Novel pyrazine derivatives or salts thereof, pharmaceutical composition containing the same, and production intermediates thereof
申请人:Toyama Chemical Co., Ltd.
公开号:US20030130213A1
公开(公告)日:2003-07-10
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.
1
wherein each of R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
, R
9
and A has the same meaning as given in the specification.
The present invention relates to a method for exhibiting a virus growth-inhibiting effect and/or a virucidal effect, in which pyrazine nucleotide analog [2] and pyrazine nucleoside analog [3z] are subjected to biotransformation, decomposed and then phosphorylated, so that they become a pyrazine nucleotide analog [1b] exhibiting the aforementioned effect. This method is useful as a method for treating virus infections. Moreover, the pyrazine carboxamide analog or a salt thereof of the present invention is useful as an agent for preventing or treating virus infections.
Pyrazine derivatives or salts thereof, pharmaceutical composition containing the same, and production intermediates thereof
申请人:Toyama Chemical Co., Ltd.
公开号:US06800629B2
公开(公告)日:2004-10-05
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.