Process for preparation of 2-substituted 1,4-naphthoquinone
US5329026A · kind A · utility
2Cited by
3References
13Claims
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Assignee
Inventors
Key dates
| Filing date | Nov 28, 1990 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Nov 28, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparation of a 2-substituted-1,4-naphthoquinone which comprises oxidizing a 2-substituted naphthalene to obtain reaction products comprising a 2-substituted-1,4-naphthoquinone and a 6-substituted-1,4-naphthoquinone; adding a diene compound to the reaction products and heating the mixture to form a Diels-Alder reaction adduct between the diene compound and the 6-substituted-1,4-naphthoquinone in the reaction products; and separating the 2-substituted-1,4-naphthoquinone from the adduct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.