| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_07c9542186133097bd6bbb7d92393090 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2602-24 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07J9-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C401-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C401-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J9-00 |
| filingDate |
1981-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1982-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2089810-A |
| titleOfInvention |
23, 25-Dihydroxyvitamin D3 precursors |
| abstract |
The invention comprises compounds of formula <IMAGE> where R1, R2 & R3 are hydrogen, acyl or alkylsilyl. It may be obtained by reacting a compound of formula <IMAGE> with a methyl-Grignard or methyl lithium reagent. When subjected to actice radiation the compound of the invention is converted to a compound of formula <IMAGE> which, on heating in a solvent at 25 DEG to 100 DEG C, is converted to the vitamin D3 derivative of formula <IMAGE> |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6759400-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6486145-B2 |
| priorityDate |
1980-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |