C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
260/312, 96/38,
C09B 29/00 (2006.01) C07C 45/46 (2006.01) C07C 45/64 (2006.01) C07C 46/00 (2006.01) C07C 46/06 (2006.01) C07C 49/825 (2006.01) C07C 49/83 (2006.01) C07C 50/38 (2006.01) C07C 66/00 (2006.01) C07D 257/04 (2006.01) G03C 1/10 (2006.01) G03C 8/22 (2006.01)
Patent
CA 1159451
Abstract A photographic material for diffusion transfer photo- graphy containing a quinonoid compound, which is capable in reduced state and under alkaline conditions of releas- ing a photographically useful group and corresponds to one of the following general formulae : Image (A) Image (B) wherein : each of (Nuox)1 and (Nuox)2 (same or different) repre- sents an oxidized nucleophilic group, Z represents a bivalent atom or bivalent atomic group, which is electro-negative, Q together with the group Z represents a releasable photographically useful group, Y1 and Y2 together represent the necessary atoms to close a p-quinonoid ring substituted with (a) directly linked monavalent organic ring or ring system substituent(s) having aromatic character, Y3 represents the necessary atoms to close a o-quinonoid ring substituted with (a) directly linked monovalent organic ring or ring system substituent(s) having aromatic character, and each of R1 and R2 (same or different) represents hydrogen or a (substituted) hydrocarbon group, and at least one of R1, R2 and a substituent on the quinonoid ring being or carrying a ballasting group.
374433
Janssens Wilhelmus
Lassig Wolfgang
Meier Ernst
Van de Sande Christian C.
Agfa-Geveart Naamloze Vennootschap
Borden Ladner Gervais Llp
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