Eastman-kodak Company

Sterling Winthrop Inc.

Terrence C Mungal

Ping-Wah Tang

Stanley W Cowan

Ping W Tang

Philip T Lau

Kenneth C Mattes

David J Decker

Byron Rubin

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

Photographic emulsion layer containing pyrazoloazole coupler exhibiting

A process of preparing an N-(4-chloropyrazolyl) amidoxime comprises reacting a compound of the formula ##STR1## with a compound of the formula ##STR2## to obtain compounds of formulae (IIIA) and/or (IIIB) ##STR3## and converting the compounds of formulae (IIIA) and/or (IIIB) to an amidoxime of formula (II) ##STR4## wherein R and R' independently represent hydrogen or a substituent.

Process of preparing pyrazolo  1,5-b! 1,2,4! triazoles

The present invention is related to compounds which inhibit pancreatic cholesterol esterase. The compounds have the formula: ##STR1## wherein R.sup.1 is H or C.sub.1-6 alkyl;

Lactam inhibitors of cholesterol esterase

Novel yellow dye-forming couplers, and photographic elements, emulsions and processes for developing images utilizing the novel couplers, are disclosed. The novel couplers include (a) an acyl acetanilide in which the acyl group has a monocyclic or multicyclic carbon center attached to the carbonyl moiety, and (b) an aryloxy coupling-off group at the coupling position of the acylacetanilide, the coupling-off group having in the ortho position a polarizable substituent.

Yellow couplers having an arloxy coupling-off group which contains an

Novel cyclic azole couplers and photographic elements containing them are described. The couplers are represented by the following structure: ##STR1## wherein: COUP is a cyclic azole coupler moiety;

Photographic element with a cyclic azole coupler having a saccharin

The invention provides new magenta-dye-forming couplers, new magenta dyes formed therefrom, and new photographic elements containing the new couplers. The new couplers have the structure (I):

Photographic elements containing new magenta-dye-forming bis couplers

A process of preparing 1H-pyrazolo [1,5-b][1,2,4] triazole compounds represented by formula (I): ##STR1## wherein R and R' independently represent H or a substituent, and X represents a coupling-off substituent, comprises subjecting an amidoxime of formula (II) ##STR2## to a cyclization reaction to obtain the compound of formula (I).

Process for preparation of 1H-pyrazolo [1,5-b][1,2,4]triazole compounds

A process of preparing 1H-pyrazolo [1,5-b][1,2,4] triazole compounds represented by formula (I): ##STR1## wherein R and R' are independently hydrogen or a substituent and X is hydrogen or a coupling-off group, comprises subjecting a compound of formula (II) ##STR2## wherein Y and Z are each substituent groups and n is 0, 1 or 2, to a cyclization reaction.

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Rochester, NY, United States of America

Terrence C Mungal