http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112441978-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-20 |
| filingDate | 2019-08-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112441978-B |
| titleOfInvention | Preparation method of 1-methyl-5-hydroxypyrazole-4-carboxylic acid ethyl ester |
| abstract | The invention relates to a preparation method of 1-methyl-5-hydroxypyrazole-4-carboxylic acid ethyl ester. DEMME is taken as a raw material or a mixture of DEMME and EMME is taken as a raw material, and after amination reaction and cyclization reaction, 1-methyl-5-hydroxypyrazole-4-ethyl carboxylate is prepared. According to the invention, DEMM is used as a raw material or a mixture of DEMM and EMME is used as a raw material, the raw material is easy to obtain, the conversion rate of an intermediate DEMM is not required to be pursued, high-purity EMME is not required to be obtained, the reaction time is shortened, the production cost is reduced, and meanwhile, the yield of the preparation method is more than 90%, the product purity is more than 96%, the product yield is high, the purity is high, and the preparation method is suitable for industrial production. |
| priorityDate | 2019-08-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.