Silver halide photographic materials

Details Silver halide photographic materials Silver halide photographic materials

1986-10-30

1988-11-08

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Thermographic process

Heat applied after imaging

430203, 430223, 430446, 430543, 430559, 430562, 430564, 430566, 430598, 430551, 430613, 430542, 430606, 430617, 430623, 430631, 430955, 430956, 430957, 430958, 430959, G03C 554, G03C 726, G03C 106, G03C 134

Patent

active

047833963

ABSTRACT:
The present invention provides silver halide photographic materials containing a havel compound, which when reduced, releases a photographically useful group as triggered off by the cleavage of the nitrogen-oxygen single bond in the compound and which is represented by the following general formula (I): ##STR1## wherein EAG represents a group which accepts an electron from a reducing substance; N and O each represents nitrogen atom and an oxygen atom, respectively; R.sup.1 and R.sup.2 each represents a substituent other than a hydrogen atom, and when R.sup.1 or R.sup.2 is bonded to --(Time).sub.t PUG, R.sup.1 or R.sup.2 is a mere bond or a substituent other than a hydrogen atom, and R.sup.1 and R.sup.2 may be bonded to each other to form a ring; Time represents a group for releasing PUG via the subsequent reaction as triggered off by the cleavage of the nitrogen-oxygen single bond in the compound of general formula (I); PUG represents a photographically useful group; t is an integer of 0 or 1; the full lines in the formula each means a bond; and the dotted lines therein mean that at least one of the dotted lines is a bond.
In particular, compounds of the following formula (II) and (III) are preferred among those of the formula (I): ##STR2## wherein R.sup.3 is bonded to the nitrogen atom or oxygen atom in the formula, and represents an atomic group necessary for the formation of a 3 to 8-membered mono- or fused-hetero ring; ##STR3## wherein R.sup.4 and R.sup.5 each represents a mere bond, a hydrogen atom or a substituent group, and they may be bonded to each other to form a saturated or unsaturated carbon ring or hetero ring; and X represents a divalent binding group.

REFERENCES:
patent: 3980479 (1976-09-01), Fields et al.
patent: 4139379 (1979-02-01), Chasman et al.
patent: 4199354 (1980-04-01), Hinshaw
patent: 4199355 (1980-04-01), Hinshaw et al.
patent: 4232107 (1980-11-01), Janssens
patent: 4248962 (1981-02-01), Lau
patent: 4343893 (1982-08-01), Donald et al.
patent: 4369243 (1983-01-01), Credner et al.
patent: 4450223 (1984-05-01), Poucke et al.

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