http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0524813-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_76195fd1cd08192222699d8e7a88c231 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J31-003 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J31-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B45-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-02 |
| filingDate | 1992-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3676e2eace4ed13c07b0a670c7d92b53 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ae9851b8cce6425f6ec59b57f329b696 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9297f67b0daae550551e63fde51b4c9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7d1ede8037881be540b590b257a1012f |
| publicationDate | 1993-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0524813-A1 |
| titleOfInvention | Selective thioketalization process, process for preparing thioenol ethers from thioketals, and process for the preparation of thioketals |
| abstract | A selective thioketalization process for the preparation of a thioketal from a dione where one, but not the other, keto group of the dione is α,β-unsaturated, and where selective thioketalization occurs at the keto group of the dione which is not α,β-unsaturated, comprising the step of contacting the dione with a thiol, in the presence of a protic acid catalyst which is a complex of a Lewis acid and a protic source, wherein the temperature of the reaction medium is maintained below about 25°C during the reaction. Preferably, further, (i) the acid catalyst is employed in excess and/or (ii) the thiol is employed in excess. The inventive process may be employed, for example, in the preparation of a 3-keto,17-thioketalandrostene from the corresponding 3,17-diketoandrostene. n A process for the preparation of thioenolethers from thioketals, especially 3-keto,17-thioenoletherandrostenes from 3-keto,17-thioketalandrostenes, wherein the thioketal is contacted with a protic acid catalyst. n A process for the preparation of thioketals, especially mixed thioketals such as mixed 3-keto,17-thioketalandrostenes, from thioenolethers, comprising the step of contacting a thioenolether with a thiol in the presence of a protic acid catalyst. |
| priorityDate | 1991-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 207.