C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
96/100, 260/174
C09B 29/00 (2006.01) C09B 43/00 (2006.01) G03C 1/40 (2006.01) G03C 8/22 (2006.01)
Patent
CA 1163991
ABSTRACT OF THE DISCLOSURE Novel non-diffusing reducible compounds of formula I which under alkaline development conditions release a diffusible photographically useful compound are of use in color diffusion transfer processes. Image R° represents the atoms required to complete a ring system comprising at least one aromatic or heteroaromatic ring W represents a group which reduces the electron density in the ring at the position of E and is selected from the group consisting of a halogen atom, a cyano group, a nitro group, a nitroso group. a trifluoromethyl group, a quaternary ammonium group and an acyl group; m represents an integer of from 1 to 3; G represents a group from which R1 can be split off under photographic development conditions; R1 represents the residue of a diffusible photographically active compound X represents an oxygen atom, a sulfur atom or an amino group; R2 represents hydrogen or a group which can be split off in alkaline medium, and E represents a reducible substituent selected from the group consisting of Image R3 represents hydrogen, alkyl, aryl, a heterocyclic group or aralkyl.
375471
Renner Gunter
Wolff Erich
Agfa-Gevaert Aktiengesellschaft
Fetherstonhaugh & Co.
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