| 摘要 |
Monoazo dyes corresponding to the following formula <IMAGE> are suitable for use as light-stable cyan image dyes stable to reducing agents for the dye diffusion transfer process. In the above formula: Q represents the remainder of the molecule required to complete a fused benzene or thiophene ring, which contains additional electron acceptor groups, or to complete a fused pyridine, pyrimidine, pyridazine, pyrazine or thiazole ring; G represents -OH, acyloxy; R1 represents H or one or two identical or different radicals selected from the group consisting of halogen, acyl, acylamino and -CN; Y represents H, -OH, an amino group optionally substituted by alkyl or aryl, a cyclic amino group or a group of the formula -NH-SO2-R2; R2 represents alkyl, aryl, an amino group optionally substituted twice by alkyl or a cyclic amino group; n=0, 1 or 2.
|
