Selective chlorination of phenols
US4876396A · kind A · utility
4Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1987 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Jul 28, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenolic compounds and mixtures thereof, e.g., admixture of 2,4-dichlorophenol and 2,6-dichlorophenol, are selectively chlorinated at a position ortho to a hydroxyl function thereof, by reacting such phenolic compound with gaseous chlorine, in a molten reaction medium, in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.