Preparation of biphenols by oxidative coupling of alkylphenols using a recyclable copper catalyst
US6689921B2 · kind B2 · utility
1Cited by
21References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Aug 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for producing biphenols by oxidative coupling of dialkylphenols which proceeds in two stages using a copper amine complex which is catalytically effective in each stage is disclosed. A novel copper amine complex is also disclosed wherein the complex exhibits high catalytic activity for the oxidative coupling of substituted phenols under mild conditions, has dual (two stage) activity and can be readily recycled and reused.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.