http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5793998-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d5d04736b0b882a4f5a1e0e0e4cd8cbb |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J75-00 |
| filingDate | 1980-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_455bb77e45f359c7babf61f3be8a90a4 |
| publicationDate | 1982-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5793998-A |
| titleOfInvention | Preparation of delta11 unsaturated steroid |
| abstract | PURPOSE: To prepare the titled compound useful as an intermediate of a gallstone-dissolving agent, at a low cost, by the desulfonation reaction of a steroid compound containing an alkylsulfonyl group in the presence of a phase-transfer catalyst such as a specific metal salt, a quaternary ammonium salt, etc. n CONSTITUTION: The objective steroid compound can be prepared by the desulfonation reaction of a steroid compound having an alkylsulfonyl group at 12- position in the presence of a phase-transfer catalyst consisting of (A) one or more compounds selected from halides and (haogeno) lower carboxylic acid salts of alkali or alkaline earth metals, (B) one or more compounds selected from carbonates, bicarbonates, monohydrogenphosphates, sulfites, hydroxides and amide salts of alkali or alkaline earth metals, and (C) one or more compounds selected from quaternary ammonium salts, quaternary phosphonium salts and crown ethers, pref. in a solvent at 110W130°C for 4W18hr. The amounts of the catalyst components (A), (B) and (C) are pref. 2W0.5pts., 0.5W0.05pt., and 0.1W0.01pt. per 1pt. of the starting steroid compound, respectively. n COPYRIGHT: (C)1982,JPO&Japio |
| priorityDate | 1980-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.