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:
Nov. 19, 2013
Filed:
Jan. 14, 2010
Tamio Hara, Takaoka, JP;
Naoki Norimatsu, Takaoka, JP;
Hiroaki Kurushima, Takaoka, JP;
Takuya Kano, Takaoka, JP;
Tamio Hara, Takaoka, JP;
Naoki Norimatsu, Takaoka, JP;
Hiroaki Kurushima, Takaoka, JP;
Takuya Kano, Takaoka, JP;
Nippon Soda Co., Ltd., Tokyo, JP;
Abstract
A method for producing a hydroxypyrazine derivative represented by formula (I) (wherein Rrepresents a halogen atom), the method including reacting a pyrazine derivative represented by formula (III) (wherein Rrepresents a nitrile group, an N-unsubstituted or N-substituted carbamoyl group, an ester group or a carboxyl group, M represents a cation capable of forming a salt, and n represents a number corresponding with the valence of M) with a halogenating agent. Also, a method for producing a dichloropyrazine derivative represented by formula (II) (wherein Rrepresents a nitrile group, an N-unsubstituted or N-substituted carbamoyl group, an ester group, a carboxyl group, or a group formed as a result of a change in the functional group of Rduring chlorination), the method including reacting the hydroxypyrazine derivative (I) with a chlorinating agent.