Method for producing mono-hydroxy-functionalized dialkylphosphinic acids, esters and salts using a vinyl ester of a carobxylic acid and the use thereof
US9068119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2009 |
| Grant date | Jun 30, 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 mono-hydroxy-functionalized dialkylphosphinic acids, esters and salts. The method is includes: a) reacting a phosphinic acid source (I) with olefins (IV) in the presence of a catalyst A to give an alkylphosphonous acid, the salt or the ester (II) thereof, b) reacting the alkylphosphonous acid so obtained, the salt or the ester (II) thereof with a vinyl ester of a carboxylic acid of formula (V) in the presence of a catalyst B to give a mono-functionalized dialkylphosphinic acid derivative (VI) and c) reacting the mono-functionalized dialkylphosphinic acid derivative (VI) so obtained in the presence of a catalyst C to give a mono-hydroxy-functionalized dialkylphosphinic acid derivative (III), the catalyst A is a transition metal, a transition metal compound or a catalyst system including a transition metal, or a transition metal compound and at least one ligand, and the catalyst B is a peroxide-forming compound and/or a peroxo compound or an azo compound, and the catalyst C is an acid or a base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.