http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2239505-A1
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 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-23 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-12 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_3eaa4902483289468ed8b056fe955aa1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a6369f9f0175d0a5d789532dedd0f783 |
| publicationDate | 1997-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2239505-A1 |
| titleOfInvention | Process of preparation for catechol derivative |
| abstract | The present invention is directed to an improved process for producing a catechol derivative (1) useful as an intermediate of pharmaceuticals and agricultural chemicals. The process is characterized in that formulation in the first step is carried out in the two stages, that is, the reaction is carried out in the presence of a tin catalyst at 60-85°C to a conversion of 30 to 80% and then is completed at 95=105°C to produce a salicylaldehyde derivative (3) in a high yield and a high selectivity. Thereby, the objective catechol derivative (1) can be obtained in a high yield and with a high purity. As shown below wherein R is alkyl, cycloalkyl, aralkyl, alkoxy, halogen atom, allyl, or aryl, and R1 is a hydroxy protective group. |
| 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: 21.