A number of 2, 6-di-tert-butylphenols with a heterocyclic group at the 4-position were prepared. The heterocyclic groups were as follows : benzoxazole, benzothiazole, benzimidazole, indole, imidazo [1, 2-a] pyridine and imidazo [1, 2-a] pyrimidine. Anti-inflammatory activity of these compounds was examined by using the adjuvant-induced arthritis (A. A) assay. Some compounds were further tested in carrageenin-induced rat paw edema (CIPE) assay and AcOH-induced writhing (AIW) assay in mice. The anti-inflammatory activity was greatly dependent on the value of the heterocyclic group. Among these compounds, 2-(3, 5-di-tert-butyl-4-hydroxyphenyl)-benzoxazole (IIa) and 2-(3, 5-di-tert-butyl-4-hydroxyphenyl) indole (Xg) showed very potent activity. Both IIa and Xg had a minimum effective dose of 5 mg/kg (p. o.) in A. A assay and showed stronger activity than phenylbutazone in CIPE assay but weaker analgesic activity than aminopyrine in AIW assay.
制备了一系列在4位含有杂环基团的
2,6-二叔丁基苯酚。这些杂环基团包括:
苯并
噁唑、
苯并噻唑、
苯并咪唑、
吲哚、
咪唑[1,2-a]
喹啉和
咪唑[1,2-a]
嘧啶。这些化合物的抗炎活性通过佐剂诱导的关节炎(A.A)测定进行评估。部分化合物在
卡拉胶诱导的大鼠足肿胀(
CIPE)测定和
醋酸诱导的小鼠扭动(AIW)测定中进一步测试。这些化合物的抗炎活性在很大程度上取决于杂环基团的性质。在这些化合物中,2-(3,5-二叔丁基-
4-羟基
苯基)
苯并
噁唑(IIa)和2-(3,5-二叔丁基-
4-羟基
苯基)
吲哚(Xg)表现出非常强的活性。IIa和Xg在A.A测定中的最小有效剂量为5 mg/kg(口服),在
CIPE测定中显示出比
苯基布托松更强的活性,但在AIW测定中的镇痛活性则弱于
氨基吡啶。