Bicyclic reductone developing agents

Details Bicyclic reductone developing agents Bicyclic reductone developing agents

1978-02-27

1979-05-15

Schilling, Richard C.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 29D, 96 61M, 96 66R, 96 76R, 96 77, 96 95, 96 99, 96100N, 260557R, 260563R, 260563P, 260586F, 560118, G03C 554, G03C 530, G03C 148, G03C 140

Patent

active

041546113

ABSTRACT:
The present invention relates to novel bicyclic compounds useful as photographic silver halide developing agents, to the preparation of these compounds and to photographic products, processes and compositions employing the same. The subject compounds may be represented by the formula ##STR1## wherein R.sub.1 and R.sub.2, the same or different, each represents hydrogen, a hydrocarbon moiety, preferably an alkyl group, --COOH or --COOR.sup.1 wherein R.sup.1 is an alkyl group; R.sub.3 and R.sub.4, the same or different, each represent hydrogen or an alkyl group, R.sub.5 represents hydrogen or --COR.sup.2 wherein R.sup.2 is an alkyl group; R.sub.6 represents hydrogen when R.sub.5 is hydrogen and represents hydrogen or --OCOR.sup.3 wherein R.sup.3 is an alkyl group the same as R.sup.2 when R.sub.5 represents --COR.sup.2 ; X represents --OH, --NH.sub.2 or --NHCOR.sup.4 wherein R.sup.4 represents an alkyl group the same as R.sup.2 ; Y represents --OH or --OCOR.sup.5 wherein R.sup.5 represents an alkyl group the same as R.sup.2 ; and Z represents .dbd.O or .dbd.NCOR.sup.6 wherein R.sup.6 is an alkyl group the same as R.sup.2.

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"Condensation-Cyclization . . . Skeleton", Strauss et al. J. Org. Chem., vol. 35 No. 2 1970, pp. 383-388.
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