Photographic element and process

Details Photographic element and process Photographic element and process

C - Chemistry, Metallurgy

07

D

96/23, 260/308,

C07D 249/00 (2006.01) C07D 257/04 (2006.01) G03C 7/305 (2006.01) G03C 7/32 (2006.01)

Patent

CA 1324609

-0- PHOTOGRAPHIC ELEMENT AND PROCESS Abstract Photographic compounds capable of releasing a photographically useful group are more effective in photographic materials when the photographic compounds comprise at least two differing timing groups in sequence between a carrier moiety and the photographically useful group. The two timing groups in sequence enable improved timing and control of release of the photographically useful group. Such a coupler is represented by the formula: Image wherein COUP is a coupler moiety; T1 is a first timing group capable of being released from COUP at the coupling position of COUP by reaction of COUP with oxidized color developer; and T2 is a second timing group capable of being released from T1.

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