Zeromethine merocyanine dyes useful as spectral sensitizers in p

Details Zeromethine merocyanine dyes useful as spectral sensitizers in p Zeromethine merocyanine dyes useful as spectral sensitizers in p

1996-03-07

1996-12-24

McKane, Joseph K.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548180, 548181, 548121, 548217, 548227, 5483061, 548150, 546174, 546176, C07D41704

Patent

active

055874827

ABSTRACT:
The present invention is directed to a dye suitable for spectral sensitization of a photographic element. Specifically, the dye is a compound having the structure: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each independently represents H; halogen; alkyl of 1-6 carbons; aryl of 6-24 carbons; alkoxy of 1-6 carbons; carbonyl; or sulfonate; or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, or R.sup.3 and R.sup.4 taken together represent the atoms necessary to complete a six-membered carbocylic ring;

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CA111:87274z Novel sensitizer dye using silver halide photographic material. Onda et al., p. 632 1989.

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