TETRA HYDRO PYRINIDINE - 2,4 DIONES

There are described novel compounds which are represented by the formulawherein R is -CH2-A- or -CH2- = A; A is sulfur or selenium; X represents the nonmetallic atoms necessary to form a nucleus which completes a five or six membered heterocyclic moiety; R, is H or lower alkyl; R2 is H or a hydrolyz...

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Bibliographische Detailangaben
Hauptverfasser:	ANTHONY J. PUTTICK, JAMES R. BARTELS-KEITH
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	There are described novel compounds which are represented by the formulawherein R is -CH2-A- or -CH2- = A; A is sulfur or selenium; X represents the nonmetallic atoms necessary to form a nucleus which completes a five or six membered heterocyclic moiety; R, is H or lower alkyl; R2 is H or a hydrolyzable group; and R3 is H, alkyl or a hydrolyzable group. The compounds are useful in photographic applications and provide controlled release of a photographically useful material during processing of photographic elements with an aqueous alkaline processing composition.