Process for preparing aromatic amines in the presence of palladaphosphacyclobutane catalysts

US6353136B1 · kind B1 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Holger Geissler · Mainz, DE
• Steffen Haber · Landau, DE
• Stefan Scherer · Büttelborn, DE
• Andreas Meudt · Hofheim, DE
• Frank Vollmueller · Mainz, DE

Key dates

• Filing date: Sep 8, 2000
• Grant date: Mar 5, 2002
• Expiry date: Sep 8, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D307/66
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aromatic amines of the formula (I)Ar—[NR6R7]n  (I)are prepared by reacting a haloaromatic of the formula (II)Ar—Hal  (II)with an amine of the formula (III)R6R7NH  (III)in the presence of a palladaphosphacyclobutane and a base and in the presence or absence of an ionic halide in a solvent at temperatures of from 20 to 200° C.