http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0648735-A1
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/C07C403-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-40 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C409-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C403-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C47-263 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-62 |
| filingDate | 1994-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50107596881cec668a9bf9200c9610b5 |
| publicationDate | 1995-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0648735-A1 |
| titleOfInvention | Preparation of an intermediate for vitamin A-acetate |
| abstract | A new process for the production of γ-acetoxytiglinaldehyde, which is known as an important starting material for the production of vitamin A acetate from a (β-Jonylidenäthyl) triphenylphosphonium halide and this aldehyde, consists in that a pentenin-3-ol of Formula HC≡CC (CH₃) (OH) -CH = C (R) ₂ (II), in which both R are either hydrogen or methyl, is subjected to a selective ozonolysis in a lower alkanol R¹OH, in which R¹ is C₁₋₄-alkyl , the 2-hydroxy-2-methyl-3-butinal so obtained of the formula HC≡CC (CH₃) (OH) -CHO (III) and any 1-alkoxyalkyl hydroperoxide of the formula (HOO) (R¹) CR² obtained as a by-product (IV) to the known 2-hydroxy-2-methyl-3-butenal of the formula H₂C = CH-C (CH₃) (OH) -CHO (V) catalytically and (for III) selectively hydrogenated and this in a known manner in the γ-acetoxytiglinaldehyde of the formula CH₃COO-CH₂CH = C (CH₃) -CHO (I) transferred. The conversion of the butenal V into the aldehyde I can expediently be carried out by the known process steps acetalization, acetylation, catalyzed rearrangement and acid-catalyzed hydrolysis. |
| priorityDate | 1993-10-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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