http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6425744-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/Y02P20-52 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-353 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B31-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C61-37 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B55-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-08 |
| filingDate | 1988-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_918dcdf1dd46ce3883fad9a32b7f2fa5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_719b9499e69b3427d8cc79d865715645 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d13a5591e9db3723950380fefc0c5835 |
| publicationDate | 1989-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6425744-A |
| titleOfInvention | Racemization of chrysanthemumic acid derivative |
| abstract | PURPOSE:To obtain an optically active racemic chrysanthemumic acid derivative useful as a raw material for insecticides of pyrethroid type, rich in trans-form efficiently and in high purity, by racemizing an optically active chrysanthemumic acid derivative in the presence of both a silicon bromide compound and an azo compound. CONSTITUTION:An optically active chrysanthemumic acid derivative shown by the formula (X is Cl, Br or 2,2-dimethyl-3-isobutenylcyclopropanecarboxyl; *is asymmetric carbon) is racemized with a silicon bromide compound such as trimethylsilyl bromide and/or a phosphorus bromide compound such as PBr3 in the presence of a peroxide such as t-butyl hydroperoxide or an azo compound such as azobisisobutyronitrile in an inert organic solvent, preferably toluene for several minutes - 10hr to give the aimed compound. The reaction temperature is -20-100 deg.C in the case of the acid halide and 50-140 deg.C in the case of the anhydride. The racemic modification can produce various pyrethroids simply and in high yield. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6425745-A |
| priorityDate | 1987-04-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.