GB1234054A - - Google Patents

Info

Publication number
GB1234054A
GB1234054A GB1234054DA GB1234054A GB 1234054 A GB1234054 A GB 1234054A GB 1234054D A GB1234054D A GB 1234054DA GB 1234054 A GB1234054 A GB 1234054A
Authority
GB
United Kingdom
Prior art keywords
carboxaldehyde
mixture
methylpyrrole
oct
dichloroethane
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
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 filed Critical
Publication of GB1234054A publication Critical patent/GB1234054A/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
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/485—Direct positive emulsions
    • G03C1/48515—Direct positive emulsions prefogged
    • G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser
    • G03C1/4853—Direct positive emulsions prefogged characterised by the desensitiser polymethine dyes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/10—The polymethine chain containing an even number of >CH- groups
    • C09B23/105—The polymethine chain containing an even number of >CH- groups two >CH- groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Pyrrole Compounds (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

1,234,054. Pyrrole carboxaldehydes. EASTMAN KODAK CO. 3 Oct., 1968 [5 Oct., 1967], No. 46895/68. Heading C2C. [Also in Divisions C4 and G2] 5 - Methylpyrrole - 2 - carboxaldehyde is prepared by adding POCl 3 to cooled N,N- dimethylformamide, adding dichloroethane to the mixture, and after cooling adding a solution of 2-methylpyrrole in dichloroethane. The mixture is then heated at reflux, and after cooling a solution of sodium acetate in water is added, the mixture refluxed and the layers separated. 1 - Phenylpyrrole - 2 - carboxaldehyde and 1,5- diphenylpyrrole - 2 - carboxaldehyde are prepared similarly from the corresponding reactants.
GB1234054D 1967-10-05 1968-10-03 Expired GB1234054A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67300167A 1967-10-05 1967-10-05

Publications (1)

Publication Number Publication Date
GB1234054A true GB1234054A (en) 1971-06-03

Family

ID=24700917

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1234054D Expired GB1234054A (en) 1967-10-05 1968-10-03

Country Status (6)

Country Link
US (1) US3592653A (en)
JP (1) JPS4827928B1 (en)
BE (1) BE721739A (en)
DE (1) DE1800421A1 (en)
FR (1) FR1588289A (en)
GB (1) GB1234054A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2132937A1 (en) * 1971-07-02 1973-01-18 Agfa Gevaert Ag SPECTRALLY SENSITIVIZED DIRECT POSITIVE EMULSION LAYERS
US4006137A (en) * 1975-08-21 1977-02-01 E. R. Squibb & Sons, Inc. 2-Ethenyl imidazolium derivatives
US4839271A (en) * 1987-06-26 1989-06-13 E. I. Du Pont De Nemours And Company Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus
US5004812A (en) * 1987-06-26 1991-04-02 E. I. Du Pont De Nemours And Company Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus
US4927933A (en) * 1987-06-26 1990-05-22 E. I. Du Pont De Nemours And Company Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus
US5008401A (en) * 1990-04-17 1991-04-16 Asahi Chemical Co., Ltd. Cyanine compounds
USRE35044E (en) * 1987-08-07 1995-09-26 Asahi Chemical Co., Ltd. Cyanine compounds
DE68912303T2 (en) * 1988-09-09 1994-06-16 Asahi Chemical Co CYANINE COMPOUNDS.
EP0599383B1 (en) * 1992-11-19 2001-02-28 Eastman Kodak Company Silver halide photographic elements containing furan or pyrrole substituted dye compounds
JP3588160B2 (en) * 1994-05-18 2004-11-10 イーストマン コダック カンパニー Blue sensitizing dye having heterocyclic substituent

Also Published As

Publication number Publication date
US3592653A (en) 1971-07-13
JPS4827928B1 (en) 1973-08-28
DE1800421A1 (en) 1969-07-10
BE721739A (en) 1969-03-14
FR1588289A (en) 1970-04-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees