Process for the preparation of p-haloalkoxyanilines

US5900509A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Franz-Josef Mais · Düsseldorf, DE
• Albrecht Marhold · Leverkusen, DE
• Guido Steffan · Odenthal, DE

Key dates

• Filing date: Jan 16, 1998
• Grant date: May 4, 1999
• Expiry date: Jan 16, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C213/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

p-Haloalkoxyanilines are obtained from the corresponding nitrobenzenes by catalytic hydroxylation in the presence of an aqueous acidic reaction medium with the formation of a corresponding aminophenol and reaction of this aminophenol with a halogenated olefin in the presence of water and a catalytic amount of base.