http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5663999-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07J9-00 |
| filingDate | 1979-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c25440c1c5dd4b2cc880a922187f5f52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6576e2785f80ae0855620bb32a298632 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e4d21366bb786f5d87e4d17295c2a5dd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aef09cd6facbd064b64927cfd1025971 |
| publicationDate | 1981-05-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5663999-A |
| titleOfInvention | Separation of hydroxycholesta-5,7-dienes |
| abstract | PURPOSE: To separate the titled compound useful as an intermedate of a remedy for osteomalacia, etc., economically, in an industrial scale, by recrystallizing a mixture of hydroxycholesta-5,7-diene and hydroxycholesta-4,6-diene in a specific mixed solvent. n CONSTITUTION: A mixture of hydroxycholesta-5,7-dienes of formula I (R 1 and R 2 are independently pivaloyl or ethoxycarbonyl; R 3 and R 4 are independently H, pivaloyloxy, or ethoxycarbonyl, provided that R 3 and R 4 are not H at the same time) and hydroxycholesta-4,6-dienes of formula II, is recrystallized with a mixed solvent consisting of a lower aliphatic alcohol (e.g. methanol) and a lower aliphatic ether (e.g. diethyl ether) to obtain the crystal of the objective compound exclusively. n COPYRIGHT: (C)1981,JPO&Japio |
| priorityDate | 1979-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.