Eastman-kodak Company

Susan M Fischer

Robert F Romanet

Paul A Burns

Paul P Spara

David G Lincoln

Daniel L Kapp

Rajiv P Balasubramanian

Stanley W Cowan

Frank D Coms

Gary M Russo

Michael W Crawley

Rakesh Jain

Ping W Tang

William R Schleigh

David J Decker

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 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

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 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

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;

The invention provides a photographic light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye-forming coupler having the formula: ##STR1## wherein: R.sub.1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom;

Photographic dye-forming coupler, emulsion layer, element, and process

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

Susan M Fischer