Disperse dyes derived from 2-methoxy-5-nitroaniline

A series of disazo disperse dyes containing nitro and methoxy groups were synthesized for dyeing of polyester fibre. The diazo component having the nitro and methoxy groups were prepared and coupled with the corresponding coupling components to give 2-methoxy-5-nitrophenylazo-2- hydroxy-4-aminobenzene dyes. The absorption maxima of the dyes were dependent upon the substituents in the diazo and coupling components and varied from 416 to 767nm in DMF. The dyes showed excellent wash fastness and sublimation fastness on polyester substrate. The light fastness of the dyes on polyester was also good. The structure of each compound was confirmed by infrared, Uvvisible and 1H NMR analyses.