| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_246a1e484f09c05f400bcc5c9d857ddf
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a687bbcadc4014d46f53e8ea5025d894 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2650-34 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D323-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-91
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D323-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate |
2003-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b3cbbf9455b179efeb2d3989fba2dad
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e906e7678cc5ab2e1f353fd694cf838a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_310c0e208bb0576ce21a2b313f9cfbbc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9645778f3ec535ea88189bea84046a25 |
| publicationDate |
2004-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2004307561-A |
| titleOfInvention |
Method for producing cyclic lactic acid oligomer |
| abstract |
An object of the present invention is to efficiently obtain a cyclic lactic acid oligomer having a desired degree of condensation. Kind Code: A1 A compound RSSR ′ (R) is added to a terminal carboxyl group of a linear lactic acid m-mer oligomer (m is an integer of 3 to 15) at −100 ° C. to room temperature in the presence of a phosphine. And R ′ may be the same or different and are each a cyclic or linear organic group), and then cyclize the n oligomers in the presence of a catalyst. The degree of condensation of the resulting cyclic lactic acid oligomer is determined by the degree of condensation of the linear lactic acid m-mer oligomer, and is a multiple n of the m-mer. For this reason, a mixture of mnmer oligomers (ie, oligomers having mn lactic acid units) is usually obtained. [Selection diagram] None |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-6331182-B1 |
| priorityDate |
2003-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |