(57) Photographic couplers comprise a naphtholic coupler moiety capable of forming a red
or infrared absorbing dye upon oxidative coupling and comprising (i) an optional coupling-off
group in the coupling position, (ii) a group, in the position ortho to the hydroxy
group, which is represented by the formula:
--R wherein R is a substituent which enables the dye formed upon oxidative coupling
to absorb in the red or infrared region of the spectrum without undesired dye instability,
and (iii) a group Y in the 5-position of the naphtholic coupler moiety which is capable
of promoting red or infrared dye formation, the group Y having sufficient bulk to
provide a bathochromic shift in the absorption of the resulting red or infrared dye.
These couplers are useful in photographic materials and processes enabling formation
or red and infrared absorbing dyes.
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