Synthesis and analgesic effects of 3-substituted 4,6-diarylpyridazine derivatives of the arylpiperazine class
作者:Florence Rohet、Catherine Rubat、Pascal Coudert、Jacques Couquelet
DOI:10.1016/s0968-0896(97)00006-0
日期:1997.4
A new series of 4,6-diaryl pyridazines substituted in the 3-position by arylpiperazinyl moieties was synthesized and evaluated for analgesic activity. Five out of the nine tested compounds possessed significant antinociceptive effects in the phenylbenzoquinone-induced writhing test (PBQ test) with ED50 values ranging from 26.0 to 37.7 mg/kg ip. The most active derivatives 2a, 2d and 2h had a low toxicity
合成了在3-位被芳基哌嗪基部分取代的一系列新的4,6-二芳基哒嗪,并评估了其镇痛活性。在苯基苯醌诱导的扭体试验(PBQ试验)中,九种被测化合物中有五种具有显着的抗伤害作用,ED50值为26.0至37.7 mg / kg ip。活性最高的衍生物2a,2d和2h毒性低(LD50> 800 mg / kg ip),但从50 mg / kg ip剂量显示出镇静和神经毒性作用。在热板测试中,三种选择的哒嗪没有活性。但是,在PBQ测试中,纳洛酮显着逆转了2d和2h的镇痛活性。以5 mg / kg ip的低剂量腹膜内注射2h,可大大增强吗啡(0.15 mg / kg sc)诱导的抗伤害感受性反应。此外,镇痛作用为2h(2。5羟基/色氨酸与卡比多巴联合也可增强5 mg / kg ip的剂量)。这些结果表明哒嗪2h诱导镇痛作用,这是通过阿片样物质和血清素能机制介导的。