Preparation of N-phenyl-1-naphthylamine

US6054618A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hanspeter Baumgartner · Krefeld, DE
• Lutz Frohn · Erkrath, DE
• Alexander Klausener · Neunburg vorm Wald, DE
• Frank Arndt · Krefeld, DE

Key dates

• Filing date: Dec 10, 1998
• Grant date: Apr 25, 2000
• Expiry date: Dec 10, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

N-phenyl-1-naphthylamine can be prepared by reacting aniline and 1-naphthylamine in the liquid phase at 100-400.degree. C. at a reaction pressure which is higher than atmospheric pressure. Boron and fluorine-containing catalysts, mono or polysulfonic acids, iodine, PCl.sub.3, PCl.sub.5, or POCl.sub.3, for example, may be used as catalysts.