http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108840820-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-73 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-73 |
| filingDate | 2018-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-04-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-04-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108840820-B |
| titleOfInvention | Method for synthesizing 4-aminopyridine in one step |
| abstract | The invention discloses a method for synthesizing aminopyridine and 4-aminopyridine in one step, belonging to the technical field of chemical raw material synthesis. Under the condition of low temperature, cyanopyridine is used as a raw material, sodium tungstate is used as a catalyst (the addition amount of the catalyst is about 2-5% of the mass of the cyanopyridine), the raw material is pre-reacted in a sodium hypochlorite aqueous solution to enable the reaction to stay on formamide pyridine, then the temperature is raised to carry out Hofmann one-step reaction to obtain aminopyridine, and by taking the synthesis example of 4-aminopyridine, the reaction condition is easy to control, the reaction steps are simple, the product separation is convenient, the side reaction is less, the product purity can reach 99.95%, and the problems of serious pollution, low yield and the like in the prior art are solved. |
| priorityDate | 2018-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.