http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S56166155-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_24aca9ded2638ea793d05360dde7a4a0 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C225-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C213-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 |
| filingDate | 1980-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ee57bd7810e1f8add353a4ab46c0c612 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4bad1db0a8db25c05d77680033c1f1d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1e9db49060b2cacd0471d7d464d3b33d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c78b7e105085194815d65823bcbeac4e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ca4d0e2fd2d033e3df4beda969110b4e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_836ea3d1cc6280d4d80e480d42b3b134 |
| publicationDate | 1981-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S56166155-A |
| titleOfInvention | Preparation of anthraquinone intermediate |
| abstract | PURPOSE: To obtain an anthraquinone derivative useful as a raw material for a dye in high purity and yield, by dibrominating 1-aminoanthraquinone with sulfuric acid or fuming sulfuric acid in the presence of an organic acid, and hydrolyzing the dibrominated product in the presence of boric acid. n CONSTITUTION: 1-Aminoanthraquinone is dibrominated in ≥50wt% sulfuric acid or ≤10wt% fuming sulfuric acid in the presence of an aliphatic dicarboxylic acid or aromatic mono- or dicarboxylic acid to give 1-amino-2,4-dibromoanthraquinone. The molar amount of the carboxylic acid is 0.05W1.5mol based on the raw material compound. The reaction product is then without isolation hydrolyzed in the presence of boric acid, and if necessary the concentration of the sulfuric acid is increased to afford 1-amino-2-bromo-4-hydroxyanthraquinone. The slight formation of by-products provides a dyed clear article with a disperse dye obtained from the resultant 1-amino-2-bromo-4-hydroxyanthraquinone. n COPYRIGHT: (C)1981,JPO&Japio |
| priorityDate | 1980-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.