| Title of Invention |
A PROCESS FOR THE PREPARATION OF ACYLPHOSPHINES |
| Abstract |
A process for the preparation of acylphosphines of formula (I) wherein m is 1 or 2; R<sub>1</sub>, R<sub>2</sub>, and R<sub>3</sub> are organic residues derived from aliphatic or aromatic hydrocarbons; by (1) reacting organic phosphorus halides of formula (II) wherein Y is Br or Cl,with an alkali metal in a solvent in the presence of an activator, wherein the alkali metal is present in the form of a dispersion of alkali metal particles having a mean particle size of ≤ 500 µm in the solvent, (2) subsequent reaction with acid halides of formula (III) which process is carried out without isolation of the intermediates. Preferably, R1, R2 and R3 are independently from each other phenyl, naphthyl and bi-phenyl, being unsubstituted or substituted by one to five halogen, C1-C8 alky and/or C1-C8 alkoxy. Most preferably, R1 and R3 are phenyl and R2 is 2,4,6-trimethylphenyl. The alkali metal is preferably sodium, the activator is preferably chlorobenzene and/or n-butanol. |
Documents:
387-CHENP-2006 ABSTRACT.pdf
387-CHENP-2006 CLAIMS.pdf
387-CHENP-2006 CORRESPONDENCE OTHERS.pdf
387-CHENP-2006 CORRESPONDENCE PO.pdf
387-CHENP-2006 DESCRIPTION (COMPLETE).pdf
387-CHENP-2006 FORM-1.pdf
387-CHENP-2006 FORM-18.pdf
387-CHENP-2006 FORM-3.pdf
387-CHENP-2006 FORM-5.pdf
387-CHENP-2006 PCT.pdf
387-CHENP-2006 PETITIONS.pdf
387-CHENP-2006 POWER OF ATTORNEY.pdf
387-chenp-2006.tif
387.jpg
abs-387.jpg