| abstract |
The object of the present invention is to provide a compound useful as an intermediate for the production of a pyrazinecarboxamide derivative such as 6-fluoro-3-hydroxy-2-pyrazinecarboxamide. The present invention provides a pyrazino[2,3-d]isooxazole derivative represented by general formula (I) (wherein X represents a halogen atom, a hydroxy group or a sulfamoyloxy group; and Y represents -C(=O)R or -CN (wherein R represents a hydrogen atom, an alkoxy group, an aryloxy group, an alkyl group, an aryl group or an amino group)). |