Eastman-kodak Company

Arch Chemicals, Inc.

Nohms Technologies, Inc.

David A Steele

Jerrold N Poslusny

Paul B Merkel

Ronald E Leone

David T Southby

Thomas R Welter

Drake M Michno

Melvin M Kestner

Teh-Hsuan Chen

Norma B Platt

Philip A Allway

Richard P Szajewski

William J Begley

Wojciech K Slusarek

Paul L Zengerle

Rahim Hani

Surya S Moganty

Paul A Burns

Gabriel Torres

David S Ross

John Sinicropi

John Joseph Jardas

Yue Wu

Gregory J Lestina

Rutvik Vaidya

Richard K Rothrock

The present disclosure is directed to a phosphorus-modified ionic liquid compound, the synthesis thereof and an electrochemical cell electrolyte containing the cyclic phosphorus-modified ionic liquid compound.

Modified ionic liquids containing cyclic phosphorus moiety

Disclosed herein is a cost effective and environmentally friendly process to prepare 1-hydroxy-6-substituted pyridones from 2,6-dichloropyridine. The process includes the steps of (a) reacting 2,6-dichloropyridine with hydrogen peroxide in the presence of trifluoroacetic acid at a first temperature to produce a first intermediate containing (1) trifluoroacetic acid and (2) 2,6-dichloropyridine N-oxide and/or salts thereof; (b) adding sulfuric acid to the first intermediate to provide a second intermediate; (c) removing trifluoroacetic acid from the second intermediate to provide a composition containing 2,6-dichloropyridine N-oxide and/or salts thereof which is essentially free of trifluoroacetic acid; (d) reacting 2,6-dichloropyridine N-oxide and/or salts thereof from step (c) with RXH and a base wherein each R is independently a substituted or unsubstituted hydrocarbyl group having between 1 and 20 carbon atoms, X is oxygen or sulfur, to produce a corresponding 2,6-disubstituted-pyridine N-oxide; and (e) heating the disubstituted compound thereby producing the 1-hydroxy-6-substituted pyridone.

Process for the preparation of 1-hydroxy-6-substituted pyridones

The invention provides a color negative photographic element comprising a light sensitive silver halide emulsion imaging layer having associated therewith a cyan dye-forming coupler dispersion comprising a first 2-ureido-5-acylamino substituted phenolic cyan dye-forming coupler &lsqb;P&rsqb;, a second phenolic cyan dye-forming coupler &lsqb;AP&rsqb; where the 2-substituent is other than an ureido group, a substantially non-color-developable phenolic activator compound &lsqb;ACT&rsqb;, and a non-phenolic organic coupler solvent having a boiling point of at least 150C; wherein compounds represented by &lsqb;P&rsqb;, &lsqb;AP&rsqb;, and &lsqb;ACT&rsqb; are present in the coupler dispersion in relative weight fractions of from 0.30 to 0.65 for &lsqb;P&rsqb;, from 0.15 to 0.35 for &lsqb;AP&rsqb;, and from 0.15 to 0.35 for &lsqb;ACT&rsqb;, provided the sum of the relative weight fractions for &lsqb;P&rsqb;&plus;&lsqb;AP&rsqb;&plus;&lsqb;ACT&rsqb;&equals;1, and the weight ratio of the non-phenolic coupler solvent in the coupler dispersion is from 0.30 to 2.0 relative to the sum of &lsqb;P&rsqb;&plus;&lsqb;AP&rsqb;&plus;&lsqb;ACT&rsqb;. Photographic elements incorporating the dispersion formulation of this invention provide good activity, a cyan dye of high density and acceptable absorption maximum for color negative films. In addition, partial substitution of less expensive cyan auxiliary phenolic coupler &lsqb;AP&rsqb; and activator &lsqb;ACT&rsqb; for cyan phenolic coupler &lsqb;P&rsqb; advantageously allows cost savings.

Cyan coupler dispersion with increased activity

A photographic element comprises: (a) a support; and (b) at least one silver halide emulsion layer; wherein said emulsion layer contains (c) at least one magenta dye-forming pyrazolone DIR coupler of structure I; and (d) at least one magenta dye-forming imaging coupler of structure II, structure IIIa or structure IIIb, below:

Combinations of purine-releasing pyrazolone DIR couplers and pyrazolone of pyrazolotriazole imaging couplers

This invention comprises a photographic element having a support bearing one or more silver halide emulsions and one or more DIR couplers of structure I or II below:

Photographic element containing a DIR coupler

This invention comprises a photographic element having a support bearing at least one silver halide emulsion and at least one DIR coupler of structure I: ##STR1## wherein: Z is a moiety which can react with oxidized developer to release a coupling-off group;

This invention comprises a photographic element, comprising a support bearing at least one silver halide emulsion and at least one benzoylacetanilide yellow dye-forming DIR coupler of structure I, below: ##STR1## wherein: each R.sub.1 is individually selected from the group consisting of halogen atoms and alkyl and alkoxy groups;

Photographic element containing a benzolylacetanilide DIR coupler

This invention comprises a photographic element, comprising a support bearing at least one silver halide emulsion and at least one acylacetanilide yellow dye-forming DIR coupler of structure I, below: ##STR1## wherein: R.sub.1 is a t-alkyl group or a phenyl group;

Photographic element containing an acylacetanilide DIR coupler

A photographic element comprises a support bearing at least one silver halide emulsion and at least one acylacetanilide yellow dye-forming DIR coupler of structure I, below ##STR1## wherein: the R.sub.1 is a tertiary alkyl group or a phenyl group;

Photographic element containing a yellow DIR coupler

Disclosed is a photographic element comprising a silver halide emulsion layer having associated therewith a 3-indoloylacetanilide yellow dye-forming coupler of structure I, below: ##STR1## wherein: R.sub.1 is an alkyl or phenyl group;

Photographic element containing cylacetamido yellow dye-forming couplers

Disclosed is a photographic element comprises a silver halide emulsion layer having associated therewith a 3-indoloylacetanilide yellow dye-forming coupler of structure I, below: wherein:

Photographic element containing improved acylacetamido yellow

The invention provides a photographic element, comprising a support bearing at least one silver halide emulsion and at least one 3-indoloylacetanilide yellow dye-forming DIR coupler of structure I, below: ##STR1## wherein: R.sub.1 is an alkyl or phenyl group;

Photographic element containing acetamido DIR coupler

A photographic element comprises: (a) a support; and (b) at least one silver halide emulsion layer; wherein said emulsion layer contains (c) at least one magenta dye-forming pyrazolone DIR coupler of structure I; and (d) at least one magenta dye-forming imaging coupler of structure II, structure IIIa or structure IIIb, below: ##STR1## wherein the substituents are as defined in the specification.

Combinations of purine-releasing pyrazolone DIR couplers and pyrazolone

A photographic element, comprises a support bearing one or more silver halide emulsions and one or more pyrazolone magenta dye-forming DIR couplers of structure I or II: wherein:

The invention provides a photographic yellow image dye-forming coupler represented by Formula I: ##STR1## wherein R.sub.1 is a substituent group; TG is a thiophene group; and X is hydrogen or a coupling-off group. The invention also provides a photographic element comprising a silver halide emulsion layer having associated therewith a dye-forming coupler of Formula I, as well as a process for forming an image in such a photographic element.

Growing community of inventors

Webster, NY, United States of America

David A Steele