http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109824607-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E10-549 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D239-62 |
| filingDate | 2019-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109824607-B |
| titleOfInvention | A kind of preparation method of disazo compound diazo component |
| abstract | The present invention provides a kind of preparation method of disazo compound diazonium component, it is characterized in that, comprises: step 1: with 4-nitroaniline diazotization, obtains diazonium salt; Step 2: with diazonium salt and Barbituric acid is subjected to a coupling reaction to obtain 4‑nitrophenylazobarbituric acid; step 3: 4‑nitrophenylazobarbituric acid is reduced by Na 2 S 9H 2 O to obtain 4‑amino Benzobarbituric acid. The preparation method of the invention is simple, and the obtained p-aminophenylazobarbituric acid can be used as a new diazo component for preparing disazo compounds. |
| priorityDate | 2019-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.