Cyanine dyes

Details Cyanine dyes Cyanine dyes

1989-12-19

1993-05-25

Chan, Nicky

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31166

Patent

active

052141640

ABSTRACT:
The present invention relates to chemical substances having dye properties, or more particularly, to improved cyanine dyes and to their application in photographic bleaching processes. Preferably, a chromylium group on the hetero ring comprises either a substituted phenyl group or an alkyl group. More particularly, O-halogenated phenyl and t-butyl groups have proven to be advantageous substituents.

REFERENCES:
patent: 3300314 (1967-01-01), Rauner et al.
patent: 3671251 (1972-06-01), Houle et al.
patent: 4247799 (1981-01-01), Drexhage
patent: 4416961 (1983-11-01), Drexhange
Gavnilyuk et al., Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 304-308 (1983) (English translation at pp. 243-247).
Chem. Abstract 84:75718h, 1976.
Chem. Abstract 89:45061z (1978).
Detty, M. R. et al, "telluropyrylium dyes . . . ", J. Org. Chem., 47, pp. 5235-5239 (1982).
Chem. Abstract 99:6859c (1983).
Chem. Abstract 99:72161v (1983).

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