New cyanine dyes for use as spectral sensitizers in color photographic silver halide materials have at least one benzothienyl substituent on a benzoxazole group

摘要

Benzoxazole-containing cyanine dyes with at least one benzothienyl substituent on the benzoxazole group are new. Benzoxazole-containing cyanine dyes of formula (I) with at least one benzothienyl substituent on the benzoxazole group are new. R1 - R6 = a substituent with at least one of R1 - R3 = a benzothienyl substituent; X = O, S, Se, NR7, CH=CH or C(CH3)2; R7 = optionally substituted alkyl; S1 and S2 = alkyl, sulfoalkyl, carboxyalkyl, -(CH2)l-SO2-Y-SO2-alkyl, -(CH2)l-SO2-Y-CO-alkyl, -(CH2)l-CO-Y-SO2-alkyl, -(CH2)l-CO-Y-O-alkyl, (-(CH2)l-NH-SO3)-, (-(CH2)l-N(alkyl)-SO3)- or (-(CH2)l-N(aryl)-SO3)-; l = 1-6; Y = NH or N; n = 0, 1, 2 or 3; L1 - L3 = optionally substituted methine optionally forming part of one or more carbocyclic rings; and M = a counterion