Color-forming sulfonamidodiphenylamine dye precursor that produces phenazine dye
AssigneeEastman Kodak Company
InventorsRolf S. Gabrielsen, Patricia A. Graham, James E. Klijanowicz
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Abstract
A color-forming para sulfonamidodiphenylamine dye precursor has one or two sulfonamido groups in positions ortho to the amine --NH-- moiety separating the two phenyl rings of the para sulfonamidodiphenylamine and, in oxidized form, intramolecularly reacts to produce a sulfonamido-substituted phenazine dye. Such color-forming para sulfonamidodiphenylamine dye precursors are useful to produce a dye image by cross-oxidation in an imaging material.
Claims9
A color-forming para-sulfonamidodiphenylamine dye precursor having one or two sulfonamido groups in positions ortho to the amine --NH-- moiety separating the two phenyl rings of the para-sulfonamidodiphenylamine, the remaining two or three ortho positions of the sulfonamidodiphenylamine being unsubstituted, and wherein the parasulfonamidodiphenylamine, in oxidized form, intramolecularly reacts to produce a sulfonamido substituted phenazine dye.
A color-forming para-sulfonamidodiphenylamine dye precursor represented by the formula:
- ##STR35## wherein:
- R is alkyl containing 1 to 20 carbon atoms, aryl containing 6 to 20 carbon atoms or alkaryl containing 7 to 20 carbon atoms;
- R.sup.1 and R.sup.2 are individually hydrogen, alkyl containing 1 to 4 carbon atoms or --NHSO.sub.2 R.sup.4 ;
- and at least one of R.sup.1 and R.sup.2 is --NHSO.sub.2 R.sup.4 ;
- R.sup.3 is alkoxy containing 1 to 20 carbon atoms, alkyl containing 1 to 20 carbon atoms, or ##STR36## R.sup.4 is alkyl containing 1 to 20 carbon atoms, aryl containing 6 to 20 carbon atoms or alkaryl containing 7 to 20 carbon atoms;
- R.sup.5 is hydrogen or alkyl containing 1 to 20 carbon atoms;
- and
- R.sup.6 is alkyl containing 1 to 20 carbon atoms.
A dye precursor which is [2'-methylsulfonamido-4'-(2,4,6-triisopropyl)sulfonamido 2-methyl-4-(2-methanesulfonamido)ethyl ethylamino diphenylamine] represented by the formula:
- ##STR39##
A dye precursor which is [4-(.beta.-methanesulfonamidoethyl)ethylamino-2-methyl-2',4'-bis(2,4,6-tri isopropyl)phenylsulfonamido diphenylamine] represented by the formula:
- ##STR41##
Dependencies are inferred from the claim text.