Benzo[g]quinoline heterocyclic derivative as a typical precursor in the synthesis of new class of cyanine-like dyes

New unsymmetrical cyanine-like dyes have been synthesized including monomethine, dimethine, and tetramethine, containing heterocyclic quinone of benzo[g]quinoline derivative. The new synthesized compounds were identified by elemental analysis, IR and 1H NMR. The UV visible absorption spectra of dyes are also reported.