Selective ortho-chlorination of phenols
US5149858A · kind A · utility
7Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1988 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Jul 18, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenolic compounds, notably admixtures of 2,4-dichlorophenol and 2,6-dichlorophenol, are selectively chlorinated at the ortho positions thereof, with gaseous chlorine and in a molten medium, in the presence of a selectivity-enhancing effective amount of an organic cation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.