http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-741047-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2fa8f8941ecc2d9521285617dbb93322 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-587 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-203 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-455 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-65 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-69 |
| filingDate | 1952-04-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d5c8031583acc0a1ef437f958147fbfa |
| publicationDate | 1955-11-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-741047-A |
| titleOfInvention | Unsaturated ketones |
| abstract | By pyrolysing a tertiary acetylenic carbinylacetoacetate of the formula RR1C(CCH)O.CO.CHR2.CO.CH3 wherein R and R1 are aliphatic hydrocarbon radicals having up to 20 carbon atoms and R2 is hydrogen or an alkyl group having up to 5 carbon atoms, a ketone of the formula RR1C=CH-CH=CR2.CO.CH3 is obtained. An acidic catalyst, e.g. a mineral or organic sulphonic acid or ferric chloride is employed. The acetoacetates are prepared from diketene and the ethynyl carbinol, the tertiary carbon of which may form with R and R1 a cycloalkyl group. The following carbinols are specified: ethynyldimethyl-, ethylethynylmethyl-, ethynylmethyl-n-propyl-, n-, iso and tert. - butylethynylmethyl -, ethynyldi - n-(and iso-)propyl-, 1-ethynylcyclopentan-1-ol and 1 - ethynyl - 2 - (3 and 4-)methylcyclohexan - 1 - ol. For the formation of the acetoacetates either basic, e.g. tertiary amines, or acidic catalysts may be used, and also solvents such as benzene, chloroform or ethers. Detailed examples are given wherein 6-methylhepta-3 : 5 - dien - 2 - one, 6 - methylocta - 3 : 5-dien - 2 - one, 3 - ethyl - 6 - methylhept - 3 : 5-dien-2-one and 5-cyclohexylidenepent-3-en-2-one mixed with isomers of the latter are prepared. The preparation of the acetoacetates used as starting material is also described. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1953134-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008092655-A1 |
| priorityDate | 1952-04-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.