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. 01, 2009
Filed:
Jun. 18, 2004
Applicants:
Makoto Muto, Tokyo, JP;
Yutaka Kitagawa, Tokyo, JP;
Inventors:
Makoto Muto, Tokyo, JP;
Yutaka Kitagawa, Tokyo, JP;
Assignee:
Daiichi Pharmaceutical Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D 215/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided are a technique for position-selectively introducing an amino group into a difluorobenzoic acid, a novel process for producing a quinolonecarboxylic acid derivative serving as an antibacterial agent, and intermediates in the production. The process comprises treating a compound represented by formula (6): with a base in a water-containing solvent. The intermediates are represented by formula (6):