http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107698644-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J7-002 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J7-00 |
| filingDate | 2017-06-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107698644-B |
| titleOfInvention | Process for preparing methyltetraenes |
| abstract | The invention discloses a method for preparing methyltetraene (5 ST), which is used for preparing an important intermediate methyltetraene of dexamethasone, a compound 1 (olefine acid) is taken as a raw material, a compound 2 is obtained by decarboxylation, a compound 3 is obtained by elimination, and finally, a final product methyltetraene is obtained by dehydrogenation; the reaction formula is as follows: the invention takes compound 1 (olefine acid) as raw material, and obtains target product through three steps of decarboxylation, elimination and dehydrogenation, wherein the weight yield of methyltetraene is 55%, the purity of the product is more than 98%, and the invention has strong cost competitiveness. Meanwhile, the method is mild in reaction, green, environment-friendly, low in cost, easy to amplify and suitable for industrial production. |
| priorityDate | 2017-06-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 57.