3-phenylallylidene)hydrazino]adenosine (5a) and 2-[N'-[3-(2-furyl)allyl
制备了一系列2- [N'-(3-芳基亚芳基)肼基]腺苷,并在结合和功能测定中进行了研究,以评估它们与A1腺苷受体相比对A2a的效力。这些类似物在低纳摩尔范围内具有与A1受体的弱相互作用相关的A2a受体亲和力。在这些化合物中,在大鼠组织中,2- [N'-[3-(4-硝基苯基)亚烷基]肼基腺苷(5g)对A2a受体具有最强的亲和力,K(i)值为23 nM。苯环上取代基的类型和位置对生物活性显示中等程度的影响,可以得出这样的结论,即后者主要归因于烯丙基肼基侧链。从功能实验中,2- [N'-(2-呋喃基亚甲基)肼基]腺苷(4b),2- [N'-(3-苯基亚烷基)肼基]腺苷(5a)和2- [N' -[3-(2-呋喃基)亚烷基]肼基]腺苷(5b)似乎有效诱导血管舒张(A2a介导的反应),而对心率没有明显影响(A1介导的作用)。虽然对心率缺乏影响可以通过对A1受体的亲和力差来清楚地解释,但对某