Xanthene compounds

Details Xanthene compounds Xanthene compounds

1980-10-06

1981-12-22

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

548207, C07D51310

Patent

active

043070175

ABSTRACT:
The present invention is concerned with novel xanthene compounds of the formulae ##STR1## and ##STR2## wherein each R.sup.1 the same or different is alkyl or benzyl; each R.sup.2 the same or different is an electron-withdrawing group having a positive sigma value greater than 0.6; R.sup.3 is hydrogen or alkyl; R.sup.4 is alkyl; and n is 0 or 1, said R.sup.2 group being ortho, meta or para to said N atom. The subject compounds are useful as light-screening dyes in photographic products and processes.

REFERENCES:
patent: 4231929 (1980-11-01), Bloom et al.
Muller, Methoden der Organischen Chemie, Georg. Thieme Verlag Stuttgart, 1970, p. 78.

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