Method for the production of monohydroxy-functionalized dialkylphosphinic acids, esters, and salts using ethylene oxide, and use thereof
US8987490B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2009 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Oct 6, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5313
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for producing monohydroxy-functionalized dialkylphosphinic acids, esters, and salts, characterized in that a) a phosphinic acid source (I) is reacted with olefins (IV) in the presence of a catalyst A to obtain an alkylphosphonous acid, the salt or ester (II) thereof, b) the obtained alkylphosphonous acid, the salt or ester (II) thereof is reacted with alkylene oxides of formula (V) in the presence of a catalyst B to obtain a monofunctionalized dialkylphosphinic acid derivative (III), catalyst A represents transition metals and/or transition metal compounds and/or catalyst systems composed of a transition metal and/or a transition metal compound and at least one ligand, and catalyst B is a Lewis acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.