Process for the preparation of bifunctional tertiary aromatic phosphine sulfides

US4670601A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Jerg Kleiner · Kronberg, DE
• Erwin Weiss · Hofheim, DE

Key dates

• Filing date: Jul 18, 1985
• Grant date: Jun 2, 1987
• Expiry date: Jul 18, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5325
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Tertiary aromatic phosphine sulfides of the formula ##STR1## wherein X=F, Cl or Br, are prepared by means of a Friedel-Crafts reaction of PA0 (a) PCl.sub.3 with benzene and--after the addition of sulfur--also with fluorobenzene, chlorobenzene or bromobenzene, or PA0 (b) PSCl.sub.3 with fluorobenzene, chlorobenzene or bromobenzene and subsequently also with benzene; Friedel-Crafts catalysts are Al halides, especially AlCl.sub.3. The products are used as end products and intermediates in a variety of areas, such as, for example, the sectors of plant protection and polymers.