http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1038340-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_24aca9ded2638ea793d05360dde7a4a0 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C61-35 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-313 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C61-04 |
| filingDate | 1963-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1038340-A |
| titleOfInvention | Process for the production of pyrethic acid |
| abstract | Pyrethric acid in a purified state, is prepared by heating t-butyl pyrethrate at 180-350 DEG C. The t-butyl pyrethrate is preferably obtained in a series of steps from t-butyl chrysanthemum mono-carboxylate which is oxidized with selenium dioxide or selenious acid to t-butyl 2,2 - dimethyl - 3 - (21 - formyl - 11 - propanyl) -cyclopropane-carboxylate, which is oxidized in the presence of a copper salt or silver oxide to 2 - methyl - 3 - (21, 21 - dimethyl - 31 - t - butoxycarbonyl - cyclopropyl) - acrylic acid which is methylated e.g. under alkaline conditions with diazomethane or dimethyl sulphate, to the t-butyl pyrethrate. |
| priorityDate | 1962-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.