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:
Jul. 05, 2022
Filed:
Sep. 25, 2019
Applicant:
Takasago International Corporation, Tokyo, JP;
Inventor:
Hironori Maeda, Kanagawa, JP;
Assignee:
Takasago International Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 45/62 (2006.01); B01J 21/00 (2006.01); B01J 21/04 (2006.01); B01J 21/06 (2006.01); C07C 45/74 (2006.01);
U.S. Cl.
CPC ...
C07C 45/62 (2013.01); B01J 21/04 (2013.01); B01J 21/066 (2013.01); C07C 45/74 (2013.01);
Abstract
The present invention relates to a method for producing a 3-methylcycloalkenone compound and a method for producing muscone. In the presence of a zirconium oxide catalyst, a diketone represented by the following general formula (1): wherein in formula (1), n represents 8, 9, 10, 11 or 12,is subjected to a vapor-phase intramolecular condensation reaction, whereby a 3-methylcycloalkenone compound can be produced with high reaction efficiency. When a 3-methylcyclopentadecenone compound produced by this method is hydrogenated in a known manner, muscone can be produced efficiently.