| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0ddb9f3656270bc5410be3679322fead |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-1804
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D9-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-18 |
| filingDate |
2007-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2438ae20e0a3cdc5468389b65bf3859e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76c16123b3822661a07d1a127dd29a48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0af80fc201bc8b7426177b31ea6e13cf
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_59b4ce292a9c150d39303860c01a9fd8 |
| publicationDate |
2009-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
KR-20090029786-A |
| titleOfInvention |
Improved Crystallization Method of Azetidinonecarboxylic Acid |
| abstract |
The present invention relates to (2R) -2-{(3S, 4S) -3-[(1R) -1- (tert-butyldimethylsilyloxy) ethyl] -2-oxoazetidin-4-yl} propionic acid It relates to a crystallization method, and is a method characterized by crystallization by mixing a solution in which the compound is dissolved with a substituted aromatic hydrocarbon solvent and / or a halogenated hydrocarbon solvent. According to the method of the present invention, the crystal of the compound can be suppressed to a low content of the 2S isomer and can be obtained with high purity and high yield. |
| priorityDate |
2006-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |