| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5736c85c1929ce4e9775e836a65d6c05
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e2e66b5309f6e6ea12409be1b4a93604 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C219-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D215-233
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D215-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C255-30 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D215-233
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D215-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D215-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C219-20 |
| filingDate |
1995-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1998-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d47bc5c3ed1bca99884b3f78fe10bd6d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d88f87fa44aa224a6331b74bd5f5edc6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5f871e154aa7ff17504f3d19d1b6ded9 |
| publicationDate |
1998-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5731440-A |
| titleOfInvention |
Intermediates for producing 5,7-dichloro-4-hydroxyquinoline |
| abstract |
An industrially advantageous process for producing 5,7-dichloro-4-hydroxyquinoline (DCHQ) useful as an intermediate for agrohorticultural bactericides. The process comprises (i) hydrolyzing 3-cyano- or 3-ethoxycarbonyl-5,7-dichloro-4-hydroxyquinoline into 5,7-dichloro-3-carboxy-4-hydroxyquinoline (DCQA) in the presence of hydrochloric, sulfuric or phosphoric acid and (ii) decarboxylating the formed DCQA into DCHQ in the presence of sulfuric or phosphoric acid. In particular, this process comprises continuously conducting the hydrolysis of 5,7-dichloro-3-ethoxycarbonyl-4-hydroxyquinoline and the decarboxylation of the hydrolyzate in the presence of sulfuric acid having a specified concentration. The invention also relates to a process for producing DCQA by hydrolyzing 3-cyano- or 3-ethoxycarbonyl-5,7-dichloro-4-hydroxyquinoline in the presence of hydrochloric, sulfuric or phosphoric acid and a process for producing DCHQ by decarboxylating DCQA in the presence of sulfuric or phosphoric acid. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6465653-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006020029-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9963421-B2 |
| priorityDate |
1994-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |