http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0259530-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e2e66b5309f6e6ea12409be1b4a93604 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D249-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D249-20 |
| filingDate | 1986-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1a8fae2ddd9f3315f5fc47993307b164 |
| publicationDate | 1988-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0259530-A1 |
| titleOfInvention | Method for preparing 2-phenylbenzotriazoles and 2-phenylbenzotriazole-N-oxides |
| abstract | A method for preparing a 2-phenylbenzotriazole of formula In wherein R₁ is H, Cl, C 1-4 alkyl, C 1-4 alkoxy, COOH or SO₃H; R₂ is H, Cl, C 1-4 alkyl or C 1-4 alkoxy; R₃ is H, Cl, C 1-12 alkyl, C 1-4 alkoxy, phenyl, (C 1-8 alkyl)phenyl, phenoxy or phenyl(C 1-4 alkyl); R₄ is H, Cl, OH or C 1-4 alkoxy; and R₅ is H, C 1-12 alkyl or phenyl(C 1-4 alkyl), comprises reducing a nitroazobenzene of formula IIIn wherein R₁, R₂, R₃, R₄ and R₅ are as defined above, with an aldehyde, in the presence of an aromatic ketone and base. n This method can be conducted in one or two steps. The individual steps, the first from the nitroazobenzene to a 2-phenylbenzotriazole-N-oxide of formula IIn and the second (II→I) are independent aspects of the invention. |
| priorityDate | 1986-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 272.