Selective chlorination of ortho-substituted phenols
US4954662A · kind A · utility
1Cited by
6References
18Claims
0Family size
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Inventors
Key dates
| Filing date | Jul 18, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Jul 18, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ortho-substituted phenolic compounds, e.g., 2,6-dichlorophenol, are selectively chlorinated, e.g., into 2,4,6-trichlorophenol, with gaseous chlorine in either the molten state or in a solvent 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.