Synthesis and Characterization of Azo-3-Cyano-Iminocoumarin Dyes

The synthesis of Azo-3-cyano-iminocoumarins and corresponding N-substituted derivatives is described according to three steps. These dyes which have not previously been described were obtained in good yields and high selectivity. The proposed structures of the dyes were confirmed and characterized by using IR, 1H NMR, 13C NMR and elemental analysis. Their optical properties, studied in chloroform by UV-vis absorption were found to depend strongly upon the nature of the substituent bone by the imino group and the azoic moiety.