Process for stabilizing photographic material containing magenta coupler

Claim 1

A process for stabilising photographic silver halide material containing magenta coupler, which comprises incorporating into the silver halide emulsion layer containing the magenta coupler or into an adjoining colloid layer at least one compound of the formula I ##STR41## in which n is the number 1 or 2 and A, if n is 1, is a group of the formula II ##STR42## in which R 1 is C 1 -C 18 -alkyl, C 5 -C 6 -cycloalkyl, Cl, Br, CN, C 7 -C 21 -aralkyl or a group of the formula III ##STR43## in which X is C 2 -C 8 -alkylene and Y is a --OR 4 , --N(R 5 )(R 6 ), C 1 -C 4 -alkyl, the residue ##STR44## wherein B is C 1 -C 18 -alkylene which is uninterrupted or interrupted one or more times by --O-- or --S-- or is a group of the formula ##STR45## R 2 is hydrogen, R 1 or a --OR 7 group, R 3 is hydrogen or R 1 , R 4 is C 1 -C 18 -alkyl which is uninterrupted or interrupted one or more times by --O-- or is a polyethylene glycol radical, phenyl, substituted phenyl or benzyl, R 5 and R 6 , independently of each other, are hydrogen, C 1 -C 18 -alkyl, phenyl, benzyl, or a --(CH 2 ) m --O--R 8 group, R 7 is hydrogen or C 1 -C 4 -alkyl, R 8 is C 1 -C 18 -alkyl and m is a number between 1 and 4, or R 2 and R 3 together are C 3 -C 8 -alkylene or a group ##STR46## in which R 9 , R 10 , R 11 independently of one another are each C 1 -C 4 -alkyl, or A, if n is 2, is a group of the formula IV ##STR47## in which R 12 and R 13 , independently of one another, are each C 1 -C 18 -alkyl or a group of the formula III or A is a group of the formula V ##STR48## in which R 8 and R 9 are as defined above.