Process for making derivatives of vinylphosphonic acid or vinylpyrophosphonic acid
US4529559A · kind A · utility
2Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1984 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Jun 15, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/383
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The disclosure relates to a process for making derivatives of vinylphosphonic acid or vinylpyrophosphonic acid by reacting a ketone with phosphorus trichloride in the presence of phosphorous acid by using the ketone, phosphorous acid and phosphorus trichloride in a molar ratio of 2:1:1, 1 mol phosphorous acid being replaceable by a further mol phosphorus trichloride and 3 mols water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.