3,6-Di(alkyl/phenyl)amino-9-carboxamidophenyl-xanthenes
AssigneePolaroid Corporation
InventorsLouis Cincotta, James W. Foley
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Abstract
In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein each R.sup.1 the same or different is hydrogen or alkyl, each R.sup.2 the same or different is alkyl or phenyl, R.sup.3 is phenyl or alkyl, Y is an electron-withdrawing group and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.
Claims6
A compound of the formula ##STR20## wherein each R.sup.1 the same or different is hydrogen or alkyl having 1 to 4 carbon atoms, each R.sup.2 the same or different is alkyl or phenyl having 1 to 4 carbon atoms, R.sup.3 is phenyl or alkyl having 1 to 4 carbon atoms, Y is an electron-withdrawing group having a positive sigma value greater than 0.6 as defined by Hammett's Equation, and A is an anion.
The compound ##STR21##
Dependencies are inferred from the claim text.