Oxidation of phenyl phosphonous dihalide
US4252740A · kind A · utility
2Cited by
10References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1978 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Sep 29, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenyl phosphonous dihalide is oxidized according to the following reaction: ##STR1## wherein X is Cl or Br. The reaction is conducted at a temperature from about 0.degree. C. to about 200.degree. C. Charcoal is added to the reaction mixture when impure phenyl phosphonous dihalide is used as a starting material. The product has high purity and is stable at high temperatures. It can be used as an intermediate to prepare flame retardants, insecticides, pesticides and plasticisers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.