New Azo Disperse Dyes Derived from 3-(Hydroxyphenyl)-2-Pyrazolin-5-One

The main target of this book was the synthesis of azo disperse dyes derived from 3-(2-hydroxyphenyl)-2-pyrazolin-5-ones with better dyeing properties, together with a systematic investigation to determine their dominant tautomer. The connection between dyeing and fastness properties on the one hand and chemical constitution on the other is in general indefinite. Some factors affecting the current application of these dye types are examined and future developments are considered.