Process for the preparation of tertiary phosphine oxides

摘要

Tertiary phosphine oxides are prepared by oxidation of tertiary phosphine sulfides using H2O2 in a solvent comprising about 2-20% by weight of optionally halogenated lower aliphatic carboxylic acids and the remainder of mono- or polyhydric aliphatic or cycloaliphatic alcohols-if appropriate in mixtures with other inert solvents which are miscible with the carboxylic acid/alcohol mixture. Preferred solvents comprise acetic acid/methanol and acetic acid/ethanol mixtures. The reaction products are final products and intermediates products in various specialized fields such as, for example, the plant protection sector and the polymers sector.