GB651124A - N-substituted isoalloxazines as catalysts in the dye bleach baths for color photography - Google Patents

N-substituted isoalloxazines as catalysts in the dye bleach baths for color photography

Info

Publication number
GB651124A
GB651124A GB32325/48A GB3232548A GB651124A GB 651124 A GB651124 A GB 651124A GB 32325/48 A GB32325/48 A GB 32325/48A GB 3232548 A GB3232548 A GB 3232548A GB 651124 A GB651124 A GB 651124A
Authority
GB
United Kingdom
Prior art keywords
isoalloxazines
catalysts
substituted
color photography
dye bleach
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
GB32325/48A
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.)
GAF Chemicals Corp
Original Assignee
General Aniline and Film Corp
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 General Aniline and Film Corp filed Critical General Aniline and Film Corp
Publication of GB651124A publication Critical patent/GB651124A/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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

7 : 8 - Methylenedioxy - 10 - methylisoalloxazine is prepared by reacting 4 : 5-methylenedioxy-o-phenylenediamine with alloxan and methylating the product with dimethyl sulphate. 7 : 8 - Isopropylidenedioxy - 10 - methylisoalkoxazine is prepared by reacting 4-methyl-amino-5-aminoisopropylidenedioxybenzene with 5 : 5-dichlorobarbituric acid. 4 - Methylamino - 5 - aminoisopropylidenedioxybenzene is prepared by treating 4-chloro-5-nitroisopropylidenedioxybenzene with methylamine and reducing with hydrogen in presence of palladium oxide.
GB32325/48A 1947-12-30 1948-12-14 N-substituted isoalloxazines as catalysts in the dye bleach baths for color photography Expired GB651124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US794822A US2541884A (en) 1947-12-30 1947-12-30 N-substituted isoalloxazines as catalysts in the dye bleach baths for color photography

Publications (1)

Publication Number Publication Date
GB651124A true GB651124A (en) 1951-03-14

Family

ID=25163781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32325/48A Expired GB651124A (en) 1947-12-30 1948-12-14 N-substituted isoalloxazines as catalysts in the dye bleach baths for color photography

Country Status (6)

Country Link
US (1) US2541884A (en)
BE (1) BE486550A (en)
CH (2) CH280857A (en)
DE (1) DE824884C (en)
FR (1) FR991224A (en)
GB (1) GB651124A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2410025A (en) * 1936-12-14 1946-10-29 Chromogen Inc Production of colored photographic pictures
USRE22308E (en) * 1936-12-14 1943-05-11 Production of colored photographic
BE434413A (en) * 1938-05-17

Also Published As

Publication number Publication date
FR991224A (en) 1951-10-03
BE486550A (en)
CH285165A (en) 1952-08-31
US2541884A (en) 1951-02-13
DE824884C (en) 1951-12-13
CH280857A (en) 1952-02-15

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