SYNTHESIS OF SOME AZO DYES BASED ON 2,3,3-TRIMETHYL-3H-INDOLENINE

Abstract

New azo compounds on the base of 2,3,3-trimethyl-3H-indolenine were synthesized and character-ized by FT-IR, NMR, and Mas-spectral analysis. The synthesis was conducted in three different pathways: 1) by reducing the nitro compound with Zn/NaOH in alcohol; 2) by heating of 2,3,3-trimethyl-3H-indolenine-5-amine in the presence of MnO2 in toluene, and 3) by diazotization of 2,3,3-trimethyl-3H-indolenine-5-amine and treating the resulting diazonium salt with the appropriate coupler.