Preparation of quinonediimines from phenylenediamines using oxygen and a metal or metal salt catalyst
US6025508A · kind A · utility
1Cited by
3References
37Claims
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Key dates
| Filing date | May 28, 1999 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C249/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A phenylenediamine compound can be converted, with high selectivity, into its corresponding quinonediimine by reacting the phenylenediamine with oxygen and a metal catalyst or a salt thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.