Konica Corporation

Katsuji Ota

Satoru Ikesu

Kazuhiko Kimura

Takatugu Suzuki

Shinri Tanaka

Noriko Ueda

Michiko Nagato

Tomio Horiuchi

Takayuki Suzuki

Ryuzou Watanabe

A silver halide light sensitive color photographic material is disclosed, comprising a support having thereon a silver halide emulsion layer, the photographic material further comprising a 2-equivalent yellow coupler exhibiting superior dye forming capability and enhanced solubility in a solvent, and represented by the following formula:

Silver halide light sensitive color photographic material

A synthesizing method for a 3-substituted-3-oxo-2-(2,4 -oxazolidinedione-3-yl)propionic acid amide compound represented by the following Formula &lsqb;I&rsqb;, by reacting a compound represented by the following Formula &lsqb;II&rsqb; with a compound represented by the following Formula &lsqb;III&rsqb;, in the presence of an organic base;

Synthesizing method for a 3-substituted-3-oxo-2-(2,4-oxazolidinedione-3-yl) propionic acid amide compound

Silver halide color photographic light-sensitive material

A silver halide color photographic light-sensitive material characterized in that the light-sensitive material contains a yellow coupler represented by the following Formula [I]; ##STR1## wherein R.sub.1 represents an alkyl group, a cycloalkyl group, an amino group, a heterocyclic group or an aryl group, R.sup.2 represents a straight chain or branched unsubstituted alkyl group having not less than 2 carbon atoms, X represents a chlorine atom, an alkoxy group or aryloxy group. Y represents an acylamino group or a chlorine atom when R.sub.1 represents an alkyl group, a cycloalkyl group, an amino group or a heterocyclic group , and Y represents an sulfonylamino group, a chlorine atom or oxycarbonyl group when R.sub.1 represents an aryl group. n represents an integer of 0 to 4. When n is not less than 2, plural Y may be either the same or different.

Silver halide color photographic light-sensitive material containing a

A silver halide color photographic light-sensitive materail is disclosed. The light-sensitive material comprises a support having thereon a blue-sinsitive silver halide emulsion layer containing a yellow dye-forming coupler represneted by the following Formula I; ##STR1## wherein R.sub.1 is an aliphatic group or an aromatic group, R.sub.2 is an anti-diffusion aliphatic group or aromatic group, R.sub.3 is a hydrogen atom or a halogen atom, and X is a 5- or 6-member nitrogen-containing heterocyclic group capable of being released upon couling reaction with the oxidation product of a color developing agent.

A method of manufacturing a sulfide comprises the steps of (a) dissolving a thiol in a solvent to form a solution; (b) oxidizing the thiol to a disulfide in the presence of a first oxidizing agent in the solution; (c) reacting the disulfide with a coupler in the presence of a base and a second oxidizing agent, without isolation of said disulfide from the solution, to form a reaction mixture in which the sulfide is produced; and (d) obtaining said sulfide.

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Hino, Japan

Katsuji Ota