Oxidation products of paramethyl-substituted hindered phenols
US4915875A · kind A · utility
8Cited by
3References
24Claims
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Key dates
| Filing date | Nov 4, 1986 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Nov 4, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/055
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Paramethyl-substituted hindered phenols are selectively oxidized by contacting with an oxidizing agent at elevated temperatures in the presence of a heterogeneous oxidative coupling catalyst. In the absence of an optional nucleophile the products comprise carbon-carbon oxidative coupling products. In the presence of a nucleophile, addition products result that may be further oxidized by continued exposure to the oxidizing agent to yield substituted p-hydroxybenzaldehydes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.