| 摘要 |
<p>Dyes having the structure <CHEM> wherein A represents a substituted or unsubstituted acidic nucleus having a carboxyphenyl substituent selected from the group consisting of 2-pryazolin-5-ones free of any substituent bonded thereto through a carboxyl group, rhodanines, hydantoins, 2-thiohydantoins, 4-thiohydantoins, 2,4-oxazolidindiones, 2-thio-2,4-oxazolidindiones, isoxazolinones, barbituric, 2-thiobarbiturics, and indandiones, R represents hydrogen, substituted or unsubstituted alkyl of 1 to 4 carbon atoms, or benzyl, R<1> and R<2> each independently represents substituted or unsubstituted alkyl or aryl, or taken together with R<5>, R<6>, N, and the carbon atoms to which they are attached, represent the atoms needed to complete a julolydyl ring, R<3> represents H, or substituted or unsubstituted alkyl or aryl, R<5> and R<6> each independently represents H, or R<5> taken together with R<1>, or R<6> taken together with R<2>, represent the atoms necessary to complete a carbocyclic ring, and m is 0 or 1 are disclosed. The dyes are useful as filter dyes in photographic filter layers.</p> |
