Process for the preparation of polyhalogenated benzotrifluorides, benzotrichlorides and benzoyl chlorides and new trihalogenobenzotrichlorides and -benzoyl chlorides

US5599980A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Albrecht Marhold · Leverkusen, DE
• Peter Andres · Ginsheim-Gustavsburg, DE

Key dates

• Filing date: Jan 12, 1994
• Grant date: Feb 4, 1997
• Expiry date: Jan 12, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/58
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Polyhalogenated benzotrifluorides can be reacted with chlorides from the series of Friedel-Crafts catalysts to give the corresponding benzotrichlorides, which can be hydrolysed by water in the presence of iron(III) chloride to give the corresponding benzoyl chlorides. These are suitable as intermediate products for the preparation of active compounds for medicaments and feed additives.