Process for preparing halogenated diaryl hydrogen phosphates
US4059655A · kind A · utility
9Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1975 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | Nov 24, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Halogenated diaryl hydrogen phosphates having in admixture only a minor proportion of monoaryl and triaryl phosphates are prepared by selectively hydrolyzing a corresponding triaryl phosphate or by reacting 2,6-dihalophenols having bromine or iodine atoms in the 2 and 6 positions with a phosphorous oxyhalide in the presence of an aromatic tertiary amine or carboxylic acid amide and, preferably, an inert organic solvent to form a mixture of diarylphosphorohalidate and triaryl phosphate and hydrolyzing the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.