http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1502285-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_01dc8a8a3ae90ebd3658b65c494e2a4d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-650905 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C7-384 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C7-384 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-6509 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-20 |
| filingDate | 1974-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1978-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1502285-A |
| titleOfInvention | Preparation of 4-monohalo-2-pyrazolin-5-ones |
| abstract | 1502285 Production of 4-monohalo-2-pyrazolin-5-ones AGFA-GEVAERT 2 Dec 1975 [11 Dec 1974] 53616/74 Headings C2C and C2P 4 - Monohalo - 2 - pyrazolin - 5 - ones are prepared by the reaction of a tertiary organic phosphite with a 4,4-dihalo-2-pyrazolin-5-one and subsequent hydrolysis of the 4-monohalopyrazole-5-enol phosphate ester formed. The process is particularly suitable for producing products of the general formula in which X is halogen, R<SP>1</SP> is optionally substituted C 1-20 alkyl, optionally substituted aryl, or optionally substituted 5- or 6-membered heterocycle and R<SP>2</SP> is optionally substituted C 1-20 alkyl, C 1-20 alkoxy, amino or substituted amino groups. The reaction is preferably conducted at 10-80 C. in an inert solvent such as benzene or acetonitrile using a trialkyl phosphite such as triethyl phosphite. Amongst the examples the compound 1-phenyl-3-(4-chloroanilino) - 4 - chloro - 2 - pyrazolin - 5 - one is prepared. 1 - Phenyl - 3 - (4 - chloroanilino) - 4 - chloro - 5- diethoxy phosphate pyrazole is prepared by reaction of triethyl phosphite and 1-phenyl-3- (4-chloroanilino)-4,4-dichloro-2-pyrazolin-5-one. |
| priorityDate | 1974-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.