Quinoxalines and their use in photographic processes

Details Quinoxalines and their use in photographic processes Quinoxalines and their use in photographic processes

1979-02-26

1980-05-13

Kelley, Mary F.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Disparate function simultaneous process step

430430, 430462, G03C 700, G03C 176

Patent

active

042026989

ABSTRACT:
Quinoxalines of the formula ##STR1## are provided, in which R.sub.1 and R.sub.2 independently are lower alkyl R.sub.3 is lower alkyl, --CH.sub.2 OR.sub.5, --CH.sub.2 NRR', --CH.sub.2 OCOR, --CH.sub.2 Cl, --CH.sub.2 Br, --CH.sub.2 SR, --CH.sub.2 O(CH.sub.2).sub.p OR, --CH.sub.2 PO(OR.sub.5).sub.2, --CH.sub.2 PO(OR.sub.6).sub.2, --CH.sub.2 SO.sub.3 R.sub.6, --O(CH.sub.2).sub.m OR, --O(CH.sub.2).sub.p SO.sub.3 R.sub.6 or --(OCH.sub.2 CH.sub.2).sub.n OAr, R.sub.4 is hydrogen, lower alkyl or alkoxy when R.sub.3 is other than lower alkyl, or R.sub.4 is --OH, --NRR', --NHCOR, --NHCOAr', --NHSO.sub.2 R.sub.5 or --NHSO.sub.2 Ar', R and R' independently are hydrogen or lower alkyl, R.sub.5 is lower alkyl, R.sub.6 is hydrogen, an alkali metal cation or --N.sup..sym. (R).sub.4, Ar is aryl or sulphonated aryl, Ar' is aryl or substituted aryl, m is 3 or 4, n is 1 to 3 and p is 2 to 4.
The quinoxalines are useful as bleach catalysts, especially as dye bleach catalysts, for the photographic silver dye bleach process.

REFERENCES:
patent: 2221793 (1940-11-01), Gaspar
patent: 3429705 (1969-02-01), Piller
patent: 3457074 (1969-07-01), Wilson et al.
patent: 3656953 (1972-04-01), Schlunke et al.
patent: 3767402 (1973-10-01), Schlunke et al.
patent: 3796576 (1974-03-01), Schlunke et al.
patent: 3963492 (1976-06-01), Marthaler et al.
patent: 4014698 (1977-03-01), Marthaler et al.

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