| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_966a6c1f382ec9bcb5e3839dfd73e5b8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J53-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J13-007
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J13-005
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J9-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J31-006 |
| 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/C07J11-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J53-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J31-00 |
| filingDate |
1989-06-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_872ac9b7b5fe6bd82e6953074c26927e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2a8dd6f9cb01ccc51cabd79ec34db4f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b91a2cc2266dc31c31952e263898e48e |
| publicationDate |
1990-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H0228194-A |
| titleOfInvention |
Pregnane derivative |
| abstract |
The present disclosure is directed to a process and intermediates for the synthesis of Vitamin D3 metabolites such as 1,25-dihydroxycholecalciferol, 25-hydroxycholecalciferol and 24R,25-dihydroxycholecalciferol from 17-keto steroids via intermediates having the natural steroid configuration at the 20-position. These novel intermediates are prepared from 17-keto steroids by reaction with ethyltriphenylphosphonium halides followed by reaction with formaldehyde to form comounds having the natural steroid configuration at the 20-position and which are suitable substrates for the preparation of the aforementioned Vitamin D3 metabolites. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102511369-A |
| priorityDate |
1980-10-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |