6-BROMO-3-HYDROXY-2-PYRAZINECARBOXAMIDE CRYSTAL AND METHOD FOR PRODUCING SAME

6-BROMO-3-HYDROXY-2-PYRAZINECARBOXAMIDE CRYSTAL AND METHOD FOR PRODUCING SAME

The purpose of the present invention is to provide a method for producing 6-bromo-3-hydroxy-2-pyrazinecarboxamide in which the content ratio of impurities is reduced. This production method includes a step of obtaining 6-bromo-3-hydroxy-2-pyrazinecarboxamide crystal having diffraction angles express...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: UCHIDA Tetsuro, KOBAYASHI Yuta, TSUZUKI Takayoshi, OKUBO Yusuke, UEHARA Sayuri, KOSEKI Yu
Format: Patent
Sprache:eng ; slv
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:The purpose of the present invention is to provide a method for producing 6-bromo-3-hydroxy-2-pyrazinecarboxamide in which the content ratio of impurities is reduced. This production method includes a step of obtaining 6-bromo-3-hydroxy-2-pyrazinecarboxamide crystal having diffraction angles expressed in degrees 2¸ of 5.5, 20.1, 23.7, 26.7, 27.5, and 28.1° and/or diffraction angles expressed in degrees 2¸ of 7.1, 21.4, 25.2, 25.7, 27.1, and 28.8° in powder X-ray diffraction.