Xanthene compounds

Details Xanthene compounds Xanthene compounds

1980-10-06

1982-01-12

Rizzo, Nicholas S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D27504

Patent

active

043106730

ABSTRACT:
The present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein R is hydrogen or alkyl, which compounds are useful in photographic products and processes.

REFERENCES:
patent: 1879537 (1932-09-01), Schneider
patent: 1994876 (1935-03-01), Schneider et al.
patent: 2182794 (1939-12-01), Dawson
patent: 2203767 (1940-06-01), Baldsiefen
patent: 2203768 (1940-06-01), Baldsiefen
patent: 2350090 (1944-05-01), Beilenson
patent: 3005711 (1961-10-01), Burgardt et al.
patent: 3406069 (1968-10-01), Overman
patent: 3615548 (1971-10-01), Firestine
Bielstein's Handbuch der Organischen Chemie, vol. 27, p. 534.

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