Eastman-kodak Company

Robert F Romanet

Susan M Fischer

David Hoke

Joan C Potenza

Paul A Burns

Paul P Spara

David G Lincoln

Stephen P Singer

Chang K Kim

William B Vreeland

John W Harder

Louis Elbert Friedrich

Daniel L Kapp

Sharon E Normandin

Arlyce T Bowne

Teh-Hsuan Chen

Judith A Bose

Ronald R Valente

Francesco DeBellis

Rajiv P Balasubramanian

Frank D Coms

Gary M Russo

Michael W Crawley

Hans G Ling

Rakesh Jain

Christopher T Brown

Scott R Conley

Michael Phillip Youngblood

William R Schleigh

Susan D Hill

Anabisdally I Bodden

Ileana Place

A photographic element comprising a light-sensitive silver halide emulsion layer containing a 1H-pyrazolo[1,5-b][1,2,4]triazole coupler represented by structure (I): wherein

Photographic element containing improved pyrazolotriazole coupler

Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer and, having associated with that layer a 1H-pyrazolo[1,5-b]-1,2,4-triazole dye forming coupler having a fully substituted carbon atom at the 6-position, a chloro group at the 7-position, and, at the 2-position, a phenyl ring substituted in the meta position with a carbonamido substituent containing an &#x3b1;-sulfone moiety. Photographic elements containing these couplers exhibit desirable bleach-fix and activity characteristics.

Photographic material comprising a bicyclic pyrazolotriazole coupler with improved photographic properties

Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer and, having associated with that layer, a 1H-pyrazo&lsqb;1,5-b&rsqb;-1,2,4-triazole dye forming coupler having a fully substituted carbon atom at the 6-position, a chloro group at the 7-position, and, at the 2-position, a propionic ester moiety.

Photographic material comprising a bicyclic pyrazolotriazole coupler with improved hue

Disclosed is a process for forming a 1H-pyrazolo (1,5-b)-&lsqb;1,2,4&rsqb;-triazole compound by ring closing a pyrazoloamidine compound comprising reacting the amidine with an oxidizing agent having a reduction potential vs Ag/AgCl that is more positive than &minus;0.16V and less than &plus;1.43V in the presence of a halogen atom. The invention also discloses certain triazole compounds that are successfully made by the conventional process. The process and compounds of the invention provide improved yields and reduce or eliminate unwanted side-reactions.

Synthesis of certain triazole compounds

Disclosed is a process for forming an N-acylamino pyrazole comprising contacting a N-acyl-3-oxo-imino ether compound either with a salt of hydrazine in the presence of a base or with hydrazine.

Synthesis of 3-acylaminopyrazoles

The invention provides a color photographic element suitable for forming both a colored dye image and a neutral silver-based image, comprising a support bearing at least one light-sensitive silver halide emulsion layer containing a coupler capable of forming a colored dye upon development, and bearing a further light-sensitive silver halide emulsion layer containing a coupler which is capable of releasing a thiovinyl group upon development that is capable of reacting to form a neutral silver-based image.

Color photographic element containing coupler useful for forming neutral silver-based image

Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a bicyclic azole dye-forming coupler compound having Formula I:

Photographic element and compound and process useful therewith

Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a bicyclic azole dye-forming coupler, having appended to a ring carbon at a non-coupling position thereof a substituent group represented by the formula:

Photographic element having improved dye stability, compound, and imaging process

The invention provides a photographic element comprising a light sensitive silver halide emulsion layer having associated therewith a dye-forming coupler having formula I: ##STR1## wherein R.sub.1 is selected from the group consisting of alkyl, aryl, and heterocyclic groups;

Photographic element containing an improved pyrozolotriazole coupler

The invention provides a photographic element comprising a silver halide emulsion layer having associated therewith a dye-forming coupler represented by formula II: wherein

Photographic element having improved magenta dye light stability and

There are described intermediates for the preparation of known pyrazoloazole photographic magenta dye forming couplers and processes for making and using these intermediates. The intermediates are low molecular weight compounds represented by the structure: ##STR1## wherein: R, X, R.sup.1 and Y are defined herein. The process for making these intermediates involves diazotizing a 5-amino-1H-pyrazole to produce a 5-diazo-1H-pyrazole, then condensing the diazotized product with an active methine or methylene compound having a pKa of 14 or less to produce a substituted hydrazone and then subjecting the hydrazone to cyclization and reduction, in either order.

Intermediates for the preparation of pyrazoloazole photographic

Disclosed is a photographic element comprising a silver halide emulsion layer having associated therewith a dye-forming coupler represented by Formula I: ##STR1## wherein R' represents the group ##STR2## in which R.sup.1, R.sup.2, and R.sup.3 independently selected all groups, provided that any two of R.sup.1, R.sup.2, and R.sup.3 may join to form a ring;

Photographic element containing magenta coupler having improved

The invention provides a photographic element comprising a silver halide emulsion layer having associated therewith a dye-forming coupler represented by formula II: ##STR1## wherein X is hydrogen or a coupling-off group;

A process for making a compound of formula III ##STR1## wherein R.sub.6 is a group bonded to the rest of the molecule by a carbon atom;

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Rochester, NY, United States of America

Robert F Romanet