Process for the preparation of sulfonated arylphosphines

US5451698A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmut Bahrmann · Hamminkeln, DE
• Peter Lappe · Dinslaken, DE
• Wolfgang Anton Herrmann · Freising, DE
• Rainer Manetsberger · Wielenbach, DE
• Guido Albanese · Hersbruck, DE
• Klaus Bergrath · Oberhausen, DE

Key dates

• Filing date: Jun 23, 1994
• Grant date: Sep 19, 1995
• Expiry date: Jun 23, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5054
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The sulfonation of arylphosphines, i.e. mono-, di-, oligo- and polyphosphines, which contain at least one aromatic radical capable of being sulfonated, is carried out in the presence of a Lewis acid at 0.degree. to 80.degree. C. The process avoids side-reactions, in particular the formation of phosphine oxides. In treating the sulfonation mixture, the Lewis acid can be removed together with the sulfuric acid.