http://rdf.ncbi.nlm.nih.gov/pubchem/patent/IE-51196-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_70ec63d39d6704bacc5c7068c93ded43 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C255-53 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N37-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-53 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-39 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01P7-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N53-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-00 |
| filingDate | 1981-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1986-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | IE-51196-B1 |
| titleOfInvention | Process for preparing cyclopropane carboxylic acid ester derivatives |
| abstract | This invention relates to the preparation of cyclopropane carboxylic acid ester derivatives, which are useful as pesticides. There is provided a process for preparing a mixture of cis-isomers of a compound of formula (I) wherein R1 and R2 are independently selected from chlorine, bromine and methyl, consisting predominantly of the 1R cis S- and 1S cis R- isomers, which process comprises dissolving a mixture of 1S cis S- and 1R cis R- isomers of the compound of formula I, alone or in the presence of 1R cis S- and 1S cis R-isomers, in an organic amine base containing from 5 to 7 carbon atoms and being a secondary amine containing two branched alkyl groups or a tertiary amine, crystallizing out from a resulting solution of cis- isomers of formula I in the organic amine base a 1:1 mixture of the 1R cis S- and 1S cis R- isomers, and evaporating off the organic amine base. The process of the invention yields a product which may contain up to twice as much of the most active isomer of the compound of formula I as a racemic mixture of all four cis-isomers, and is a readily effected process which does not involve any sterospecific synthesis or optical resolution steps. |
| priorityDate | 1980-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.