Pyrazine derivatives represented by general formula [1]:
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]:
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.
                            通式为[1]:1的
吡嗪衍
生物,其中变量如规范中所定义,或其盐具有出色的抗病毒活性,可用作治疗病毒感染的治疗剂。此外,通式[2]:2的
氟代
吡嗪羧酰胺衍
生物,其中变量如规范中所定义,或其盐可用作通式[1]:1化合物的生产中间体,以及用于生产
氟代
吡嗪羧酰胺衍
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-
吡嗪羧酰胺。