Synthesis of 1-aminoanthraquinone
US5132437A · kind A · utility
2Cited by
8References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1991 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Feb 12, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1-Aminoanthraquinone (1-AAQ) is synthesized by the reaction of 2-chlorobenzyl chloride and xylene in the presence of a solid acid catalyst to yield 2-chloro dimethyldiphenylmethane, subsequent oxidation of the methyl groups, ring closure to form a 1-chloroanthraquinone carboxylic acid, replacement of the 1-chloro group with ammonia, and decarboxylation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.