Quinoxaline bleach catalysts

Details Quinoxaline bleach catalysts Quinoxaline bleach catalysts

1978-10-12

1980-08-05

Coughlan, Jr., Paul M.

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544337, 544353, C07D24142, C07D49114

Patent

active

042163200

ABSTRACT:
Quinoxalines of the formula ##STR1## are provided, in which R.sub.1 is hydrogen if R.sub.3 and R.sub.4 conjointly are --O(CH.sub.2).sub.p O--, or is --CH.sub.2 OR, --CH.sub.2 NRR', --CH.sub.2 OCOR, --CH.sub.2 Cl, --CH.sub.2 Br, --CH.sub.2 CN, --CH.sub.2 SR, --CH.sub.2 SCN, --CH.sub.2 O(CH.sub.2).sub.m OR, --CH.sub.2 (OCH.sub.2 CH.sub.2).sub.n OR, --CH.sub.2 SO.sub.2 R.sub.5, --CH.sub.2 PO(OR.sub.5).sub.2, --CH.sub.2 SO.sub.3 R.sub.6 or --CH.sub.2 PO(OR.sub.6).sub.2 and R.sub.2 is lower alkyl, --CH.sub.2 PO(OR.sub.5).sub.2, --CH.sub.2 PO(OR.sub.6).sub.2 or CH.sub.2 SO.sub.3 R.sub.6, R.sub.3 and R.sub.4 independently are lower alkyl, lower alkoxy, RO(CH.sub.2).sub.m O-- or RO(CH.sub.2 CH.sub.2 O).sub.n -- or R.sub.3 and R.sub.4 conjointly are --O(CH.sub.2).sub.p O--, 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, m is 3 or 4, n is 1 to 3 and p is 1 or 2.
The quinoxalines are useful as bleach catalysts, especially as dye bleach catalysts, in processing baths for the photographic silver dye bleach process.

REFERENCES:
patent: 2748117 (1956-05-01), Druey et al.
patent: 3875158 (1975-04-01), Schlunke et al.
patent: 3884918 (1975-05-01), Schlunke et al.

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