http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-9518704-D0
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ba045776bcd32d32e3100da8dfce4e28 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C235-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C311-51 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-44 |
| filingDate | 1995-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1995-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-9518704-D0 |
| titleOfInvention | Chemical process |
| abstract | A process for the purification of a compound of general formula I:wherein:R1 is hydrogen or C1-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 COOR4, COR6, CONR4R5 or CONHSO2R4;R4 and R5 are each independently hydrogen or C1-C4 alkyl optionally substituted with one or more halogen atoms;R6 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; or, where appropriate, a salt thereof;from a mixture containing the compound of general formula I together with one or more isomers or di-nitrated analogues thereof; the process comprising dissolving the mixture in a suitable crystallisation solvent and recrystallising the product from the resulting crystallisation solution;characterised in that the crystallisation solution contains not more than 25% loading of the compound of general formula I wherein loading is defined as:and in that the temperature to which the solution is cooled for crystallisation is not greater than about 30° C. |
| priorityDate | 1995-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID458392451 |
Total number of triples: 18.