GB369236A - Improvements in or relating to the manufacture of dyes - Google Patents

Improvements in or relating to the manufacture of dyes

Info

Publication number
GB369236A
GB369236A GB3798130A GB3798130A GB369236A GB 369236 A GB369236 A GB 369236A GB 3798130 A GB3798130 A GB 3798130A GB 3798130 A GB3798130 A GB 3798130A GB 369236 A GB369236 A GB 369236A
Authority
GB
United Kingdom
Prior art keywords
acid
ethiodide
anhydride
condensed
molecule
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
GB3798130A
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ilford Ltd filed Critical Ilford Ltd
Priority to GB3798130A priority Critical patent/GB369236A/en
Publication of GB369236A publication Critical patent/GB369236A/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
    • C09B23/02Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/06Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups three >CH- groups, e.g. carbocyanines
    • 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
    • C09B23/02Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/04Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups one >CH- group, e.g. cyanines, isocyanines, pseudocyanines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Thiazole And Isothizaole Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)

Abstract

Carbocyanine dyes, having a substituent in the carbocyanine chain are produced by treating two molecular proportions of a quaternary salt of a heterocyclic nitrogenous base having an active a -methyl group with at least two molecular proportions of an organic carboxylic acid anhydride, in the presence of not more than one molecular proportion of an acid-binding substance, e.g. the salt of a weak acid. If acetic anhydride is used as the acid anhydride, an a -acetylmethyl derivative of the quaternary salt is first formed, with liberation of a molecule of acetic acid, and a second molecule of the quaternary salt then condenses with the acetyl derivative, a further molecule of acetic anhydride being used as a dehydrating agent, and the acid-binding substance removing one molecule of the hydriodic or other acid of the quaternary salt. According to examples, (1) acetic anhydride is condensed with 1-methylbenzthiazole ethiodide, 2 : 3 : 3-trimethylindolenine ethiodide, quinaldine ethiodide, 1-methylbenzoxazole ethiodide, 1-methyl-3 : 4-benzbenzthiazole ethiodide and 1-methyl-5 : 6 - benzbenzthiazole ethiode, by heating under reflux in the presence of anhydrous sodium acetate: (2) 1-methylbenzoxazole ethiodide is similarly condensed with benzoic anhydride: (3) 1-methylbenzthiazole ethiodide is condensed with acetic anhydride in the presence of sodium formate. Sodium salicylate is also mentioned as an acid-binding agent, and propionic anhydride as a suitable anhydride. Many of the products are photographic sensitizers. Specification 232,740, [Class 2 (iii), Dyes &c.], is referred to. According to the Provisional Specification, acid anhydrides may be condensed with quaternary salts of heterocyclic nitrogenous bases having either a reactive hydrogen atom or methyl group in the a or g positions. For example, benzthiazole ethiodide may be condensed with acetic anhydride. Quinoline and lepidine are also mentioned as suitable bases whose quaternary salts may be used.
GB3798130A 1930-12-16 1930-12-16 Improvements in or relating to the manufacture of dyes Expired GB369236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3798130A GB369236A (en) 1930-12-16 1930-12-16 Improvements in or relating to the manufacture of dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3798130A GB369236A (en) 1930-12-16 1930-12-16 Improvements in or relating to the manufacture of dyes

Publications (1)

Publication Number Publication Date
GB369236A true GB369236A (en) 1932-03-16

Family

ID=10400373

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3798130A Expired GB369236A (en) 1930-12-16 1930-12-16 Improvements in or relating to the manufacture of dyes

Country Status (1)

Country Link
GB (1) GB369236A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741250C (en) * 1933-03-06 1943-11-08 Kodak Ag Process for the preparation of oxocarbocyanine dyes substituted in the meso position
US2980671A (en) * 1958-04-15 1961-04-18 Gevaert Photo Prod Nv Monomethine cyanine dyes and method for preparing them

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741250C (en) * 1933-03-06 1943-11-08 Kodak Ag Process for the preparation of oxocarbocyanine dyes substituted in the meso position
US2980671A (en) * 1958-04-15 1961-04-18 Gevaert Photo Prod Nv Monomethine cyanine dyes and method for preparing them

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