Patent ID: 6498003
Filing Date: 2002-12-24
Classification: G03C

Abstract:
A photographic material comprising a support and at least one layer which comprises at least one spectrally sensitized silver halide emulsion, and the material contains at least one compound of formula and/or whereinR1 is H, alkyl, aryl, aralkyl, alkenyl or heterocyclyl, R2 is OH, NH2, NHR7 or NR8R9 or R1 together with R2, are the atoms necessary for the completion of a heteroaliphatic ring, R3 is OH, NH2, NHR7 or NR8R9, R4 is H, alkyl, aryl, aralkyl, alkenyl or heterocyclyl, R5 and R6 independently of each other, are OH, NH2, NHR10 or NR11R12 or R4 together with R5, or R4 together with R6, are the atoms necessary for the completion of a heteroaliphatic ring, and the R5 or R6 radical, which is not part of a ring, is OH, NH2, NHR10 or NR11R12, R7 and R10 independently of each other are alkyl, aryl, aralkyl or heterocyclyl, R8 and R9 independently of each other, denote alkyl, aryl, aralkyl or heterocyclyl, or R8 together with R9, are the atoms necessary for the completion of a heteroaliphatic ring, and R11 and R12 independently of each other, are alkyl, aryl, aralkyl or heterocyclyl, or R11 together with R12, are the atoms necessary for the completion of a heterocyclic ring, and wherein only one of the radicals R2 and R3 and only one of the radicals R5 and R6 is OH or NH2.