| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_79751aeaa9923745648e5ae7d9c35782 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B1-503 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C225-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C225-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C213-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B1-503 |
| filingDate |
1986-01-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1987-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_245d415367659aac483853664a8337ae
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_371ee685f32b8a3064cb544826a21b94
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bbc47c700cc236a1b941962ad5ac3996 |
| publicationDate |
1987-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4648994-A |
| titleOfInvention |
Process for the preparation of 1-amino-2-bromo-4-hydroxyanthraquinone |
| abstract |
The invention discloses a process for the preparation of 1-amino-2-bromo-4-hydroxyanthraquinone by brominating 1-aminoanthraquinone in the 2- and 4-position in concentrated sulfuric acid and subsequently hydrolyzing the 1-amino-2,4-dibromoanthraquinone obtained as intermediate, which process comprises removing excess bromine and/or hydrobromic acid formed during the bromination from the reaction mixture and carrying out the hydrolysis at elevated temperature in the presence of an aldehyde. 1-Amino-2-bromo-4-hydroxyanthraquinone is an important intermediate for dyestuff synthesis and is used in particular for synthesizing anthraquinoid disperse dyes. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4767573-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5082957-A |
| priorityDate |
1985-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |