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. 24, 2006
Filed:
Sep. 12, 2001
Volker Maywald, Ludwigshafen, DE;
Reiner Kober, Fussgönheim, DE;
Frank Heimann, Ludwigshafen, DE;
Klaus Oberdorf, Heidelberg, DE;
Albrecht Harreus, Ludwigshafen, DE;
Norbert Götz, Worms, DE;
Marcus Vossen, Kassel, DE;
Volker Maywald, Ludwigshafen, DE;
Reiner Kober, Fussgönheim, DE;
Frank Heimann, Ludwigshafen, DE;
Klaus Oberdorf, Heidelberg, DE;
Albrecht Harreus, Ludwigshafen, DE;
Norbert Götz, Worms, DE;
Marcus Vossen, Kassel, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing 2-{1-[2-(4-chlorophenoxy)propoxyimino]-butyl}-3-hydroxy-5-(tetrahydrothiopyran-3-yl)cyclohex-2-enone lithium salt by reacting the corresponding acid 2-{1-[2-(4-chlorophenoxy)-propoxyimino]butyl}-3-hydroxy-5-(tetrahydrothiopyran-3-yl)-cyclohex-2-enone and lithium hydroxide and the isolation of the lithium salt are described. Here, it is advantageous to use a solvent mixture which comprises methanol and at least one aromatic hydrocarbon and to remove at least some of the solvent prior to the isolation. It is particularly preferred to dissolve the acid in an aromatic hydrocarbon, preferably toluene, and to use a methanolic lithium hydroxide solution. The product, which can be obtained in a more efficient manner by this process, furthermore has considerable advantages with respect to formulation.