http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DD-144548-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5f2c548ed7f58bd8412f164b4e0a1dcb http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ea2e1d5ee70989ddb542b69ded7cf5d1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a71de2537b8dab47832e0addb4fd8f18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6da054aa64642c2eba10952c44a085f2 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J7-00 |
| filingDate | 1979-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7a4594dbb8f25ad5e4fe05aa8de712f4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_71d6383e85813bfafda439dd1b672c30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7ccdf43636d375bdd34734a66dcdc266 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c8305dcbd536d10b80a27db0eae5af64 |
| publicationDate | 1980-10-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DD-144548-A1 |
| titleOfInvention | PROCESS FOR PREPARATION OF PREGNA-1,4-DIEN-3,20-DION |
| abstract | The invention relates to a process for the preparation of pregna-1,4-diene-3,2β-dione, which can serve as a starting material for the synthesis of cortocoids. The object of the invention is "the economical conversion of bis-nor-chola-1, 4" dien-3-one-22-acid, which is accessible from various sterols by microbial side chain degradation, to said title compound -chola. ™, 4-dien-3-one-22-acid is converted into its acid halide, this with an excess of an ionic azide to the 20-AzidocarbcnyIaminc-pregna-l, 4-dian-3-one, this is converted into the 20-imino-pregna-diene-3-one by treatment with an aqueous ionic hydroxide, from which the N, N-dihalogen derivative is obtained by means of a positive halogen-containing compound, this is mixed with a strong base to 20 "(N). Haloimino) -pregna-1,4'-dien-3-one is dehydro-halogenated and the latter hydrolyzed in the presence of a reducing agent with a strong acid to the title compound. - formulas |
| priorityDate | 1979-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 72.