| abstract |
Dyestuffs of the formula <IMAGE> wherein D is a heterocyclic diazo component, R1 is an alkyl radical which may be substituted, R2 is phenylene or alkylene d is hydrogen, chloro, lower alkyl, lower alkoxy, aryl, aryloxy or arylmercapto, and R is an optionally substituted alkyl, aryl or amino group, dye polyester fibers in red and blue shades with good fasteners, and are suitable for use in the thermosol process. |