http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0823890-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-734 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-327 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-333 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-734 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-343 |
| filingDate | 1996-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_944b5c8628c553164788572be330cd6b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_60abcaf283ac49d95ee8dffb29cc0113 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f4ea6396cf5e5407de0c956c203ab22c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_66350d70211ea3d166bea904a48d2549 |
| publicationDate | 1998-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0823890-A1 |
| titleOfInvention | Process and intermediate products for preparing substantially isomer-pure e-2-(2-aryloxymethylene phenyl)-crotonic acid methyl esters |
| abstract | PCT No. PCT/EP96/01689 Sec. 371 Date Oct. 9, 1997 Sec. 102(e) Date Oct. 9, 1997 PCT Filed Apr. 23, 1996 PCT Pub. No. WO96/34847 PCT Pub. Date Nov. 7, 1996A process for the preparation of essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonates of the formula Ia <IMAGE> Ia where R is an aromatic radical and R' is a C1-C3-alkyl group, which comprises first converting a suitable methyl 2-(2-aryloxymethylenephenyl)- alpha -ketoacetate with an alkyl metal compound of the formula IIIM-CH2-R'IIIwhere M is a metal ion equivalent into the corresponding methyl 2-(2-aryloxymethylenephenyl)- alpha -hydroxybutyrate of the formula IV, subsequently dehydrating IV in the presence of an acid to give a mixture of methyl E- and Z-2-(2-aryloxymethylenephenyl)crotonates and, subsequently, converting this mixture in the presence of a base in an inert polar solvent into the essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonate Ia. |
| priorityDate | 1995-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.