http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-755446-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9d757a010abaaa7cd45b5a33e46ca149 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D471-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-14 |
| filingDate | 1954-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3545b6964216e4a95b92c8afa308ea28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_316149088c2dabf6fa8d0352dd565b65 |
| publicationDate | 1956-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-755446-A |
| titleOfInvention | Improvements in or relating to heterocyclic compounds |
| abstract | The invention comprises compounds of the general formula <FORM:0755446/IV(a)/1> wherein R is an alkyl or aralkyl group and R1 and R2 are the same or different and are each hydrogen, halogen or alkoxy, and salts and quaternary salts thereof; and their preparation by condensation of 2,6-diamino-3-nitroso-pyridine with a suitably substituted O-acyl indoxyl in solution or suspension in a solvent in an inert atmosphere in the presence of an acid binding condensing agent such as sodium carbonate, sodium bicarbonate, a sodium alkoxide or piperidine followed if desired by treatment with an acid or quaternizing agent. Examples describe the preparation of (1) compounds of the above general formula in which R1 and R2 are hydrogen and R is methyl, ethyl, propyl, amyl and benzyl; and the methosulphate, hydrochloride and acetate of the compound in which R is methyl; (2) 31 - amino - 6 - bromo - 9 - methyl-1,4,9,41 - tetra - aza - 2,3 - 61, 51 - benzofluorene, the corresponding 6-chloro compound and its ethane sulphonate, (3) 31-amino-6,7-dimethoxy-9 - methyl - 1,4,9,41 - tetra - aza - 2,3 - 61, 51-benzofluorene; and (4) 31-amino-6,8-dichloro-9 - methyl - 1,4,9,41 - tetra - aza - 2,3 - 61, 51-benzofluorene. According to the Provisional Specification, R1 and R2 in the general formula above may additionally represent nitro or amino groups. |
| priorityDate | 1954-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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