http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-538857-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-105 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-06 |
| filingDate | 1939-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1941-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-538857-A |
| titleOfInvention | Improvements in the production of dyes of the cyanine type and intermediates therefor |
| abstract | 538,857. Photographic sensitizing dyes; intermediates. KODAK, Ltd. (Eastman Kodak Co.). Dec. 15, 1939, No. 929. Divided out of 533,425. [Class 2 (iii)] [Also in Group XX] Mercaptovinyl derivatives of the general formula shown in Fig. 1. where Q = S or SC, O = phenylene or naphthylene, R = alkyl or substituted alkyl, e.g. methyl, ethyl, butyl, allyl, benzyl, or #-ethoxyethyl, R' = alkyl, substituted alkyl, aryl or a heterocyclic group, R<SP>11</SP> = alkyl, and X = an acid anion, are made by.reacting a thioketone of the general formula shown in Fig. 2 with an alkyl ester, particularly an alkyl p-toluenesulphonate. The thioketones of the above formula may be made by the process of Specification 533,425. The mercaptovinyl derivatives can be converted into cyanine dyes, which are photographic sensitizers, by condensation with compounds containing reactive methyl or methylene groups. In examples, (1) 3-methyl-2-thiopropenylmethylene benzthiazoline is heated with methyl p-toluenesulphonate and the product is condensed with 2-methyl-#-naphthoxazole methiodide, (2) 1-ethyl-2-thioacetylmethylene-#- naphtha,thiazoline is heated with methyl ptoluenesulphonate and the product condensed with (a) 2 : 4-dimethylthiazole ethiodide, (b) 2- methylbenzthiazole ethiodide, (c) 2-methyl-#- naphthathiazole etho-p-toluenesulphonate, and (d) 3-ethylrhodanine, (3) 2-(3-methylmercapto- 1-butenyl)-#-naphthathiazole metho-p-toluenesulphonate is condensed with2 -methylthiazoline methiodide, and (4) 3-ethyl-2-thioacetylmethylenebenzthiazoline is heated with methyl p-toluenesulphonate and the product condensed with 3-ethyl-2-thio-2 : 4-oxazoledione. The Provisional Specification refers also to the preparation of cyanine dyes by condensing the mercaptovinyl derivatives with primary or secondary amines. |
| priorityDate | 1939-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.