http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2165430-C2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b8be6a6c990669567cc455d32b00535e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J41-0094 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J75-005 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J21-006 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J75-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J41-00 |
| filingDate | 1996-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2001-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7318186e8259afa93675cc3a8236bb23 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_43fac3efbe7bcf8f6840f2ce02f4ad9f |
| publicationDate | 2001-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2165430-C2 |
| titleOfInvention | Method of preparing steroid derivative ketale, and methods for preparation of compounds |
| abstract | FIELD: synthesis of biologically-active compounds. SUBSTANCE: invention provides method for preparing intermediates in synthesis of steroids with progestogenic activity, in particular ketal of steroid derivative with general formula I: (I), wherein R 1 expresses methyl or ethyl, R 2 hydroxyl, R 3 hydrogen, methyl or cyanomethyl, or R 2 and R 3 form together oxygen bridge; and R 4 expresses C2-C5-alkylene, consisting in that compound of the general formula II: (II), in which all symbols are the same as in formula I, is treated in presence of one or two ortho- ethers having formula III: (III) and IV: (IV), in which all symbols are the same as in formula I, by alcohol of general formula HOR 4 OH, wherein R 4 is indicated above. EFFECT: enabled preparation of products with minimum amounts of impurities. 6 cl, 7 ex |
| priorityDate | 1995-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 75.