Ciba Specialty Chemicals Corporation

Markus Scherer

Hansjörg Grützmacher

Souâd Boulmaâz

Daniel Stein

Hartmut Schönberg

Jens Geier

Jean-Pierre Wolf

Peter Murer

Stephan Burkhardt

Reinhard Sommerlade

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; R, if n=1, is e.g. phenyl R, if n=2, is e.g. C-Calkylene or phenylene; Ris e. g. C-Calkyl, phenyl or substituted phenyl; Ris e. g. C-Calkyl, 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. 

Process for preparing acylphosphanes and derivatives thereof

The invention relates to a process for the preparation of cycloorganylphosphanes of formula 1 (RP)by reaction of dihalo(organyl)phosphanes of formula RPHalwith: a) activated zinc in an organic solvent, or with: b) an alkali metal or alkaline earth metal in a non-polar organic solvent in the presence of an activator, wherein Ris C&#x2013;Calkyl; C&#x2013;Ccycloalkyl, aryl or heteroaryl, Hal is F, Cl, Br or I, and n is a number from 3 to 20. The invention relates also to novel di(alkali metal/alkaline earth metal) oligophosphanediides and to the use thereof in the preparation of organophosphorus compounds.

Process for the synthesis of cycloorganylphosphanes and di(alkyli metal/alkaline earth metal) oligophosphanediides

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Beromünster, Switzerland

Markus Scherer