Synthesis and pharmacological activity of 8-aryl-3,4-dioxo-2H,8H-6,7-dihydroimidazo[2,1-c] [1,2,4]triazines (A) are presented. The title compounds were obtained from 1-aryl-2-hydrazinoimidazolines (1) by cyclization reaction with ethyl oxalate (2). They were tested for pharmacological activity in behavioral animal tests (A1, A3, A5, A6, A8, A9). With relatively low acute toxicity (LD50 in range from
介绍了8-芳基-3,4-二氧代-2H,8H-6,7-二氢
咪唑并[2,1-c]
[1,2,4]三嗪(A)的合成和药理活性。通过与
草酸乙酯(2)的环化反应从1-芳基-2-
肼基
咪唑啉(1)获得标题化合物。在行为动物试验(A1,A3,A5,A6,A8,A9)中对它们的药理活性进行了测试。急性毒性较低(LD50在1100至超过2000 mg kg(-1),腹膜内,ip),其中一些表现出显着的抗伤害感受活性,这表明了“扭体”试验的结果。分别在12.5-200 mg(0.00625-0.1 LD50)和37.5-150 mg(0.025-0.1 LD50)的剂量下观察到对化合物A8特别强的抗伤害感受和对A6显着的抗伤害感受。“扭动”中产生的A1和A8抗伤害感受的还原 用5 mg kg(-1)剂量的
纳洛酮进行的试验可表明其镇痛活性类似阿片样物质的机制。另外,化合物A9减少了5-羟色
氨酸(
5-HTP)给药后