http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AR-006639-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_634715a790f7ef0163a61e9f364bebcd |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D205-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07B57-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D205-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B57-00 |
| filingDate | 1997-04-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1999-09-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | AR-006639-A1 |
| titleOfInvention | IMPROVED PROCEDURE FOR THE PRODUCTION OF ENANTIOMERICALLY PURE AZETIDINE-2-CARBOXYLIC ACID |
| abstract | A process for the production of enantiomerically pure azetidine-2-carboxylic acid comprising the selective crystallization of an enantiomerically pure acid salt from a homogeneous solution of azetidine-2-carboxylic acid, optically active tartaric acid, an organic acid and an aldehyde followed by the release of the free amino acid. It also refers to a process for the conversion of the enantiomer of the aforementioned acid from the form Da to form L- and vice versa by selective crystallization of a D-L-acid tartrate salt (or D-acid L-tartrate) diastereomerically pure from a homogeneous solution of D-acid respectively of L-acid) azetidine-2-carboxylic acid, tartaric acid, an organic acid and an alcohol followed by release of the free amino acid. Said organic acid can be used as a solvent; and said aldehyde can be butyric or caproic. Selective crystallization is achieved through a temperature in the range between -10 and 30 * C. |
| priorityDate | 1996-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.