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

US6075165A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Jun 26, 1996
• Grant date: Jun 13, 2000
• Expiry date: Jun 26, 2016

Classification

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

Abstract

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