申请人:Kyorin Pharmaceutical Co., Ltd.
公开号:US04942245A1
公开(公告)日:1990-07-17
Benzimidazole derivatives of the following formula, ##STR1## wherein R.sup.1 indicates hydrogen atom, lower alkyl group having carbon atoms of 1 to 6 or dimethylaminopropyl group, R.sup.2 indicates hydrogen atom or lower alkanoyl group having carbon atoms of 1 to 3, R.sup.3 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, --(CHR')N--CR".dbd.CR"--(CHR')M--, ##STR2## (in which R' and R" 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.
苯并咪唑衍生物的化学式如下,其中R.sup.1表示氢原子,具有1到6个碳原子的低碳烷基或二甲氨基丙基基团,R.sup.2表示氢原子或具有1到3个碳原子的低烷酰基团,R.sup.3表示氢原子,具有1到3个碳原子的低碳烷基或具有1到3个碳原子的低烷酰基团,X表示硫原子、亚砜基、磺酰基、氨基或亚甲基基团,A表示具有1到12个碳原子的烷基基团,该烷基基团可以选择性地被羟基或具有1到3个碳原子的低烷基基团取代,--(CHR')N--CR".dbd.CR"--(CHR')M--,(其中R'和R"各自独立表示氢原子、具有1到3个碳原子的低烷基或羟基,n和m等于0、1、2或3)和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药物。