Novel xanthene compounds and their photographic use

Details Novel xanthene compounds and their photographic use Novel xanthene compounds and their photographic use

1983-09-01

1986-10-14

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549388, C07D40514, C07D31182

Patent

active

046174028

ABSTRACT:
In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein each R.sup.1 is the same and is selected from ##STR2## R.sup.2 is alkyl, R.sup.3 is an electron-withdrawing group positioned ortho, meta or para to said N atom, R.sup.4 is hydrogen, alkyl or an electron-withdrawing group positioned ortho, meta or para to said N atom; R.sup.5 is alkyl; X is hydrogen, an electron-withdrawing group or an electron-donating group; 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: 4258118 (1981-03-01), Foley et al.
patent: 4267251 (1981-05-01), Locatell, Jr. et al.
patent: 4304834 (1981-12-01), Cournoyer et al.
patent: 4405788 (1983-09-01), Locatell, Jr. et al.
McOmie, Ed., Protective Groups in Organic Chemistry, Plenum Press, London and New York (1973) pp. 46-47.
McOmie, Ed., Protective Groups in Organic Chemistry, Plenum Press, NY (1973) p. 52.
Greene, Protective Groups in Organic Synthesis, John Wiley & Sons, NY (1981) pp. 263-264.

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