| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_966a6c1f382ec9bcb5e3839dfd73e5b8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-72 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-36 |
| filingDate |
1997-10-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2003-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5aaf72884cbc20641a5b1dda86b27d7b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_08853f2cd00925dd00f7e404945523f4 |
| publicationDate |
2003-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0837062-B1 |
| titleOfInvention |
Preparation of cyclocarbonates |
| abstract |
Preparation of 4,4-disubstituted 5-methylene-1,3-dioxolan-2-one derivatives of formula (I) involves reaction of the corresponding 3,3-disubstituted prop-1-yn-3-ol of formula (II) with carbon dioxide in the presence of a quaternary ammonium salt or a phosphonium salt as catalyst. The novelty is that a silver salt is used as co-catalyst. R1,R2 = saturated or olefinic unsaturated aliphatic group or aromatic group; or R1+ R2 = (CH2)4 or (CH2)5. |
| priorityDate |
1996-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |