Process for preparing 4-hydroxyanilines

US6124504A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Achim Hupperts · Düsseldorf, DE
• Karl Steinbeck · Leawood, US
• Uwe Stelzer · Burscheid, DE
• Reinhard Lantzsch · Leverkusen, DE
• Hermann Seifert · Bensberg, DE

Key dates

• Filing date: Jun 27, 1997
• Grant date: Sep 26, 2000
• Expiry date: Jun 27, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C309/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The application describes a process for preparing 4-hydroxyanilines by the reaction of phenols with diazonium salts and subsequent reduction.