http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0029092-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_24aca9ded2638ea793d05360dde7a4a0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-93 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-673 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-67 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-93 |
| filingDate | 1980-08-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b6b7b94c8d4383a99b0511eda6cf9569 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d02cef9ea0a72acee8bb459b53463786 |
| publicationDate | 1981-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0029092-A1 |
| titleOfInvention | Cis-(1R,2S)-3,3-dimethyl-2-((4S)-3-methyl-2-(2-propynyl)cyclopent-2-en-1-on-4-yloxyhydroxymethyl)-cyclopropanecarboxylic lactone and method of producing (S)-4-hydroxy-3-methyl-2-(2-propynyl)-cyclopent-2-en-1-on |
| abstract | The present invention relates to a process for preparing (S)-4-hydroxy-3-methyl-2-(2-propynyl)-cyclopent-2-en-1-one, an important intermediate for the synthesis of insecticides, which comprises condensing cis-(1R,2S)-3,3-dimethyl-2-(dihydroxymethyl)-cyclopropanecarboxylic-lactone, wherein R 2 is a hydrogen atom or a C 1 -C 4 alkyl group, with (RS)-4-hydroxy-3-methyl-2-(2-propynyl)-cy- clopent-2-en-1-one in the presence of an acidic catalyst while removing a compound of the formula, R 2 OH wherein R 2 is as defined above, the byproduct from the reaction system, to form cis-(1R, 2S)-3,3-dimethyl-2-[(4S)-3-methyl-2-(2-propynyl)-cyclopent-2-en-1-on-4-yloxyhydroxymeth- yl]-cyclopropanecarboxylic lactone as a crystalline form separated from the mixture, and solvolyzing the cis-(1R, 2S)-3,3-dimethyl-2-[(4S)-3-methyl-2-(2-propynyl)-ciclo- pent-2-en-1-on-4-yloxyhydroxymethyl]-cyclopropane-carboxylic lactone with a compound of the formula, R 1 OH wherein R, is a hydrogen atom or a C 1 -C 4 alkyl group, in an alkaline condition or in the presence of an acidic catalyst. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0153653-A1 |
| priorityDate | 1979-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 56.