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:
May. 18, 2010
Filed:
Apr. 07, 2006
Kengo Kawasaki, Tokushima, JP;
Takayuki Ikeda, Tokushima, JP;
Takeshi Sekine, Tokushima, JP;
Norio Fukuda, Tokushima, JP;
Kengo Kawasaki, Tokushima, JP;
Takayuki Ikeda, Tokushima, JP;
Takeshi Sekine, Tokushima, JP;
Norio Fukuda, Tokushima, JP;
Otsuka Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
The invention provides an improved process for preparing a carbostyril compound (1) or a salt thereof that is useful as a medicament, which makes it possible to prepare it more safely and efficiently. In more detail, the invention provides an improved process for preparing the carbostyril compound (1) by heating the compound (4) with a high boiling solvent in hydrochloric acid under reflux to give the compound (5) safely; and then acylating the compound (5).