GB675656A - Improvements in and relating to the manufacture of light sensitive photographic emulsions - Google Patents

Improvements in and relating to the manufacture of light sensitive photographic emulsions

Info

Publication number
GB675656A
GB675656A GB602748A GB602748A GB675656A GB 675656 A GB675656 A GB 675656A GB 602748 A GB602748 A GB 602748A GB 602748 A GB602748 A GB 602748A GB 675656 A GB675656 A GB 675656A
Authority
GB
United Kingdom
Prior art keywords
methyl
prepared
naphthyl
refluxing
acetic acid
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
GB602748A
Inventor
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 GB602748A priority Critical patent/GB675656A/en
Publication of GB675656A publication Critical patent/GB675656A/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
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/10—Organic substances
    • G03C1/12—Methine and polymethine dyes

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

2 : 21 - Dinitro - 4 : 41 - di - p - tolyldiphenyl disulphide is prepared by heating 4-methyl-31-nitro-41-bromodiphenyl, sodium sulphide, and sulphur in alcohol. 2 - Methyl - 5 - p - tolylbenzthiazole is prepared by refluxing the zinc salt of 2-amino-4-p-tolylthiophenol (obtained by reducing 2 : 21-dinitro - 4 : 41 - p - tolyl - diphenyl disulphide in acetic acid with zinc and HCl) with acetic acid and acetic anhydride. 2 - Benzoylmethylene - 3 - methyl - 5 - p - tolyldihydrobenzthiazole is prepared by reacting 2-methyl - 5 - p - tolylbenzthiazole dimethylsulphate with benzoyl chloride in pyridine. 2 - Thiobenzoylmethylene - 3 - methyl - 5 - p-tolyldihydrobenzthiazole is prepared by treating 2 - benzoylmethylene - 3 - methyl - 5 - p - tolyldihydrobenzthiazole with phosphorus pentasulphide in chloroform. 2 - (b - Methylmercapto : b - phenylvinyl) - 5-p-tolylbenzthiazole dimethylsulphate is prepared by refluxing 2-thiobenzoylmethylene-3-methyl-5-p-tolyldihydrobenzthiazole with dimethyl sulphate in benzene. 4 - Methyl - 31 - nitro - 41 - acetylaminodiphenyl is prepared by nitrating 4-methyl-41-acetylaminodiphenyl in acetic acid, and 4-methyl - 31 - nitro - 41 - aminodiphenyl is prepared therefrom by hydrolysing with aqueous KOH. 4 - Methyl - 31 - nitro - 41 - bromodiphenyl is prepared by diazotizing 4-methyl-31-nitro-4-aminodiphenyl and treating with cupric bromide in aqueous HBr. p - (1 - Naphthyl) - aniline hydrochloride is prepared by reducing 1-(4-nitrophenyl)-naphthalene in acetic acid with acidified stannous chloride. 6-(1 - Naphthyl) - phenylene - thiaz - thionium chloride is prepared by adding p-(1-naphthyl)-aniline hydrochloride to sulphur-monochloride and stirring, adding dry benzene, and refluxing. On stirring the product with water, 6-(1-naphthyl) - phenylenethiaz - thionium hydrate is obtained. 2 - Amino - 5 - (1 - naphthyl) - thiophenol (zinc salt) is prepared by adding aqueous NaOH to an aqueous suspension of 6-(1-naphthyl)-phenylenethiazthionium hydrate, filtering, and adding zinc chloride. 2 - Methyl - 6 - (1 - naphthyl) - benzthiazole is prepared by refluxing together the zinc salt of 2-amino-5-(1-naphthyl)-thiophenol, acetic acid, and acetic anhydride, distilling off the acetic acid in vacuo, and treating with NaOH. Specification 675,654 is referred to.ALSO:3 : 31 - Diethyl - 6 : 61 - di - a - naphthylthiacarbocyanine iodide is prepared by refluxing together 2 - methyl - 6 - a - naphthylbenzthiazole etho-p-toluenesulphonate and ethyl orthoformate in pyridine, and treating with aqueous KI solution. A complex merocyanine dye is prepared by heating 3 - allyl - 5 - [(3 - methyl - 5 - p - tolylbenzthiazolylidene) - a - phenylethylidene] - rhodanine with methyl p-toluenesulphonate and refluxing the product with 2-methyl-4 : 5-diphenylthiazole ethiodide in pyridine containing triethylamine. 3 - Allyl - 5 - [(3 - methyl - 5 - p - tolylbenzthiazolylidene) - a - phenylethylidene] - rhodanine is prepared by refluxing together 2-(b -methylmercapto : b - phenylvinyl) - 5 - p - tolylbenzthiazole dimethylsulphate and N-allylrhodanine. Specification 675,654 is referred to.
GB602748A 1948-10-15 1948-10-15 Improvements in and relating to the manufacture of light sensitive photographic emulsions Expired GB675656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB602748A GB675656A (en) 1948-10-15 1948-10-15 Improvements in and relating to the manufacture of light sensitive photographic emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB602748A GB675656A (en) 1948-10-15 1948-10-15 Improvements in and relating to the manufacture of light sensitive photographic emulsions

