http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9905087-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ba045776bcd32d32e3100da8dfce4e28 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-40 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C311-51 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B43-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-38 |
| filingDate | 1998-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_128d51c248665c47d3bbeb1a36b4d36f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3b1688951f0bafed091ffa2602c99eb3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c9e5f6ac8a796c92a5846db815a38708 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d6e8ad86d725e106c66390c9b97bfe8 |
| publicationDate | 1999-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-9905087-A1 |
| titleOfInvention | Nitration process for diphenyl ethers |
| abstract | A process for the preparation of a compound of general formula (I), wherein R1 is hydrogen or C¿1?-C6 alkyl, C2-C6 alkenyl or C2-C6 alkynyl, any of which may optionally be substituted with one or more substituents selected from halogen and OH; or COOR?4, COR6, CONR4R5¿ or CONHSO¿2?R?4; R4 and R5¿ are each independently hydrogen or C¿1?-C4 alkyl optionally substituted with one or more halogen atoms; R?6¿ is a halogen atom or a group R4; R2 is hydrogen or halo; R3 is C1-C4 alkyl, C2-C4 alkenyl or C2-C4 alkynyl, any of which may optionally be substituted with one or more halogen atoms; or halo; the process comprising reacting a compound of general formula (II), wherein R?1, R2 and R3¿ are as defined for general formula (I) with a nitrating agent comprising nitric and sulphuric acids in the presence of an organic solvent and in the presence of acetic anhydride, the molar ratio of acetic anhydride to compound of general formula (II) is from about 1:1 to 3:1 characterised in that the acids are added sequentially to the reaction mixture. |
| priorityDate | 1997-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 114.