43489-04-9Relevant academic research and scientific papers
Aminoethanethiol and thiazolidine compounds
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, (2008/06/13)
There are disclosed certain aminoethanethiols, and salts thereof, and certain thiazolidines which are made therefrom. The compounds are useful as intermediates in the synthesis of photographic image dye-providing materials.
Photographic products and processes
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, (2008/06/13)
Photographic products and processes for the imagewise generation of a dye from a color shifted dye precursor of a preformed image dye, said precursor having at least one STR1 group, wherein R is hydrogen, alkyl, provided that the α-carbon does not have a hydrogen atom attached thereto, aryl such as phenyl or substituted phenyl, e.g. p-nitrophenyl, or heterocyclic such as pyridine; R1 -R6 are hydrogen, alkyl, preferably having from 1 to 6 carbon atoms, or aryl; n is 0 or 1; and T is a moiety containing a thiazolidin-2-yl group which upon silver-assisted cleavage of said thiazolidin-2-yl group results in the formation of a STR2 group, which may be protonated under the reaction conditions, followed by cleavage of said STR3 which cleavage is anchimerically assisted or accelerated by said STR4 to provide after protonation, an STR5 group in a dye chromophore. In a preferred embodiment the precursor is a substantially colorless compound.
