http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1360490-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-807 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C49-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-0041 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06L4-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-46 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06L3-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-807 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B62-503 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-41 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B57-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-46 |
| filingDate | 1971-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1974-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1360490-A |
| titleOfInvention | 3- 3,4, - dichloro -6,- alkylphenyl - delta2 - pyrazoline deriva tives and a process for their manufacture |
| abstract | 1360490 Pyrazolines FARBWERKE HOECHST AG 19 April 1971 [11 March 1970] 23815/71 Heading C2C [Also in Division C5] Compounds of formula wherein R is a C 1 -C 4 alkyl group, R<SP>1</SP> is hydrogen or an optionally substituted pheny group, and X is an ethylenically unsaturated radical or an optionally substituted saturated aliphatic radical are prepared by one or more of (a) condensation of a 3,4-dichloro-6-R-phenylketone with a hydrazinophenyl sulphone, (b) esterification of a hydroxyalkyl sulphone, (c) splitting of an ester group formed in (b), optionally without isolation, to form a double bond, (d) hydrogenation of a double bond formed in (c), (e) additive saturation of a double bond formed in (c) by reaction with a compound having at least one active hydrogen atom, (f) quaternization of an amino compound formed in (e), or (g) conversion of a compound wherein X is a hydroxy group to the corresponding sulphinic acid salt and reacting this with an optionally substituted alkyl halide or with an epoxide. The products are optical brightening agents. 3,4 - Dichloro - 6 - R- or 6 - H - acetophenones, propiophenones and #-chloro-propiophenones are prepard by Friedel-Crafts acylation. The sodium salt of 2-sulphostyryl-3<SP>1</SP>,4<SP>1</SP>-dichloro- 6<SP>1</SP>-methyl-phenyl ketone is prepared by reaction of 3,4-dichloro-6-methyl-acetophenone with the sodium salt of benzaldehyde-2-sulphonic acid. 2,4-Dichloro-n-propyl-benzene is prepared by reduction of 2,4-dichloro-propiophenone. The compounds of Formula I are used as optical brighteners for polymers, which may be added before or after polymerization. In an example, an acrylonitrile copolymer containing a brightener is spun from DMF solution. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4036851-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7300474-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3988346-A |
| priorityDate | 1970-03-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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