http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103923028-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D257-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D257-04 |
| filingDate | 2014-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-05-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-05-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103923028-B |
| titleOfInvention | Preparation method of valsartan methyl ester |
| abstract | The invention provides a preparation method of valsartan. The preparation method has the technical effects that amide methyl ester and sodium azide are used as raw materials and are catalyzed by amine salt to carry out tetrazole formation reaction; side effects are minimized by controlling the reaction course; main products are furthest generated; unreacted raw materials are recycled and reused; the yield in the preparation method is increased by more than 10% relative to the yields in existing processes; compared with the existing processes, the method has the effect that plenty of high-toxicity wastewater is no longer generated, and is easy to be widely popularized industrially. |
| priorityDate | 2014-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.