http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-380140-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9799ffcda2dbb45041a5ab0fd08dd5fe |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-04 |
| filingDate | 1931-03-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1932-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-380140-A |
| titleOfInvention | Improvements in and relating to the manufacture of light-sensitive materials |
| abstract | Thioisocyanine dyes which are of use for sensitizing photographic emulsions are prepared by condensing a m -methylnaphthothiazole quaternary salt with a quinolinium quarternary salt. In examples: 1 - methyl - a - naphthothiazole ethyl-p-toluenesulphonate is condensed with quinoline ethiodide in presence of caustic potash to give 1<1>.2-diethyl-5 : 6-benzothioisocyanine iodide: (2) by the same treatment as in (1) applied to 2-methyl-b -naphthothiazole ethiodide a product 1<1> , 2-diethyl-3 : 4-benzothio-isocyanine iodide is obtained. Substituted quinolines and substituted m -methylnaphthothiazoles may similarly be used. Thus 6 - methylquinoline ethyl bromide (made by condensing 6-methylquinoline with ethyl bromide) is condensed with 2-methyl-b -naphthothiazole ethyl-p-toluenesulphonate to give 6<1>-methyl-1<1> : 2-diethyl-3 : 4-benzothio-isocyanine bromide, and 6-methoxyquinoline methyl-p-toluenesulphonate (made by condensing 6-methoxyquinoline with methyl-p-toluenesulphonate is condensed with 2-methyl-b -naphthothiazole methyl-p-toluenesulphonate to give 1<1> : 2-dimethyl-6-methoxy-3 : 4-benzthioisocyanine bromide on addition of ammonium bromide. In the case when substituted n -methylnaphthothiazoles are employed as starting materials these may be derived from the corresponding aminonaphthalene, for instance 4-amino-1-naphthol ethyl ether, in the known manner. |
| priorityDate | 1930-03-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.