Method for producing 2,3,4,5-tetrachlorobenzotrifluoride

US6706934B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Franz-Josef Mais · Düsseldorf, DE
• Helmut Lahr · Bad Kreuznach, DE

Key dates

• Filing date: Sep 26, 2002
• Grant date: Mar 16, 2004
• Expiry date: Sep 26, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Disclosed herein is a method for producing 2,3,4,5-tetrachlorobenzotrifluoride comprising chlorinating 4-chlorobenzotrifluoride with elemental chlorine, in the presence of from 0.1 to 2% by weight of iron(III) chloride and 0.05 to 0.75% by weight of aluminum(III) chloride, in each case based on 4-chlorobenzotrifluoride, where the weight ratio of iron(III) chloride to aluminum(III) chloride is 10:1 to 1:1.