http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111138289-A8
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-738 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-343 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-738 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-14 |
| filingDate | 2020-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111138289-A8 |
| titleOfInvention | A kind of compound and the technique of using the compound to synthesize 5-acetyl-1H-pyrazole-3-carboxylic acid |
| abstract | The invention belongs to the field of chemical synthesis of substances, and discloses a compound, an application and a process for using the compound to synthesize 5-acetyl-1H-pyrazole-3-carboxylic acid. The compound 2,3-butanedione is used as a starting material, The compound intermediate III is synthesized and precipitated from the system, which promotes the conversion of the product, and can achieve the purpose of purification through filtration, and the conversion rate reaches 95%, which improves the yield; the synthesis of intermediate IV is based on intermediate III and hydrazine. The compound is used as a raw material, the pH of the system is adjusted, the yield is increased, the production of impurities is reduced, the reaction is completed, and the concentration is filtered, the yield reaches 98%, and the HPLC purity is greater than 98.5%; through the operation, high-purity V is obtained. The process of the invention is simple and safe, has high yield, is suitable for industrialization, is favorable for impurity control, and reduces quality risks. |
| priorityDate | 2020-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.