Some novel azo disperse dyes synthesis by the coupling component of diazonium salt with 1-(4-amino-2-methyl phenyl)2-(N-phenyl amino) ethanone. Thus a series of azo disperse dyes has been prepared. After syntheses compounds were characterized by chemical as well as instrumental methods. like Melting point,elemental analysis and UV-Visible spectral studies.The dyeing performance of all the dyes was evaluated on nylon and polyester fabrics and studies of fastness properties.