Filter dyes for photographic elements

Details Filter dyes for photographic elements Filter dyes for photographic elements

1993-02-10

1995-03-21

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

548217, 5483701, 549399, 549481, 549491, 549494, 558370, 558388, 558390, 558393, 558394, 558395, 558401, 558403, C09B 2301, C09B 2302, C09B 2304, C09B 2306

Patent

active

053996909

ABSTRACT:
Solid particle dispersions of dyes according to the formula: ##STR1## wherein D is selected from the group consisting of ##STR2## and ketomethylene nuclei are disclosed as filter dyes for photographic elements.
In this formula, E.sup.1 and E.sup.2 are each independently electron withdrawing groups. R.sup.1 and R.sup.6 are each independently R or NHR, where R is aryl. R.sup.2 and R.sup.3 are each independently alkyl or aryl, or represent the carbon atoms necessary to form a fused ring with the phenyl ring to which the N atom is attached. R.sup.4 and R.sup.7 are each independently hydrogen, alkyl or aryl. R.sup.5 is alkyl. Z represents the atoms necessary to complete a 5 or 6 memebered heterocyclic nucleus. M.sup.+ is a cation. L.sup.1 through L.sup.7 are each independently methine groups. m is 0, 1, 2, or 3. n is 0 or 1. p is 0, 1, 2, 3, or 4. q is 0, 1, 2, or 3. At least one of R.sup.1 or D includes an aryl ring substituted with a carboxy or sulfonamido substituent.

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