Debromination of dibromonaphthols
US5256829A · kind A · utility
9Cited by
1References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Oct 2, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C39/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Dibrominated naphthol compounds, e.g., 1,6-dibromo-2-hydroxynaphthalene, are regioselectively catalytically hydromonodebrominated, e.g., into 6-bromo-2-hydroxynaphthalene, by reacting such dibromonaphthols with molecular hydrogen, or a precursor compound that generates nascent hydrogen in the medium of reaction, in an acidic organic solvent and in the presence of a catalytically effective amount of a tungsten carbide-based catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.