PHOTOGRAPHIC MATERIAL

1,138,587. Bis-dihydro-triazolethiones. GEVAERT-AGFA N.V. 10 Feb., 1967 [14 Feb., 1966], No. 6332/66. Heading C2C. [Also in Division G2] 5,51 - bis - 1,2,4 - Triazoline - 3 - thiones are disclosed having the formula where R and R 1 is each H, alkyl, aryl, or a heterocyclic radical but at least one o...

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Bibliographic Details
Main Authors ANTOON LEON VANDENBERGHE, JOZEF FRANS WILLEMS
Format Patent
LanguageEnglish
Published 15.04.1969
Subjects
AUXILIARY PROCESSES IN PHOTOGRAPHY
CHEMISTRY
CINEMATOGRAPHY
ELECTROGRAPHY
HETEROCYCLIC COMPOUNDS
HOLOGRAPHY
METALLURGY
ORGANIC CHEMISTRY
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
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Summary:1,138,587. Bis-dihydro-triazolethiones. GEVAERT-AGFA N.V. 10 Feb., 1967 [14 Feb., 1966], No. 6332/66. Heading C2C. [Also in Division G2] 5,51 - bis - 1,2,4 - Triazoline - 3 - thiones are disclosed having the formula where R and R 1 is each H, alkyl, aryl, or a heterocyclic radical but at least one of R and R 1 is H; and A is a chemical bond or an organic bivalent radical. The bivalent radical may be a substituted or unsubstituted alkylene, arylene, aralkylene, cycloalkylene or bivalent heterocyclic radical. The compounds are prepared by boiling 1 mole of a thiosemicarbazide with 0À5 mole of a dicarboxylic acid ester in a sodium methanolate soln. prepared from 11. of methanol and 1 mole of Na. The filtrate of the reaction is acidified with CH 3 COOH and the product ppt. filtered off and recrystallized from H 2 O or EtOH. When unsaturated acid esters are used, the product contains an alkoxy group(s) in A which depends on the alcoholic medium used. A list of products and their starting esters is given.
Bibliography:Application Number: USD3438777