http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-385267-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/G03C1-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-16 |
| filingDate | 1931-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1932-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-385267-A |
| titleOfInvention | Improvements in and relating to the manufacture of light sensitive materials |
| abstract | Cyclammonium polymethine dyes.--Cyanine dyes for sensitizing photographic gelatino-silver halide emulsions are prepared from a m -methylnaphthothiazole. Such dyes comprise the thiocarbocyanines containing a naphthothiazole nucleus only, the thioisocyanines and thio-pseudocyanines containing both a naphthothiazole and a quinoline nucleus. In examples, (1) 1-methyl-a -naphthothiazole is condensed with ethyl-p-toluenesulphonate and the resulting quaternary ammonium salt condensed with quinoline ethiodide in presence of caustic potash to give 1<1> : 2-diethyl-5 : 6-benzothioisocyanine iodide; (2) by carrying out the above process on 2-methyl-b -naphthothiazole 1<1> : 2-diethyl-3 : 4-benzothioisocyanine iodide is obtained; (3) 2-methyl-b -naphthothiazole is condensed with ethyl-p-toluenesulphonate and the product decomposed with potassium iodide to give the quaternary ammonium ethiodide. The latter is heated with 2-iodoquinoline ethiodide in presence of caustic potash to give 1<1> : 2-diethyl-3 : 4-benzothio-pseudocyanine iodide; by starting from 1-methyl-a -naphthothiazole ethiodide there is obtained 1<1> : 2-diethyl-5 : 6-benzothiopseudocyanine iodide; (4) 2-methyl-b -naphthothiazole ethyl-p-toluenesulphonate is condensed with triethyl orthoacetate, and on adding ammonium bromide 8-methyl-2 : 2<1>-diethyl-3 : 4 : 3<1> : 4<1>-dibenzothiocarbocyanine bromide is obtained; (5) 1-methyl-a -naphthothiazole is condensed with allyl iodide and the product with ethyl orthoformate to give 2 : 2<1>-diallyl-5 : 6 : 5<1> : 6<1> - dibenzothiocarbocyanine iodide. In the above processes substituted quinolines and substituted m -methylnaphthothiazoles may also be employed. Specification 359,463 is referred to. |
| priorityDate | 1930-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.