Production of halogenomethylphosphinic acid halides
US4224241A · kind A · utility
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2References
3Claims
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Assignee
Inventor
Key dates
| Filing date | May 21, 1979 |
| Grant date | Sep 23, 1980 |
| Priority date | — |
| Expiry date | May 21, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for making halogenomethylphosphinic acid halides of the general formula: EQU XCH.sub.2 (R)P(O)X in which R stands for an alkyl, halogenoalkyl, aralkyl, halogenoaralkyl, aryl or halogenoaryl group with up to 18 carbon atoms and X stands for a halogen atom. The compounds are made by reacting an organyldihalogenophosphane of the general formula: ##STR1## in which R and X have the meanings given above, with trioxane in the presence of a Lewis acid or protonic acid as a catalyst, the reaction being effected at temperatures of 80.degree. to 250.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.