GB677264A - Improvements in and relating to stabilisers for photographic emulsions - Google Patents

Improvements in and relating to stabilisers for photographic emulsions

Info

Publication number
GB677264A
GB677264A GB2748549A GB2748549A GB677264A GB 677264 A GB677264 A GB 677264A GB 2748549 A GB2748549 A GB 2748549A GB 2748549 A GB2748549 A GB 2748549A GB 677264 A GB677264 A GB 677264A
Authority
GB
United Kingdom
Prior art keywords
bis
diazaindolizine
dihydroxy
methylene
hydroxy
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
GB2748549A
Inventor
Arthur Henri De Cat
Andre Emile Van Dormael
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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 Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Priority to GB2748549A priority Critical patent/GB677264A/en
Publication of GB677264A publication Critical patent/GB677264A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/305—Additives other than developers

Landscapes

  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

<FORM:0677264/IV (b)/1> Compounds of the general formula of Fig. 1, wherein D represents the atoms to complete an iminazole, iminazoline, aryleneiminazole, or triazole nucleus, R1 is OH, R2 is OH, substituted or unsubstituted alkyl, and X is a chemical bond or an aliphatic chain, which may be interrupted by aromatic rings or hetero atoms and when X represents CH2, the two groups, R2 may represent a single chemical bond, are prepared by condensing a compound of the formula of Fig. 2 with a compound of the formula of Fig. 3, wherein R3 is carbalkoxy and R4 is COR2, or when X is CH2, the two R4 groups may be -CO-CO-. 6 : 61 - Methylene - bis - 5 : 7 - dihydroxy-1 : 2 - benz - 3 : 4 - diazaindolizine is prepared by heating together 1 : 3-propanetetracarboxylic acid tetraethyl ester and 2-aminobenziminazole. 6 : 61 - Methylene - bis - 5 - methyl - 7-hydroxy - 1 : 3 : 4 - triazaindolizine, 6 : 61-ethylene - bis - 5 - methyl - 7 - hydroxy - 1 : 3 : 4-triazaindolizine, 6 : 61 - methylene - bis - 5 : 7-dihydroxy - 1 : 2 - chlorobenz - 3 : 4 - diazaindolizine, 6 : 61 - ethylene - bis - 5 - methyl-7 - hydroxy - 1 : 2 - benz - 3 : 4 - diazaindolizine, 6 : 61 - bis - 4 : 7 - dihydroxy - 1 : 2 - benz-3 : 4 - diazaindolizine, 6 : 61 - bis - 5 : 7 - dihydroxy - 1 : 3 : 4 - triazaindolizine, 6 : 61 - mxylylene - bis - 5 - methyl - 7 - hydroxy - 1 : 2-benz - 3 : 4 - diazaindolizine, 6 : 61 - methylene-bis - 5 - methyl - 7 - hydroxy - 1 - 2 - benz - 3 : 4-diazaindolizine, 6 : 61 - methylene - bis - 5 : 7-dihydroxy - 1 : 2 - (11 : 21 - naphtha) - 3 : 4-diazaindolizine, 1 : 5 - di - (5 : 7 - dihydroxy-1 : 2 - benz - 3 : 4 - diazaindolizinyl) - diethyl ether, the compound of Fig. 15, 6 : 61-methylene-bis - 5 : 7 - dihydroxy - 1 : 2 - dihydro - 3 : 4-diazaindolizine, 6 : 61 - ethylene - bis - 6-methyl - 7 - hydroxy - 1 : 2 - diphenyl - 3 : 4-diazaindolizine, and 6 : 61 - methylene - bis-2 - phenyl - 5 - methyl - 7 - hydroxy - 1 : 3 : 4-triazaindolizine are similarly prepared. 4 : 5 - Diphenyl - 2 - aminoiminazole is prepared by coupling 4 : 5-diphenyliminazole with diazotized sulphanilic acid and reducing the azo dye obtained.
GB2748549A 1949-10-26 1949-10-26 Improvements in and relating to stabilisers for photographic emulsions Expired GB677264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2748549A GB677264A (en) 1949-10-26 1949-10-26 Improvements in and relating to stabilisers for photographic emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2748549A GB677264A (en) 1949-10-26 1949-10-26 Improvements in and relating to stabilisers for photographic emulsions

Publications (1)

Publication Number Publication Date
GB677264A true GB677264A (en) 1952-08-13

Family

ID=10260354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2748549A Expired GB677264A (en) 1949-10-26 1949-10-26 Improvements in and relating to stabilisers for photographic emulsions

Country Status (1)

Country Link
GB (1) GB677264A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038081A (en) * 1975-02-28 1977-07-26 Konishiroku Photo Industry Co., Ltd. Development method
US4095982A (en) * 1975-10-24 1978-06-20 Fuji Photo Film Co., Ltd. Method of developing a silver halide photographic light-sensitive material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038081A (en) * 1975-02-28 1977-07-26 Konishiroku Photo Industry Co., Ltd. Development method
US4095982A (en) * 1975-10-24 1978-06-20 Fuji Photo Film Co., Ltd. Method of developing a silver halide photographic light-sensitive material

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