http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103553997-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-273 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-273 |
| filingDate | 2013-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2015-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103553997-B |
| titleOfInvention | The preparation method of a kind of (S)-Oxiracetam crystal form III |
| abstract | A preparation method of (S)-Olaxiracetam crystal form II I, is dissolved in n-propyl alcohol solvent by (S)-oxiracetam with 5mg/mL-50mg/mL, constantly stirs, 40 DEG C ~ 80 DEG C heating for dissolving, filters, and forms supersaturated solution; The supersaturated solution obtained sealing is placed on crystallisation by cooling in the low temperature environment of-17 DEG C ~-21 DEG C, and obtaining colourless bulk crystals, is (S)-oxiracetam new crystal III.(S)-oxiracetam new crystal III purity that preparation method of the present invention adopts raw material cheap and easy to get, obtained is high, and preparation method's mild condition is easy and simple to handle, introducing impurity is few, favorable reproducibility, and production process is easy to control, security is high, is applicable to suitability for industrialized production. |
| priorityDate | 2013-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.