| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-64 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-10 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-343
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-734
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-732
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-58
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-353
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-73 |
| filingDate |
1981-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1db4e83af287c35ea6bc862aaa6109dd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6d18eff8fea607f593ed4f33a165c6c5 |
| publicationDate |
1981-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0036159-A1 |
| titleOfInvention |
4-(2,5-Dihydroxyphenyl-1) crotonic acid and its derivatives, and processes for the preparation of these compounds |
| abstract |
The invention relates to 4- (2,5-dihydroxyphen-1-yl) crotonic acid and its derivatives (I) <IMAGE> (R 1 -R <4> = H; C1-C8-alkyl; R <5> = H; C1-C30-alkyl; C2-C30-alkenyl; R '= H; hydrolytically removable organic radical as R'OH or R'-COOH) and a process for the preparation of the compounds I by using a hydroquinone II <IMAGE> in the presence from 0.1 to 2 moles per mole II of a Lewis acid a) with a vinyl glycolic acid derivative IIIa <IMAGE> or b) with a crotonic acid derivative IIIb <IMAGE> where X is halogen, the hydroxyl group or a C1-C4-alkoxy or acyloxy group, implements. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0183532-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0183532-A3 |
| priorityDate |
1980-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |