5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo[4.1.0]heptan-2-ones, process for their preparation and their use for preparing cyclopropanecarboxylic acids

US6498267B2 · kind B2 · utility

Assignee

• Aventis CropScience GmbH · DE

Inventors

• Jean-Pierre Demoute · Le Touquet-Paris-Plage, FR
• Gunter Homberger · Kelkheim, DE
• Sergej Pazenok · Kelkheim, DE
• Didier Babin · Ifs, FR

Key dates

• Filing date: Oct 17, 2001
• Grant date: Dec 24, 2002
• Expiry date: Oct 17, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/09
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

5-Halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo[4.1.0]heptan-2-ones, process for their preparation and their use for preparing cyclopropanecarboxylic acids Compounds of the formula (I), in which Hal is Cl, Br or I, are suitable for use as intermediates in the preparation of pyrethroids.