| abstract |
The object of the present invention is to provide compounds useful as intermediates in the production of pyrazinecarboxamide derivatives such as 6-fluoro-3-hydroxy-2-pyrazinecarboxamide. The present invention provides pyrazino[2,3-d]iso Azole derivatives (where X represents a halogen atom, hydroxyl or sulfamoyloxy, and Y represents -C(=O)R or -CN (wherein R represents a hydrogen atom, alkoxy, aryloxy, alkyl, aryl radical or amino)). Formula (I) |