Process for the preparation of bifunctional tertiary...

Details Process for the preparation of bifunctional tertiary... Process for the preparation of bifunctional tertiary...

C - Chemistry, Metallurgy

07

F

260/613.5

C07F 9/53 (2006.01)

Patent

CA 1247647

Abstract of the disclosure Tertiary aromatic phosphine oxides of the formula Image in which X = F, Cl or Br, are prepared by Friedel-Crafts reaction of a) phenylthiophosphonic dichloride with fluoro-, chloro- or bromobenzene, or b) of dichlorophenylphosphine, sulfur and fluoro-, chloro- or bromobenzene, and c) subsequent conversion of the phosphine sulfides pro- duced by a) or b) using H2O2 in a solvent which com- prises at least about 2% by weight, preferably at least about 10% by weight, of optionally halogena- ted lower aliphatic carboxylic acids and/or their an- hydrides and, if appropriate, of other inert solvents which are miscible therewith. The reaction products are final products and intermedi- ates in various specialized fields, such as, for example, in the plant protection sector and the polymers sector.

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