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:
Jan. 18, 2011
Filed:
Feb. 23, 2006
Hitoshi Sakai, Nakaniikawa-gun, JP;
Masayuki Masumoto, Nakaniikawa-gun, JP;
Jyunji Katsuyama, Nakaniikawa-gun, JP;
Kazuhiro Onogi, Iruma, JP;
Hitoshi Sakai, Nakaniikawa-gun, JP;
Masayuki Masumoto, Nakaniikawa-gun, JP;
Jyunji Katsuyama, Nakaniikawa-gun, JP;
Kazuhiro Onogi, Iruma, JP;
Kowa Co., Ltd., Nagoya-shi, JP;
Abstract
To provide an effective and simple process for producing 4-fluoroisoquinoline-5-sulfonylhalide or a salt thereof, and a simple method for separating for purification of the product from a by-produced position isomer thereof. The process for producing 4-fluoroisoquinoline-5-sulfonyl halide or a salt thereof, characterized in that the process includes reacting 4-fluoroisoquinoline or a salt thereof with sulfuric anhydride in the presence or absence of sulfuric acid, to thereby form 4-fluoroisoquinoline-5-sulfonic acid or a salt thereof, and, subsequently, reacting the formed sulfonic acid compound with a halogenating reagent.