http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009018336-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3ba34f8b4d65e7bc691b5180c2e20c8d http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c457cf046a14c0e6538a7a527a8fa046 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D487-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-04 |
| filingDate | 2008-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_441c08abcab17debf0a0c4faf7c9c8e8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6c83d5ca16fd6c59288470be53773731 |
| publicationDate | 2009-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2009018336-A1 |
| titleOfInvention | Racemization process of R-zopiclone |
| abstract | In one of the embodiments, the present invention provides a racemization process comprising: removing the organic solvent from a mother liquor comprising R-zopiclone malate, eszopiclone malate and an organic solvent to obtain a mixture of R-zopiclone malate and eszopiclone malate; mixing the mixture with water to obtain a solution; neutralizing R-zopiclone malate and eszopiclone malate in the solution to obtain a precipitate of R-zopiclone and eszopiclone; filtering the precipitate; mixing the precipitate of R-zopiclone and eszopiclone with DBU and an organic inert solvent having a boiling point of at least 80° C.; heating; and cooling to obtain a zopiclone racemate. |
| priorityDate | 2007-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 114.