Konishiroku Photo Industry Co., Ltd.

Ryosuke Sato

Hiroshi Sugita

Katsunori Kato

Takashi Sasaki

Hidetaka Ninomiya

Mitsuto Fujiwhara

Takaya Endo

Kiyoshi Yamashita

Fumio Ishii

Shoji Kikuchi

Katsumi Matsuura

Yuji Hotta

Kazuhiko Kimura

Shizuo Saito

Teruo Kagami

Kasaku Masuda

There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application. The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.

Silver halide photosensitive materials for color photography

A silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein R.sup.3 is a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, or a monovalent organic group;

A silver halide photographic material containing a cyan coupler represented by the formula: ##STR1## wherein, R.sub.1 is selected from the group consisting of an acylamino group, an alkylsulfonamido group, an arylsulfonamido group, a carbamoyl group, a sulfamoyl group, an alkylureido group, an arylureido group, an alkyl group, an alkoxy group, an amino group, an alkoxycarbonyl group and a arylcarbonyl group, said groups have at least one carboxy group as a substituent, R.sub.2 is selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a nitro group, a cyano group, a formyl group, a carboxyl group, a hydroxyl group, an amino group, an acylamino group, an alkylsulfonamido group, an arylsulfonamido group, an alkylureido group, an arylureido group, a sulfamoyl group, a carbamoyl group, an alkoxycarbonyl group and an aryloxycarbonyl group, R.sub.3 represents an alkyl group substituted with a phenoxy group; R.sub.4 represents a hydrogen atom or an alkyl group, n represents an integer of 1 to 4, provided that when n is 2 or more the groups represented by the plurality of R.sub.2 may be either same or different from each other, and that the total number of carbon atoms contained in the groups represented by R.sub.3 and R.sub.4 is 10 or more.

Silver halide photographic material

A method for synthesizing a magenta coupler. The synthesis is carried out through (1) 3-pyrazoline-5-ones which are obtained by substituting a blocking group at the nitrogen atom in the second position thereof; or (2) pyrazoles which are obtained by substituting a blocking group at the hydroxyl group bonded in the fifth position thereof. The magenta coupler obtained has the formula ##STR1## wherein R.sub.1 is an aryl or heterocyclic group, R.sub.2 is an acylamide, anilino or ureido group, and R3 is an alkyl, aryl, or heterocyclic group.

Method for synthesizing a magenta coupler by selectively etherifying

A method for forming a silver halide color photographic image comprising forming a dye image in the presence of a phenol cyan coupler. The phenol cyan coupler has the following formula: ##STR1## wherein R is an alkyl, an aryl or a heterocyclic group; X is selected from the group consisting of an alkyl, acyloxy, acylamino, succinimide, and sulfoneamide moiety; Z is a hydrogen atom or a group capable of eliminating itself from the coupler during the coupling reaction with the oxidized product of a color developing agent; and n is an integer from 1 to 3, and when n is 2 or 3, X may be the same or different.

Method and material for the formation of silver halide color

A silver halide photographic material containing a coupler capable of releasing a photographically useful group in a controllable timing.

A color photographic material having a light-sensitive silver halide emulsion layer containing a DIR compound having an amino group and a DIR compound having no amino group.

Silver halide color photographic material

The present invention discloses a multi-layer photosensitive material for color photography in which a compound capable of reacting with an oxidation product of a developing agent to release a substance promoting bleaching of developed silver at the bleaching or blixing step after the development treatment is incorporated into at least one layer constituting said photosensitive material.

Photosensitive material for color photography

A diffusible-dye releasing type dye consisting of a radical which reacts with an oxidation product of a color developing principal agent in a color development process to yield a substantially colorless compound and a dye residue carrying water-soluble radicals. Its photographic uses are also disclosed.

Growing community of inventors

Hino, Japan

Ryosuke Sato