Pyrazine derivatives represented by general formula [1]:
wherein the variables are as defined in the specification, or salts thereof have an excellent antiviral activity and are useful as a therapeutic agent for treating viral infections.
Further, fluoropyrazine-carboxamide derivatives represented by general formula [2]:
wherein the variables are as defined in the specification, or salts thereof are useful as an intermediate for production of the compounds of general formula [1], and as an intermediate for production of the fluoropyrazine-carboxamide derivatives of which one typical example is 6-fluoro-3-hyroxy-2-pyrazine-carboxamide having an antiviral activity.
通式[1]代表的
吡嗪衍
生物:
其中的变量如说明书中所定义,或其盐类具有优异的抗病毒活性,可作为治疗病毒感染的治疗剂。
此外,通式[2]代表的
氟吡嗪甲酰胺衍
生物:
其中的变量如说明书中所定义,或其盐类可用作生产通式[1]化合物的中间体,也可用作生产
氟吡嗪-甲酰胺衍
生物的中间体,其中一个典型的例子是具有抗病毒活性的6-
氟-3-羟基-2-
吡嗪-甲酰胺。