Photographic products and processes

Details Photographic products and processes Photographic products and processes

C - Chemistry, Metallurgy

07

D

96/36, 260/310.1

C07D 277/04 (2006.01) C07D 277/06 (2006.01) G03C 1/40 (2006.01) G03C 8/04 (2006.01) G03C 8/08 (2006.01)

Patent

CA 1222762

3356-1542 ABSTRACT OF THE DISCLOSURE This invention relates to photographic processes and products for forming an image in dye from a colorless precur- sor of a preformed image dye which is substituted with a moiety containing a thiazolidinyl group, said thiazolidinyl group (a) being capable of undergoing cleavage imagewise in the presence of an imagewise distribution of silver ion and/or soluble silver complex and (b) possessing a substituent on the carbon atom in the 2-position which upon cleavage of said thiazolidinyl group, undergoes a .beta.-elimination reaction followed by an intramolecularly accelerated nucleophilic displacement reaction, which moiety maintains the precursor in its colorless form at least until said thiazolidinyl group undergoes said cleavage. In a further embodiment, this sequence of reactions is used to release an imagewise distribution of a photographically useful reagent which reagent may be, for example, a photographically active reagent. A typical compound containing a thiazolidinyl group used herein is the compound: Image

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