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Silver halide photographic materials

Assignee: Fujifilm Holdings Corp
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Filing: 1986-10-31
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Granted: —
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Expires: 2006-10-31
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Abstract

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) wherein EAG represents a group which accepts an electron from a reducing substance; N and 0 each represents nitrogen atom and an oxygen atom, respectively; R' and R 2 each represents a substituent other than a hydrogen atom, and when R' or R 2 is bonded to -(Time)̵― t ― PUG, R' or R 2 is a mere bond or a substituent other than a hydrogen atom, and R' and R 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 mean 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): wherein R 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; wherein R 4 and R 5 each represents a mere bond, a hydrogen atm 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.

Inventors

  • 👤 Koki Fuji Photo Film Co. Ltd. Nakamura
  • 👤 Shigeru Fuji Photo Film Co. Ltd. Nakamura

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 11:38
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/40; G03C8/4013; G03C8/4033; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/157; Y10S430/158; Y10S430/159; Y10S430/16

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 165 words
A silver halide photographic material containing a compound of the following general formula (I): 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' and R 2 each represents a substituent other than a hydrogen atom and when R' or R 2 is bonded to -(Time PUG, R 1 or R 2 is a mere bond or a substituent other than a hydrogen atom, and R' and R 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 mean a bond; and the dotted lines therein mean that at least one of the dotted lines is a bond.
Claim 2
Dependent Claim 165 words
A silver halide photographic material containing a compound of the following general formula (I): 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' and R 2 each represents a substituent other than a hydrogen atom and when R' or R 2 is bonded to -(Time PUG, R 1 or R 2 is a mere bond or a substituent other than a hydrogen atom, and R' and R 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 mean a bond; and the dotted lines therein mean that at least one of the dotted lines is a bond.
Claim 3
Dependent Claim 53 words
The silver halide photographic material as claimed in claim 1, wherein the compound of general formula (I) has general formula (II): wherein R 3 is bonded to the nitrogen atom or oxygen atom in formula (II), and is an atomic group necessary for the formation of a 3 to 8-membered mono-or fused-hereto ring.
Claim 4
Dependent Claim 70 words
The silver halide photographic material as claimed in claim 1, where the compound of general formula (1) has general formula (III): wherein R 4 and R 5 each represents a mere bond, a hydrogen atom or a substituent group, and wherever R 4 and R 5 may be bonded to each other to form a saturated or unsaturated carbon ring or hetero ring; and X represents a divalent binding group.
Claim 5
Dependent Claim 137 words
The silver halide photographic material as claimed in claim 1, wherein EAG is a group represented by the following formula (A) or (B): Vn' represents an atomic group for forming a 3 to 8-membered ring together with Z, and Z 2 ; n' is an integer of 3 to 8: meaning the followina: Z 2 to Z, each represents -0-, -S-, or -SO 2- ; Sub represents a mere bond (π-bond) or a hydrogen atom or a substituent, and these Sub's may be the same or different, or they may be bonded to each other to form a 3 to 8-membered, saturated or unsaturated carbon-ring or hetero-ring; n" is an integer of 1 to 6; meaning the following: Y, through Y 6 each represents where Sub' represents a mere bond (o-bond or π-bond) or the same substituents.
Claim 6
Dependent Claim 36 words
The silver halide photographic material as claimed in claim 1, wherein EAG is an aryl group substituted by at least one electron-attracting group, an optionally substituted heterocyclic group or a monovalent residue of a quinone compound.
Claim 7
Dependent Claim 16 words
The silver halide photographic material as claimed in claim 1, wherein PUG is a diffusible dye.
Claim 8
Dependent Claim 16 words
The silver halide photographic material as claimed in claim 1, wherein PUG is a development inhibitor.
Claim 9
Dependent Claim 24 words
The silver halide photographic material as claimed in claim 1, wherein the material further contains a hydrazine derivative and PUG is a hydroxytetrazaindene compound.
Claim 10
Dependent Claim 37 words
The silver halide photographic material as claimed in claim 8, wherein the material is, after exposure, processed with a processing solution containing 0.15 mole/liter or more of sulfite ion and having a pH of 10.0 to 12.3.
Claim 11
Dependent Claim 18 words
The silver halide photographic material as claimed in claim 1, wherein the material further contains a reducing substance.
Claim 12
Dependent Claim 22 words
The silver halide photographic material as claimed in claim 10, wherein the reducing substance is an organic compound to follow Kendal-Pelz formula.
Claim 13
Dependent Claim 33 words
A method for the formation of photographic images, wherein the silver halide photographic material as claimed in claim 10 is developed by heating after imagewise exposure thereof or simultaneously with imagewise exposure thereof.

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