Hydroxylation of phenolic compounds
US5414153A · kind A · utility
15Cited by
2References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Apr 5, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenolic compounds, e.g., the phenols and phenol ethers, are selectively hydroxylated whereby the amounts of the final product para isomer are enhanced, for example in favor of hydroquinone versus pyrocatechol in the event of the hydroxylation of phenol, by reacting such phenolic compounds with hydrogen peroxide, advantageously in a polar, aprotic, organic solvent reaction medium, in the presence of a catalytically effective amount of a sulfonated polymer and a cocatalytically effective amount of an aromatic ketone compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.