http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5919956-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f0653b87e774630cb1da426c77931a1f |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-55 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D303-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D301-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-1892 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D303-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D303-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D303-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D303-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D301-02 |
| filingDate | 1997-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1999-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2852bedb7007902d26780088a29b9ede http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ea9f5f6635b43e162f6b136e585b0efc |
| publicationDate | 1999-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-5919956-A |
| titleOfInvention | Process for the C1 -homologization of protected phorenol |
| abstract | A process for the manufacture of an optionally protected 4,8,8-trimethyl-1-oxaspiro 2.5!oct-4-en-6-ol (I) starting from protected 4-hydroxy-2,6,6-trimethyl-2-cyclohexen-1-one (II) comprises reacting the protected compound (II) with dihalomethyllithium and, if desired, cleaving off the protecting group from the thus-obtained protected 4,8,8-trimethyl-1-oxaspiro 2.5!oct-4-en-6-ol. The dihalomethyllithium can be produced in situ by reacting a dihalomethane with a lower alkyllithium in the presence of the compound of formula II. Preferably, protected (S)-4-hydroxy-2,6,6-trimethyl-2-cyclohexen-1-one is converted into protected (3S,6S)-4,8,8-trimethyl-1-oxaspiro 2.5!oct-4-en-6-ol in this manner. Both the starting material (II) and the end product (I) of the process in accordance with the invention are known, valuable intermediates for the manufacture of carotenoids. |
| priorityDate | 1996-10-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 86.