Photographic products and processes

Details Photographic products and processes Photographic products and processes

1984-07-23

1986-05-27

Hoke, Veronica P.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548200, 548201, C07D27704

Patent

active

045916284

ABSTRACT:
This invention relates to photographic processes and products for forming an image in dye from a colorless precursor of a preformed image dye which is substituted with a moiety comprising a 1,3-sulfur-nitrogen group, said 1,3-sulfur-nitrogen group (a) being capable of undergoing cleavage in the presence of silver ion and/or soluble silver complex, and (b) possessing an amide substituent on the carbon atom in the 2-position that undergoes an intramolecularly accelerated cleavage reaction following the cleavage of said 1,3-sulfur-nitrogen group, which moiety maintains said precursor in its colorless form at least until the 1,3-sulfur-nitrogen group undergoes said cleavage. In a further embodiment, the cleavage of the amide substituent following the cleavage of the 1,3-sulfur-nitrogen group is used to provide an imagewise distribution of a photographically useful reagent, which reagent may be, for example, a photographically active reagent.

REFERENCES:
patent: 3719488 (1973-03-01), Locatelli et al.
patent: 3719489 (1973-03-01), Cieciuch et al.
patent: 4098783 (1978-07-01), Cieciuch et al.
patent: 4248962 (1981-02-01), Lau
patent: 4358525 (1982-11-01), Mooberry et al.
patent: 4443941 (1969-05-01), Rogers
patent: 4468448 (1984-08-01), Rogers

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