Process for the manufacture of aliphatylphosphinic acid derivatives
US4933478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Sep 1, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/4816
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of aliphatylphosphinic acid derivatives, especially of alkyl dialkoxyalkylphosphinates having the formula I ##STR1## in which R is C.sub.1 -C.sub.4 -alkyl and R' is hydrogen or C.sub.1 -C.sub.4 -alkyl, comprising reacting, in the presence of an acidic catalyst, aqueous phosphonic acid with the corresponding trialkyl orthoester having the formula II: EQU (RO).sub.3 CR' II in whicih R and R' have their previous significances, the amount of the orthoester of formula II used being equal to, or in excess of the stoichiometric amount of both water and phosphinic acid present in the aqueous phosphinic acid reactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.