| Predicate |
Object |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D263-57 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D263-56 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C301-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D263-57 |
| filingDate |
1981-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1981-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0034256-A3 |
| titleOfInvention |
4-phenyl-benzaldehyde-2-sulphonic acids and their preparation |
| abstract |
Compounds of the formula wherein R is hydrogen, halogen, an optionally modified carboxylic acid or sulfonic acid group, is obtained in example from the fact that in compounds of the formula converts the aminomethyl group according to Sommelet into the aldehyde group.n n n The new aldehydes are the raw materials for productionnvaluable optical brightener of the stilbene type. |
| priorityDate |
1980-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |