The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2019
Filed:
Mar. 05, 2019
Fujifilm Toyama Chemical Co., Ltd., Chuo-ku, JP;
Tetsuro Uchida, Toyama, JP;
Sayuri Uehara, Toyama, JP;
Takayoshi Tsuzuki, Toyama, JP;
Yusuke Okubo, Toyama, JP;
Yuta Kobayashi, Toyama, JP;
Yu Koseki, Toyama, JP;
FUJIFILM Toyama Chemical Co., Ltd., Chuo-ku, JP;
Abstract
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 2θ of 5.5, 20.1, 23.7, 26.7, 27.5, and 28.1° and/or diffraction angles expressed in degrees 2θ of 7.1, 21.4, 25.2, 25.7, 27.1, and 28.8° in powder X-ray diffraction.