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. 08, 2012
Filed:
Mar. 14, 2007
Applicants:
Kazuo Tanaka, Niigata, JP;
Yoshifumi Sato, Niigata, JP;
Takafumi Yoshimura, Niigata, JP;
Inventors:
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 239/72 (2006.01);
U.S. Cl.
CPC ...
Abstract
In reacting an anthranilic acid derivative represented by the general formula (1), especially the anthranilic acid derivative selected from anthranilic acid, anthranilamide and anthranilate, with formamide, the reaction is attained under the condition of coexistence of acetic acid and a base as a catalyst in the reaction liquid, and it has made it possible to produce a quinazolin-4-one derivative represented by the general formula (2) and useful as a material for medicine intermediates, at high yield with no side production.