申请人:Hokuriku Pharmaceutical Co., Ltd.
公开号:US04792547A1
公开(公告)日:1988-12-20
Novel pyrazine derivatives useful for treatment of bronchial asthma, allergic gastorenteric trouble, hay fever urticaria, allertic rhinitis, and allergic conjunctivitis, and pharmaceutical compositions thereof, are disclosed. The compounds have the formula I as follows: ##STR1## wherein R represents hydrogen or ##STR2## wherein R.sub.1 and R.sub.2 may be the same or different and each independently represents hydrogen, straight or branched-chain lower-alkyl, or cycloalkyl having three to six carbon atoms inclusive, phenyl which may be substituted with halogen, lower-alkyl, or lower-alkoxy, or wherein R.sub.1 and R.sub.2 together represent alkylene of four to six carbon atoms, inclusive, optionally interrupted by one or two nitrogen atoms or one oxygen atom and said ring being optionally substituted by straight or branched-chain lower-alkyl having one to six carbon atoms inclusive, hydroxy, or phenyl, and pharmaceutically-acceptable salts thereof.
本发明揭示了用于治疗支气管哮喘、过敏性胃肠障碍、花粉热性荨麻疹、过敏性鼻炎和过敏性结膜炎的新型吡嗪衍生物及其制药组合物。该化合物的化学式如下:##STR1## 其中R表示氢或##STR2## 其中R.sub.1和R.sub.2可以相同也可以不同,并且分别独立地表示氢、直链或支链低碳基、或含有三至六个碳原子的环烷基,苯基可以被卤素、低碳基或低碳氧基取代,或者R.sub.1和R.sub.2共同表示四到六个碳原子的烷基,可以被一个或两个氮原子或一个氧原子中断,该环可以被直链或支链低碳基(包括1-6个碳原子)、羟基或苯基取代,以及其药学上可接受的盐。