doses of 3-20 mg kg-1 po, showed good antinociceptive activity, reducing by more than 50% the number of writhes with respect to controls. Compounds 16c, 19a, 20a, and 28 were the most potent of the series because they were able to induce a potent antinociceptive effect at a dose of 3 mg kg-1 po. None of the active compounds at the analgesic dose provoked any visible change in normal behavior, as demonstrated
合成了许多4-
氨基-5-
乙烯基吡啶酮酮和4-
氨基-5-杂环
吡啶酮酮,并测试了它们的镇痛活性。以3-20 mg kg-1 po的剂量测试的许多这些化合物均显示出良好的抗伤害感受活性,相对于对照而言,减少了超过50%的扭伤次数。化合物16c,19a,20a和28是该系列中最有效的化合物,因为它们能够以3 mg kg-1 po的剂量诱导有效的镇痛作用。如旋转仪测试所示,在镇痛剂量下,没有一种活性化合物引起正常行为的任何可见变化。作用机理的研究表明,用α2-拮抗剂
育亨宾预处理可以完全阻止由活性化合物引起的镇痛作用,这表明α2-
肾上腺素能受体的参与。