Abstract
A series of new 8-alkoxy-1,3-dimethyl-2,6-dioxopurin-7-yl-substituted acetohydrazides and butanehydrazides 6–12 was synthesized and evaluated for the analgesic activity in two in vivo models: the writhing syndrome and the hot-plate tests. Among the investigated derivatives, compounds with N′-arylidenehydrazide moiety 9–12 show analgesic activity significantly higher than that of acetylsalicylic acid, which may indicate the importance of this structural element for analgesic properties. The lack of the activity in the hot-plate test may suggest that the analgesic activity of the newly synthesized compounds is mediated by a peripheral mechanism. The selected compounds 7 and 12 inhibit tumor necrosis factor α production in a rat model of lipopolysaccharide-induced endotoxemia, similarly to theophylline, which may confirm their anti-inflammatory properties.
摘要
合成了一系列新的8-烷氧基-1,3-二甲基-2,6-二氧杂嘌呤-7-基取代乙酰肼和丁酰肼化合物6–12,并在两个in vivo模型中评估其镇痛活性:扭体综合征和热板测试。在所研究的衍生物中,具有N′-芳香亚甲基肼基的化合物9–12的镇痛活性明显高于乙酰水杨酸,这可能表明这种结构元素对镇痛性质的重要性。在热板测试中缺乏活性可能表明新合成的化合物的镇痛活性是通过外周机制介导的。选择的化合物7和12在脂多糖诱导的内毒素血症大鼠模型中抑制肿瘤坏死因子α的产生,类似于茶碱,这可能证实它们的抗炎性质。