PURPOSE: To enable a photograplxically useful group to be released and to enhance image acutance by incorporating a compound having a specified coupling-off group at a coupling site.
CONSTITUTION: The photographic sensitive material contains the coupling-off group to be allowed to release the photographically useful group by an intramolecular nucleophilic substitution reaction at the coupling site, preferably, containing a coupler and this coupling-off group is represented by formula I in which Q is an N atom or a C-R1 group; R1 is an H atom or a 1-20 C straight or branched alkyl group, such as a methyl, ethyl, or propyl group or an aryl group, such as a phenyl or chlorophenyl group; PUG is the photographically useful group; and Z is an atomic group necessary to complete a nonaromatic hetero ring, such as a 4-, 5-, or 6-membered hetero ring or the like, thus permitting not only the photographically useful group to be released but also the acutance of an image formed by processing the photographic material to be enhanced.
MAIKERU JIYON KAAMODEI
JIYON MAIKERU BUKIYANAN