Publications (1)

Publication Number Publication Date
GB675656A true GB675656A (en) 1952-07-16

Family

ID=9807080

Family Applications (1)

Application Number Title Priority Date Filing Date
GB602748A Expired GB675656A (en) 1948-10-15 1948-10-15 Improvements in and relating to the manufacture of light sensitive photographic emulsions

Country Status (1)

Country Link
GB (1) GB675656A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933390A (en) * 1955-10-12 1960-04-19 Eastman Kodak Co Supersensitization of photographic silver halide emulsions
US2945762A (en) * 1955-10-12 1960-07-19 Eastman Kodak Co Supersensitization of photographic emulsions using triazines
US2950196A (en) * 1955-10-12 1960-08-23 Eastman Kodak Co Supersensitization of photographic emulsions using triazines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933390A (en) * 1955-10-12 1960-04-19 Eastman Kodak Co Supersensitization of photographic silver halide emulsions
US2945762A (en) * 1955-10-12 1960-07-19 Eastman Kodak Co Supersensitization of photographic emulsions using triazines
US2950196A (en) * 1955-10-12 1960-08-23 Eastman Kodak Co Supersensitization of photographic emulsions using triazines

Similar Documents

Publication Publication Date Title
GB517272A (en) The preparation of new therapeutically useful heterocyclic compounds
GB667206A (en) Improvements in photographic processes and materials therefor
SE7705258L (en) KIT FOR PREPARATION OF ETHIC ACID DERIVATIVES
GB675656A (en) Improvements in and relating to the manufacture of light sensitive photographic emulsions
Duffin et al. 74. Anhydro-compounds from nitrogen-containing derivatives of thioglycollic acid. Part II. Glyoxaline and benziminazole compounds
US4539408A (en) Process for the preparation of sulphoalkyl quaternary salts
JPH0720950B2 (en) Thiofene derivative
Teppema et al. Researches on thiazoles. II. The nitration and reduction of 2-mercaptobenzothiazole and its substituted derivatives
GB691815A (en) Improvements in or relating to photographic development
GB643681A (en) Improvements in or relating to dyestuffs and pigments derived from thiazolyl-2 thioglycollic acids
US3380990A (en) Thiazolyl azo dyestuffs
GB1002886A (en) Preparation of 2-amino-5-bromo-thiazoles and their use in heat sensitive copying layers
GB1459336A (en) Cyanine and merocyanine dyes
GB586544A (en) Manufacture of cyano sulphones
US3981883A (en) Manufacture of 3-amino-2,1-benzisothiazoles
Gregg et al. Triphenylmethyl aryl sulfides. II. Oxidation with bromine in aqueous acetic acid
GB604600A (en) Alicyclicdioxybenzthiazole (and selenazole) carbocyanine dyestuffs and a process of preparing the same
GB681915A (en) Improvements in or relating to the production of colour photographic images
GB658560A (en) Process for the preparation of pyrrocolinocarbocyanine dyes
GB1246114A (en) Benzoylacetamide derivatives and their use as colour couplers
GB410088A (en) Improvements in or relating to methods for the preparation of substituted thiazoles or selenazoles
GB696692A (en) New quinazoline derivatives
SU451238A3 (en) Method for producing acylaminoalkylbenzene sulphomoureas
GB747628A (en) New colour formers for use in colour photography
GB669585A (en) Process for the manufacture of 2-amino-4-methyl-pyrimidine and n-alkyl and n-aryl derivatives thereof