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. 08, 2013
Filed:
Jun. 25, 2009
Applicants:
Takayoshi Ando, Yokkaichi, JP;
Norio Adachi, Kusatsu, JP;
Akihiro Isogai, Kusatsu, JP;
Inventors:
Assignee:
Ishihara Sangyo Kaisha, Ltd., Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D 333/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for producing 3-methyl-2-thiophenecarboxylic acid is provided. A method for producing 3-methyl-2-thiophenecarboxylic acid, which comprises reacting a compound represented by the formula (I): (wherein X is a chlorine atom or a bromine atom) with magnesium in the presence of an alkyl halide to give a Grignard reagent represented by the formula (II): (wherein X is the same as defined above), reacting the Grignard reagent of the formula (II) with carbon dioxide, and acidifying the reaction product.