Process for the manufacture of anthraquinone compounds
US4393007A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1980 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Jan 28, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B1/51
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the manufacture of 1,4-diamino anthraquinone or quaternized -1,4-diamino-anthraquinone; and by reacting .alpha.-nitro-anthraquinone with an amine of the formula ##STR1## to give 1-aminoanthraquinone (B), halogenating, preferably brominating, the compound (B) to give 1-amino-4-halogeno- or 1-amino-2,4-dihalogeno-anthraquinone (C), condensing the compound (C) with a diamine of the formula ##STR2## or with an amine of the formula HN--R.sub.3 R.sub.7 to give 1,4-diamino-anthraquinone (D) and optionally subsequently quaternizing the compound (D) to give a quaternized anthraquinone compound which process comprises carrying out the reaction from A to E or A to D in one single operation without isolation of the intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.