http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-463042-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-143 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-14 |
| filingDate | 1935-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1937-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-463042-A |
| titleOfInvention | Improvements in the manufacture and production of dyestuffs |
| abstract | Polymethine dyes are prepared by condensing nitriles of the general formula <FORM:0463042/IV/1> or substitution or saponification products thereof (wherein R is hydrogen or an alkyl, oxyalkyl or aralkyl radicle) which are free from further primary or secondary amino groups with 2-methyleneindoline-w-aldehydes, or by condensing a nitrile of the general formula above or a substitution or saponification product thereof which is substituted by the aldehyde group in p-position with reference to the amino group with a compound containing a reactive methylene group which is capable of condensing with one aldehyde group with splitting off of one molecular proportion of water and formation of a carbon-carbon double linkage. The dyes derived from an indoline are generally water-soluble and suitable for dyeing tannin-mordanted cotton and acetate artificial silk; the dyes derived from compounds having a reactive methylene group such as cyanacetic esters or anilides, malonic acid dinitrile or acetoacetic arylides are water-insoluble dyes suitable for dyeing acetate artificial silk. In examples: (a) N-ethyl-N-phenyl - b - aminopropionitrile is treated in benzene in presence of phosphorus oxychloride with 1.3.3-trimethyl-2-methyleneindoline-w-aldehyde (the nitrile group in the dye may be subsequently saponified) and with 5-methoxy-1.3.3-trimethyl-2-methyleneindoline-w-aldehyde; (b) N-benzyl-N-phenyl-b -aminopropionitrile is treated in benzene in presence of phosphorus oxychloride with 5-methoxy - 1.3.3 - trimethyl - 2 - methyleneindolene - w - aldehyde: (c) N - methyl - N-b -propionitrile-p-aminobenzaldehyde (prepared by condensing N-methyl-N-phenyl-b -aminopropionitrile with methylformanilide and phosphorus oxychloride) is condensed with 5-methoxy-1.3.3-trimethyl-2-methyleneindoline in glacial acetic acid, and with cyanoacetic acid ethyl ester in ethyl alcohol in presence of piperidine: (d) N-ethyl-N-b -propionitrile-p-aminobenzaldehyde is condensed with cyanoacetic acid ethyl ester in alcohol in presence of piperidine. Specification 441,389 is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-742039-C http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-744019-C |
| priorityDate | 1935-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.