http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1431448-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_16890954fa97fa1ea88523e23b283152 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D233-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D249-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D249-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B57-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D249-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D521-00 |
| filingDate | 1973-04-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1431448-A |
| titleOfInvention | Coumarin derivatives |
| abstract | 1431448 Coumarin derivatives PRODUITS CHIMIQUES UGINE KUHLMANN 18 April 1973 [18 April 1972] 18650/73 Heading C2C The invention comprises compounds of Formula I where R is C 1 -C 5 alkyl optionally substituted by a non-ionic non-chromophoric group, one of R 1 and R 2 is a triazole radical and the other is hydrogen, halogen or C 1 -C 3 alkyl, the triazole is optionally substituted by one or two groups selected from C 1 -C 3 alkyl or benzene radicals optionally substituted by up to three substituents. These compounds may be obtained (a) by reacting a diazonium salt II with a coumarin III (the process exemplified) (b) by reacting an orthohydroxybenzaldehyde IV with an acid V or a functional derivative (e.g. alkali metal salt, nitrile, methyl or ethyl ester) thereof (c) by alkylating with for example an alkyl sulphate a compound of Formula I in which R is H. The preparations of diazo compounds II from the corresponding amines are described. Also described is the preparation of I, in which R 1 =CH 3 , R 2 =4,5 - dimethyl - 1,2,3 - triazol- 2-yl and R 3 =Cl, by treatment of the corresponding N 1 oxide with Zn/HCl, the N 1 oxide itself being obtained by reaction of the N 1 oxide of the corresponding compound II with 7-methoxycoumarin. The compounds are used as optical brighteners for polyester fibres. |
| priorityDate | 1972-04-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.