Process for the preparation of nuclear-halogenated benzotrichlorides from the corresponding benzotrifluorides

US5672791A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Fritz Doring · Odenthal, DE
• Reinhold Gehring · Wuppertal, DE
• Josef Heinrich · Langenfeld, DE

Key dates

• Filing date: Jan 24, 1996
• Grant date: Sep 30, 1997
• Expiry date: Jan 24, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/208
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Nuclear-halogenated benzotrichlorides are prepared in a particularly advantageous manner from the corresponding nuclear-halogenated benzotrifluorides by reacting nuclear-halogenated benzotrifluorides with silicon tetrachloride in the presence of catalytic amounts of aluminium trichloride.