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:
Mar. 01, 2005
Filed:
Mar. 28, 2001
Yoo Tanabe, Nishinomiya, JP;
Atsushi Makita, Toda, JP;
Yoo Tanabe, Nishinomiya, JP;
Atsushi Makita, Toda, JP;
Japan Energy Corporation, Tokyo, JP;
Abstract
Disclosed are a process of subjecting a diester of a long-chain dicarboxylic acid having 18 to 21 carbon atoms to intramolecular condensation in the presence of titanium tetrachloride or zirconium tetrachloride and a trialkylamine to form an α-alkoxycarbonylated macrocyclic ketone, and a process for producing a macrocyclic ketone by hydrolyzing an α-alkoxycarbonylated macrocyclic ketone obtained by the process and then subjecting the hydrolyzate to decarboxylation. The invention provides a process for producing a macrocyclic ketone efficiently, which permits high concentration synthesis.