http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0900775-A4
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f9ba304908c7187b486482f16a0f6158 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-55 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C41-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-71 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-55 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-68 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-71 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-55 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C41-26 |
| filingDate | 1996-12-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a6369f9f0175d0a5d789532dedd0f783 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3eaa4902483289468ed8b056fe955aa1 |
| publicationDate | 1999-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0900775-A4 |
| titleOfInvention | PROCESS FOR PRODUCING CATECHOL DERIVATIVES |
| abstract | An improved process for producing catechol derivatives (1) useful as intermediates for compounds useful as drugs or agricultural chemicals, which comprises the reaction steps shown above. In said process (I), R represents alkyl, cycloalkyl, aralkyl, alkoxy, halogeno, allyl or aryl, and R1 represents a hydroxy-protecting group. The process is characterized in that formylation as the first step is conducted in the presence of a tin catalyst in two stages, first at 60 to 85 °C to a conversion of 30 to 80 % and then at 95 to 105 °C to completion, to thereby obtain a salicylaldehyde (3) in a high yield with a high selectivity. The objective catechol derivatives (1) having a high purity are hence obtained in a high yield. |
| priorityDate | 1995-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.