Ciba Specialty Chemicals Corporation

Basf Se Corporation

Eth Zurich

University of Bristol

Bayer Chemicals Ag

Igm Group B.v.

Hansjörg Grützmacher

Daniel Stein

Jean-Pierre Wolf

Kurt Dietliker

Peter Murer

Stephan Burkhardt

Souâd Boulmaâz

Jens Geier

Markus Scherer

Hartmut Schönberg

Peter Deglmann

Paul Gerard Pringle

Timo Ott

Rebekka Von Benten

Reinhard Sommerlade

Alexander König

Andrea Eisenhardt

Roland Helmut Krämer

Frank Reuter

Sindhu Menon

Mark Bispinghoff

Elisabetta Piras

Aaron Tondreau

Georgina Müller

Georgina MÜLLER

A versatile, highly efficient process for the preparation of acylphosphines such as mono- and bisacylphosphines via reaction of phosphines (PHand higher homologues) or silylated phosphines with acylhalides in the presence of at least one lewis acid. Further a novel acyl phosphines obtainable by the process.

Versatile process for the preparation of acylphosphines

The invention relates to flame retardant compositions comprising heptaphosphorus-derived compounds and to novel heptaphosphorus-derived compounds. These heptaphosphorus-derived compounds are especially useful for the manufacture of flame retardant compositions based on thermoplastic polymers, especially polyolefin homo- and copolymers, polycondensates, such as polyamides, or polyesters and duroplastic polymers, such as the ones based on polyepoxides.

Heptaphosphorus-derived compounds as flame retardants

Bisacylphosphine oxide or bisacylphosphine sulfide compounds of formula (I) or (II) wherein

Derivatives of bisacylphosphinic acid, their preparation and use as photoinitiators

The invention relates to a process for the preparation of (bis)acylphosphanes of formula I, wherein n and m are each independently of the other 1 or 2; R1 if n=1, is e.g. unsubstituted or substituted C-Calkyl or C-Calkenyl, or phenyl, R1 if n=2, is e.g. a divalent radical of the monovalent radical defined above; R2 is e.g. C-Calkyl, C-Ccycloalkyl, C-Calkenyl, mesityl, phenyl, naphthyl; R3 is one of the radicals defined under R; the process comprises the steps a) contacting e.g. elemental phosphorous [P]&#x221e;, P(Hal)with a reducing metal optionally in the presence of a catalyst or an activator in a solvent to obtain metal phosphides MeP or Me'P, wherein Me is an alkali metal and Me&#x2032; is an earth alkali metal or to obtain metal polyphosphides b) optionally adding a proton source, optionally in the presence of a catalyst or an activator to obtain metal dihydrogen phosphides MePH; c) subsequent acylation reaction with m acid halides of formula III or m carboxylic acid esters of formula IV or, in case that in formula I m=1, with one carboxylic ester of formula IV followed by one acid halide of formula III or vice versa, wherein R is the residue of an alcohol and Ris as defined above; d) alkylation reaction subsequent reaction with an electrophilic agent RHal or other electrophilic agents to obtain the compounds of formula I. An oxidation step may follow to obtain mono- and bisacylphosphane oxides or mono- and bisacylphosphane sulfides, which are used as photoinitiators. 

Process for preparing acylphosphanes and derivatives thereof

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. 

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

The present invention relates to a process for preparing phosphorus compounds and intermediates.

Preparation of phosphorus compounds

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Dielsdorf, Switzerland

Hansjörg Grützmacher