Chlorination and bromination of aromatic compounds at atmospheric pressure
US6118018A · kind A · utility
27Cited by
1References
20Claims
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Key dates
| Filing date | Dec 6, 1999 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Dec 6, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/307
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method of adding 1 to 4 chlorine or bromine atoms to an aromatic ring of compound that has at least one electron-withdrawing groups on that ring. The aromatic compound is reacted with a chlorinating agent or a brominating agent in the presence of about 0.1 to about 10 mole % of a Lewis acid catalyst and about 0.001 to about 0.1 equivalents of an iodine-containing cocatalyst at a temperature of ambient to about 100.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.