http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-902313-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_08e5126e16ad1c7aae67ba760e92e943 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-3021 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C8-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C8-06 |
| filingDate | 1960-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-08-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-902313-A |
| titleOfInvention | Novel photographic products, processes and compositions |
| abstract | 6-Dimethylaminomethyl - 2 - methoxy-4-nitrophenol is prepared by adding aqueous formaldehyde to a refluxing mixture of 2-methoxy-4-nitrophenol in ethanol and aqueous dimethylamine. The product may be reduced to 4 - amino - 2 - methoxy-6-methyl-phenol hydrochloride by dissolving in ethanol and hydrochloric acid and hydrogenating with palladium on barium sulphate catalyst. 6-Dimethylaminomethyl-2-ethoxy-phenol is similarly prepared from o-ethoxyphenol, and is reduced to 2-ethoxy-6-methyl-phenol using a copper chromite catalyst or palladium on barium sulphate catalyst. 4-Amino-2-ethoxy-6-methyl-phenol is prepared by coupling diazotized sulphanilic acid with 2-ethoxy-6-methyl-phenol and reducing the azo dye formed with sodium hydrosulphite. The following compounds are similarly prepared from the appropriate phenol; 4-amino-2-methoxyphenol, 4-amino-2-ethoxy-phenol, 4-amino-2-propoxyphenol, 4-amino - 2 - butoxy-phenol, 4-amino-2,6-dimethylphenol, 4-amino-2-methyl-6-propylphenol and 4-amino-2,6-dimethoxyphenol. Alternatively, 2,5-dichloroaniline may be used instead of sulphanilic acid. Specifications 684,592, 714,412, and U.S.A. Specifications 2,634,886, 2,698,237, 2,698,244 and 2,823,122 are referred to.ALSO:Azo dyes are prepared by coupling diazotized sulphanilic acid or 2:5-dichloro aniline with phenols having alkyl or alkoxy groups in the 2- and/or 6-positions. They are used as intermediates for p-aminophenols which they yield on reduction (see Group IV(b)). Specifications Specifications 684,592, 714,412 and U.S.A. Specifications 2,634,886, 2,698,237, 2,698,244 and 2,823,122 are referred to. |
| priorityDate | 1959-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 64.