Silver halide photosensitive material containing a compound capable of releasing a photographically useful group

A silver halide photosensitive material comprising a support and at least one silver halide emulsion layer, wherein said emulsion layer or another layer contains a compound represented by formula (I) ##STR44## wherein X represents an atomic group forming a redox center of the benzene type having substituents by linking with C.sub.A and C.sub.B, and which does not enable Time-PUG to be released until the redox center is oxidized by an oxidizing compound formed in the exposed areas during development processing;

• EWG represents an electron withdrawing group having a Hammet's .sigma. para value exceeding 0.3 selected from the group consisting of a cyano group, a nitro group, substituted or unsubstituted carbamoyl groups having from 1 to 30 carbon atoms, substituted or unsubstituted sulfamoyl groups having from 1 to 30 carbon atoms, substituted or unsubstituted alkoxycarbonyl group having from 1 to 30 carbon atoms, substituted or unsubstituted sulfonyl groups having from 1 to 30 carbon atoms, or substituted or unsubstituted acyl groups having 1 to 30 carbon atoms;
• C.sub.A and C.sub.B each represents a carbon atom;
• R.sub.1 and R.sub.2 each represents a hydrogen atom or a suitable substituent;
• Time represents a timing group connecting to C.sub.B through a sulfur, nitrogen, or selenium atom thereof, t is an integer of 0 to 1, and when t=0, Time is a chemical bond;
• PUG represents a photographically useful group and connects to C.sub.B through a sulfur, nitrogen, or selenium atom thereof when t=0;
• and n is an integer of 0 or 1.