http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-624486-A
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/C07C403-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C403-10 |
| filingDate | 1947-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1949-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-624486-A |
| titleOfInvention | A process for the manufacture of pentaenes |
| abstract | Pentaenes of the formula <FORM:0624486/IV (b)/1> are obtained by condensing 4-(21, 61, 61 -trimethyl-cyclohexene-(11)-yl)-2-methyl-butene-(2)-al-(1) with a Grignard compound of 1-hydroxy-3-methyl-pentene-(2)-yne-(4) or a lower alkyl ether thereof and then in optional sequence partially hydrogenating, by the action of 1 mol. of hydrogen and, in order to effect allyl rearrangement and to introduce a further double bond by dehydration, reacting with a compound from which iodine is easily split off, e.g. phosphorus di-iodide, hydrogen iodide and iodine halide, the 1-hydroxy-3,7-dimethyl-6-hydroxy-9-(21, 61, 61-trimethyl-cyclohexene-(11)-yl)-nonadiene-(2,7) -yne-(4) or lower alkyl ether thereof obtained. The rearrangement and dehydration step is advantageously carried out in an inert diluent of boiling between 80 DEG and 140 DEG C., e.g. petroleum ether. The hydrogenation may be effected in the presence of a palladium-charcoal catalyst. During the synthesis antioxidants such as tocopherols may be added. Detailed examples are given. Specification 605,208 is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1005956-B |
| priorityDate | 1947-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.