| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_459549086df37b5bed0003502de7e7aa |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J1-0059 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P15-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J1-0096 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J75-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J1-00 |
| filingDate |
2012-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_22d85b7ac33c713b2566b3878d7ce726
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff5429af211fcd0c14dc545b11a430bf
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf99de7d59c520f41ff57b198b84f095
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_710256ba1d4dd187fb3448fcf0bd5e8d |
| publicationDate |
2013-08-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
AU-2012219096-A1 |
| titleOfInvention |
An improved process for preparation of levonorgestrel |
| abstract |
The present invention provides an improved process for preparation of levonorgestrel (3) which comprises of hydrolysis of 13 β-ethyl-3-methoxy-17α-ethynyl-gona-2,5(10)-dien-17β- o1 (2) with an acid in aprotic solvent. The present invention also provides a novel process for purification of crude levonorgestrel (3) by recrystallization from N,N-dimethyl formamide- water; methanol-water mixture. |
| priorityDate |
2011-02-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |