Process for preparing acylphosphanes and derivatives thereof

US7439401B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Reinhard Sommerlade · Glückstadt, DE
• Souad Boulmaaz · Birsfelden, CH
• Jean-Pierre Wolf · Maisprach, CH
• Jens Geier · Hayingen, DE
• Hansjörg Grützmacher · Dielsdorf, CH
• Markus Scherer · Lebach, DE
• Hartmut Schonberg · Adliswil, CH
• Daniel Stein · Rochester, US
• Peter Murer · Oberwil, CH
• Stephan Burkhardt · Gelterkinden, CH

Key dates

• Filing date: Jul 9, 2004
• Grant date: Oct 21, 2008
• Expiry date: Sep 26, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5337
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a new, selective process for the preparation of mono- and bisacylphosphanes of formula (I) n and m are each independently of the other 1 or 2; R1, if n=1, is e.g. phenyl R1, if n=2, is e.g. C1-C18alkylene or phenylene; R2 is e. g. C1-C18alkyl, phenyl or substituted phenyl; R3 is e. g. C1-C18alkyl, by (1) reacting a phosphorous halide of formula IIa or a phosphorous halide oxide of formula (IIb) or a phosphorous halide sulfide of formula (IIc) with an alkali metal in a solvent in the presence of a proton source; (2) subsequent reaction with m acid halides of formula (III) An oxidation step may follow to obtain mono- and bisacylphosphane oxides or mono- and bisacylphosphane sulfides.