Xanthene compounds

Details Xanthene compounds Xanthene compounds

1981-07-10

1984-01-31

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31182

Patent

active

044291426

ABSTRACT:
In one embodiment, the present invention is concerned with novel xanthene compounds selected from those of the formulae ##STR1## wherein each R.sup.1 the same or different is alkyl, each R.sup.2 the same or different is an electron-withdrawing group having a positive sigma value greater than 0.6, X is ##STR2## wherein R.sup.3 is alkyl, Y is an electron-withdrawing group, n is 0 or 1 and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds, e.g., as photographic light-screening dyes.

REFERENCES:
patent: 4290955 (1981-09-01), Cinotta et al.

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