http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114853674-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e1ca326ce8c0640119fd77b43bcc920d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-54 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-54 |
| filingDate | 2022-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_788b5fc64def8e2a3e087229b607c30e |
| publicationDate | 2022-08-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114853674-A |
| titleOfInvention | A kind of production method of pharmaceutical intermediate 1,4,5,6-tetrahydro-3-cyclopentopyrazole carbonitrile |
| abstract | The invention discloses a method for producing a pharmaceutical intermediate 1,4,5,6-tetrahydro-3-cyclopentapyrazole carbonitrile. The production method comprises the following steps: a ring-forming reaction: mixing raw material cyclopentanone and The solvent is mixed, a certain proportion of potassium ethylate, diethyl oxalate and hydrazine hydrate are added to the obtained raw material mixture, and after stirring and reacting for a period of time, the reaction product is separated, and the obtained solid is 1,4,5,6-tetrahydro- 3-Ethyl cyclopentopyrazolate; after the pharmaceutical ingredients in the reaction tank have reacted for a period of time, the reaction tank can be pressed down artificially to deform the No. 1 spring outside the reaction tank, and make the The sealing plate is separated from the reaction tank. At this time, the bottom of the reaction tank is penetrated. The intermediate product in solid state can be trapped at the bottom of the reaction tank by using the screen cloth, and the waste liquid will flow to the bottom support tank through the bottom of the reaction tank, and finally discharged from the bottom support tank. This method saves labor and simplifies the pharmaceutical steps. |
| priorityDate | 2022-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.