http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105348351-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 | 2015-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-105348351-B |
| titleOfInvention | The method for preparing 5ST |
| abstract | The invention discloses a kind of method for preparing 5ST, using two Hydroxyprogesterone dehydrogen substances as raw material, 5ST is obtained after passing sequentially through 11 α hydroxyls elimination reactions and 17 α hydroxyl elimination reactions.The present invention is first using two Hydroxyprogesterone dehydrogen substances as raw material, and the molar yield often walked is all more than 90%, and mole total recovery is more than 85%, weight total recovery is high with feed stock conversion between 72~76%, and accessory substance is few, product purity is high, process route is short, it is with low cost many advantages, such as.The present invention to existing 17 α hydroxyls eliminate technique improved, by reaction dissolvent of tetrahydrofuran, semicarbazide hydrochloride be eliminate reagent, using the monoacid of lower fatty acid as catalyst, improve 17 α hydroxyls elimination selectivity and yield. |
| priorityDate | 2015-11-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.