Process for the reductive removal of halogen atoms from anthraquinones
US4261909A · kind A · utility
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7Claims
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Key dates
| Filing date | Apr 26, 1979 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Apr 26, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C46/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the reductive removal of halogen atoms from amino-, acylamino- or hydroxyanthraquinones, said halogen atoms being bonded in the .alpha.-position and/or ortho-position to amino, acylamino or hydroxyl groups, which comprises carrying out the reductive removal in basic medium with hydrazine or hydrazine derivatives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.