GB874204A - Improvements in or relating to triazaindolizine compounds - Google Patents

Improvements in or relating to triazaindolizine compounds

Info

Publication number
GB874204A
GB874204A GB296357A GB296357A GB874204A GB 874204 A GB874204 A GB 874204A GB 296357 A GB296357 A GB 296357A GB 296357 A GB296357 A GB 296357A GB 874204 A GB874204 A GB 874204A
Authority
GB
United Kingdom
Prior art keywords
compounds
hydrogen
formula
aralkyl
alkyl
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
GB296357A
Inventor
Douglas James Fry
Brian Ronald David Whitear
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 GB296357A priority Critical patent/GB874204A/en
Publication of GB874204A publication Critical patent/GB874204A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D487/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
    • C07D487/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
    • C07D487/04Ortho-condensed systems
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00Photosensitive materials
    • G03C1/005Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/34Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Abstract

The invention comprises triazaindolizine compounds of formulae <FORM:0874204/IV (b)/1> or <FORM:0874204/IV (b)/2> or tautomers thereof, where R1 is hydrogen or a mercapto, alkythio or aralkylthio group (but not hydrogen in the second formula), R2 is hydrogen, alkyl, aralkyl, aryl or heterocyclic, R3 is hydrogen, alkyl or aralkyl, or R2 and R3 together make up the residue of an alicyclic or benzene ring. Compounds wherein R1 is mercapto may be prepared by reacting CS2 with a compound of formula <FORM:0874204/IV (b)/3> in the presence of a secondary or tertiary organic base and an alcohol as diluent. Compounds in which R1 is alkylthio or aralkylthio may be obtained by treating the corresponding alkali metal mercaptide with a molecular equivalent of an alkylating or aralkylating agent. Compounds of the first formula in which R1 is hydrogen may be prepared by the catalytic reduction of the corresponding mercapto compound with a Raney nickel catalyst containing adsorbed hydrogen. Compounds of the first formula given above wherein R1 is hydrogen and R2 and R3 together make up the residue of a benzene ring may be prepared by the reaction of formic acid (or, according to the first Provisional Specification, an anhydride of an aliphatic or aromatic carboxylic acid) with a compound of formula <FORM:0874204/IV (b)/4> Compounds of the first formula given above wherein R1 is alkylthio or aralkylthio may be obtained by heating to a temperature above its melting point a compound of formula <FORM:0874204/IV (b)/5> where R4 is alkyl or aralkyl; these compounds, when boiled in glacial acetic acid, yield compounds of the first formula given above (R1 being alkylthio or aralkylthio). According to the first Provisional Specification, when R2 and R3 together make up a benzene residue, R1 may also be alkyl, aralkyl or aryl; these values for R1 do not appear in the Complete Specification; these compounds may be prepared by reacting 2-hydrazino-4-hydroxyquinoazoline with formic acid or an anhydride of an aliphatic or aromatic carboxylic acid; and an additional example is given. The triethylamine salt of 2-(4-methyl-6-hydroxy-2-pyrimidyl)-dithiocarbazinic acid is obtained as a by-product when reacting 4-methyl-6-hydroxy-2-pyrimidylhydrazine with CS2, methanol and triethylamine. It is methylated with methyl iodide to yield 4-methyl-6-hydroxy-2[bis(methylthio)methylene hydrazino] -pyrimidine. The compounds of the invention are used in photographic silver halide emulsions (see Group XX). Specifications 851,815 and 851,816 are referred to.
GB296357A 1957-01-28 1957-01-28 Improvements in or relating to triazaindolizine compounds Expired GB874204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB296357A GB874204A (en) 1957-01-28 1957-01-28 Improvements in or relating to triazaindolizine compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB296357A GB874204A (en) 1957-01-28 1957-01-28 Improvements in or relating to triazaindolizine compounds

Publications (1)

Publication Number Publication Date
GB874204A true GB874204A (en) 1961-08-02

Family

ID=9749327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB296357A Expired GB874204A (en) 1957-01-28 1957-01-28 Improvements in or relating to triazaindolizine compounds

Country Status (1)

Country Link
GB (1) GB874204A (en)

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