Patent ID: 6924091

Claim:
A silver halide photographic lightsensitive material comprising a support having thereon at least one lightsensitive silver halide emulsion layer, wherein the lightsensitive material contains at least one compound represented by formula (I) and at least one photographically useful group-releasing compound represented by formula (II) or (III) that is capable of forming a compound having substantially no contribution to a dye after its coupling with an oxidized form of a developing agent: (X) k —(L) m —(A—B) n (I) wherein X represents an adsorbing group to silver halide or a light-absorbing group having at least one atom selected from the group consisting of N, S, P, Se and Te; L represents a bivalent linking group having at least one atom selected from the group consisting of C, N, S and O; A represents an electron-donating group; B represents a leaving group or a hydrogen atom, wherein after —(A—B) n portion is oxidized, B is eliminated or deprotonated thereby to form a radical A.; k and m independently represent an integer of 0 to 3; and n represents 1 or 2; COUP1—D1 (II) wherein COUP1 represents a coupler residue capable of releasing D1 by a coupling reaction with an oxidized form of a developing agent, along with forming a water-soluble or alkali-soluble compound; and D1 represents a photographically useful group or its precursor which is bonded to the coupling position of COUP1; COUP2—C—E—D2 (III) wherein COUP2 represents a coupler residue capable of coupling with an oxidized form of a developing agent; E represents an electrophilic portion; C represents a single bond or a bivalent linking group capable of releasing D2, along with a 4- to 8-membered ring formation, through an intramolecular nucleophilic substitution reaction between the electrophilic portion E and a nitrogen atom, wherein the nitrogen atom originates from the developing agent and is bonded to the coupling position in a coupling product between COUP2 and the oxidized form of the developing agent, and wherein C may be bonded to COUP2 at the coupling position of COUP2 or may be bonded to COUP2 at a position other than the coupling position of COUP2; and D2 represents a photographically useful group or its precursor.