| 摘要 |
PURPOSE:To obtain the title compound having a reduced deleterious effect and is useful as a dye, a photographic dye, a dye for filtering, a recording compound of an optical information recording medium, a dye for staining a biological sample, a medicine or the like by forming a cyanine compound having a substituent in the methine chain of an indolenine cyanine dye. CONSTITUTION:A cyanine compound of formula I wherein Z1 and Z2 are each a group of nonmetallic atoms necessary for forming the benzo fused ring or the naphtho fused ring substituted with an acidic substituent; R<1> is alkyl or ary; R<2> and R<3> are each alkyl substituted with an acidic substituent; m is 2 or 3; X is an anion; n is 1 or 2; and n is 1 when the dye forms an inner salt is provided. This compound is obtained by reacting a compound of formula II with a compound of formula II at 0-100 deg.C in the presence of water or an organic solvent. |
