Process for the preparation of tertiary phosphine oxides
US4806691A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Sep 9, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/53
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Tertiary phosphine oxides are prepared by oxidation of tertiary phosphine sulfides using H.sub.2 O.sub.2 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.