| 摘要 |
Dyes having the structure <IMAGE> A represents a substituted or unsubstituted nucleus selected from the group consisting of rhodanines, hydantoins, 2-thiohydantions, 4-thiohydantoins, 2,4-oxazolidindiones, 2-thio-2,4-oxazolidindiones, isoxazolinones, barbiturics, 2-thiobarbiturics, and indandiones, said nucleus having a carboxyphenyl substituent or sulfonamidophenyl substituent, R represents hydrogen, alkyl of 1 to 4 carbon atoms, or benzyl, R1 and R2 each independently represents alkyl or aryl, or taken together with R5, R6, N, and the carbon atoms to which they are attached represent the atoms needed to complete a julolydyl ring, R3 represents H, alkyl, or aryl, R5 and R6 each independently represents H, or R5 taken together with R1, or R6 taken together with R2, each may 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.
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