Process for preparing nucleus-halogenated benzoyl chlorides

US5840975A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Reinhold Gehring · Wuppertal, DE
• Herbert Muller · Bischofswerda, DE
• Georg Hardenbicker · Wipperfürth, DE
• Werner Bussmann · Leverkusen, DE

Key dates

• Filing date: Jul 24, 1997
• Grant date: Nov 24, 1998
• Expiry date: Jul 24, 2017

Classification

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

Abstract

Ring-halogenated benzoyl chlorides are obtained in a particularly advantageous manner if ring-halogenated benzotrichlorides are reacted with formic acid in the presence of iron salts.