http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0134782-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e42866d6c3cedbae517fbec85cb1a88a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C233-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C233-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-18 |
| filingDate | 1983-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_107905b821ff530a446979bd0f9b73cf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7e901a8b64e8aac3b4d0929e9bdbef52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad3601d3d7dd279f2327722b17feced1 |
| publicationDate | 1985-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0134782-A1 |
| titleOfInvention | Process for the preparation of 3-amino-5-hydroxybenzoic acids and derivatives and analogues thereof |
| abstract | Process for the preparation of compounds of general formula (2), in which R1 represents the radicals -OR2 or -NR3R4; and where R2, R3, R4, R5, R6 and R7 represent radicals chosen separately from hydrogen and alkyl, or their acid addition salts, comprising: a) the reaction of a 3,5-dihydroxybenzoic acid of general formula ( 3) with a compound of general formula (4), where R3, R4, R5, R6, and R7 are defined as before, to produce a compound of general formula (2b), where R3, R4, R5, R6 and R7 are defined as before; and, when preparing compounds of general formula (2) where R1 represents the radical -OR2, further comprising b) hydrolysis of the compound of general formula (2b) to produce a carboxylic acid of general formula (2c) where R3, R4, R5, R6 and R7 are defined as before; and c) esterifying the acid of general formula (2c) to produce an ester of general formula (2d) where R2 represents an alkyl and R3, R4, R5, R6 and R7 are defined as before; or, when compounds of general formula (2) are prepared in which R1 represents the radical -OR2 and R2 an alkyl, comprising d) esterification of the amide of general formula (2b) in an acid medium to produce an ester of general formula (2d). |
| priorityDate | 1982-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 150.