申请人:KYORIN PHARMACEUTICAL CO., LTD.
公开号:EP0287971A2
公开(公告)日:1988-10-26
Benzimidazole derivatives of the following formula,
wherein R¹ indicates hydrogen atom, lower alkyl group having carbon atoms of 1 to 6 or dimethylaminopropyl group, R² indicates hydrogen atom or lower alkanoyl group having carbon atoms of 1 to 3, R³ indicates hydrogen atom, lower alkyl group having carbon atoms of 1 to 3 or lower alkanoyl group having carbon atoms of 1 to 3, X indicates sulfur atom, sulfinyl group, sulfonyl group, amino group or methylene group, A indicates alkylene group having carbon atoms of 1 to 12, which alkylene group may optionally be substituted by hydroxy group or lower alkyl group having carbon atoms of 1 to 3, - (CHRʹ)n-CRʺ=CRʺ-(CHRʹ)m-,
(in which Rʹ and Rʺ are each independently hydrogen atom, lower alkyl group having carbon atoms of 1 to 3 or hydroxy group, and n and m are equal to 0, 1, 2 or 3), and Y indicates oxygen atom or sulfur atom; their acid or alkali salts and hydrate thereof are useful as antiallergic agents.
下式的苯并咪唑衍生物、
其中 R¹ 表示氢原子、碳原子数为 1-6 的低级烷基或二甲基氨基丙基,R² 表示氢原子或碳原子数为 1-3 的低级烷酰基,R³ 表示氢原子、碳原子数为 1-3 的低级烷基或碳原子数为 1-3 的低级烷酰基、X 表示硫原子、亚砜基、磺酰基、氨基或亚甲基,A 表示具有 1 至 12 个碳原子的亚烷基,该亚烷基可选择被羟基或具有 1 至 3 个碳原子的低级烷基取代,- (CHRʹ)n-CRʺ=CRʺ-(CHRʹ)m- 、
(其中Rʹ和Rʺ各自独立地为氢原子、碳原子数为1至3的低级烷基或羟基,n和m分别等于0、1、2或3),Y表示氧原子或硫原子;它们的酸盐或碱盐及其水合物可用作抗过敏剂。