GB599631A - Polymethin dyes and photographic emulsions containing them - Google Patents

Polymethin dyes and photographic emulsions containing them

Info

Publication number
GB599631A
GB599631A GB1737345A GB1737345A GB599631A GB 599631 A GB599631 A GB 599631A GB 1737345 A GB1737345 A GB 1737345A GB 1737345 A GB1737345 A GB 1737345A GB 599631 A GB599631 A GB 599631A
Authority
GB
United Kingdom
Prior art keywords
ethyl
thio
oxazoledione
benzthiazolylidene
prepared
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1737345A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB599631A publication Critical patent/GB599631A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/10The polymethine chain containing an even number of >CH- groups
    • C09B23/105The polymethine chain containing an even number of >CH- groups two >CH- groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)

Abstract

Cyanine dyes are prepared by condensing cyclammonium quaternary salts having a b -cycloalkyl-b -(alkylmercapto) vinyl group in which the cycloalkyl group contains from 3 to 6 carbon atoms attached to the carbon atom in the a -position to the quaternary nitrogen atom of a benzthiazole, a - or b -naphthathiazole, or a benzselenazole with a 2-thio-2 : 4-oxazoledione or with a a -thio-2 : 4-thiazoledione. The condensation may be effected in presence of a basic condensing agent, e.g. triethylamine, N-methyl-piperidine or pyridine. 3 - Ethyl - 5 -[(3 - ethyl - 2 - benzthiazolylidene) - a - cyclopropylethylidene] - 2 - thio - 2 : 4 - oxazoledione is prepared by heating together 2-cyclopropyl-thioformylmethylene-3-ethylbenzthiazoline and methyl p-toluenesulphonate, dissolving in absolute ethyl alcohol and refluxing with 3-ethyl-2-thio-2 : 4-oxazoledione in presence of triethylamine. 3-Ethyl-5-[(3-ethyl-2-benzthiazolylidene) -a -cyclohexylethylidene]- 2 - thio-2 : 4-oxazoledione, 3 - ethyl - 5 -[(b - ethyl - 2 - benzthiazolylidene) - a - cyclobutylethylidene] - 2 - thio - 2 : 4 - oxazoledione, and 3 - ethyl - 5 -[(3 - ethyl - 2 - benzthiazolylidene) - a - cyclopropylethylidene]-rhodanine are similarly prepared. Specifications 538,857, 597,329 and 599,636 are referred to.
GB1737345A 1944-08-11 Polymethin dyes and photographic emulsions containing them Expired GB599631A (en)

Publications (1)

Publication Number Publication Date
GB599631A true GB599631A (en) 1948-03-17

Family

ID=1733059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1737345A Expired GB599631A (en) 1944-08-11 Polymethin dyes and photographic emulsions containing them

Country Status (1)

Country Link
GB (1) GB599631A (en)

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