http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0648735-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_966a6c1f382ec9bcb5e3839dfd73e5b8 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C403-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-007 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C47-263 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C409-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C403-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-007 |
| filingDate | 1994-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1998-01-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50107596881cec668a9bf9200c9610b5 |
| publicationDate | 1998-01-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0648735-B1 |
| titleOfInvention | Preparation of an intermediate for vitamin A-acetate |
| abstract | A novel process for the preparation of gamma -acetoxytiglinaldehyde, which is known as an important starting material for the preparation of vitamin A acetate from a ( beta -ionylideneethyl)triphenylphosphonium halide and this aldehyde, consists in subjecting a pentenyn-3-ol of the formula HC IDENTICAL C-C(CH3)(OH)-CH=C(R)2 (II) wherein both Rs are either hydrogen or methyl to a selective ozonolysis in a lower alkanol R<1>OH wherein R<1> is C1-4-alkyl, hydrogenating the 2-hydroxy-2-methyl-3-butynal thus obtained of the formula HC IDENTICAL C-C(CH3)(OH)-CHO (III) and 1-alkoxyalkyl hydroperoxide of the formula (HOO)(R<1>)CR<2> (IV) possibly obtained as a by-product to the known 2-hydroxy-2-methyl-3-butenal of the formula H2C=CH-C(CH3)(OH)-CHO (V) catalytically and (for III) selectively, and converting this in a manner known per se to the gamma -acetoxytiglinaldehyde of the formula CH3COO-CH2CH=C(CH3)-CHO (I). The conversion of the butenal V to the aldehyde I can expediently be carried out by the known process steps acetalisation, acetylation, catalysed rearrangement and acid-catalysed hydrolysis. |
| priorityDate | 1993-10-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.