Method of producing a cyclohexenone oxime ether lithium salt, products which can be obtained using this method, the use thereof and corresponding plant protection agents

US6989453B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Volker Maywald · Ludwigshafen, DE
• Reiner Kober · Neheim, DE
• Frank Heimann · Ludwigshafen, DE
• Klaus Oberdorf · Heidelberg, DE
• Albrecht Harreus · Ludwigshafen, DE
• Norbert Gotz · Worms, DE
• Marcus Vossen · Mannheim, DE

Key dates

• Filing date: Sep 12, 2001
• Grant date: Jan 24, 2006
• Expiry date: Jan 15, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D335/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

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.