| abstract |
The colour-photographic material contains, as yellow couplers, compounds of the formula <IMAGE> In this formula, G is a yellow coupler radical bound via the active methylene group to the heterocyclic ring I, X is a nitrogen atom or a carbon atom bound to a hydrogen atom or to a substituent, and R is a hydrogen atom or a substituent. These yellow couplers are so-called two-equivalent couplers which are readily accessible and do not tend to form fog in the photographic material. |