Method for producing mono-carboxy-functionalized dialkylphosphinic acids, esters and salts using a vinyl ether and the use thereof
US8987489B2 · 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 primaryC08L21/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for producing mono-carboxy-functionalized dialkylphosphinic acids, esters and salts using a vinyl ether. The method is characterized by the following steps: 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 ether of formula (V) in the presence of a catalyst B to give a mono-functionalized dialkylphosphinic acid derivative (VI) and c) reacting this derivative (VI) with an oxidant or in the presence of a catalyst C to give a mono-carboxy-functionalized dialkylphosphinic acid derivative (III), wherein the catalysts A and C are transition metals and/or transition metal compounds, and the catalyst B is a peroxide-forming compound and/or a peroxo compound and/or an azo compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.