Coupling of phenols with diphenoquinones
US4410736A · kind A · utility
5Cited by
5References
6Claims
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Key dates
| Filing date | Apr 6, 1981 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Apr 6, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/11
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Substituted biphenols are produced by the oxidative coupling of phenolic reactants in the presence of a heterogeneous oxidative coupling catalyst and thereafter further contacting the reaction product with additional phenolic reactant in the presence of a heterogeneous reduction catalyst in the substantial absence of oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.