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This book reported the literature survey since the pyrazolone chemistry began in 1883 by Ludwig Knorr to date concerning on tautomerism, synthetic approaches and chemical properties of title compounds as well as their chemical reactions. Furthermore, the obtained results were discussed, novel 2-Pyrazolin-5-ones were synthesized, the synthetic mechanisms were investigated and compounds were established by elemental analysis and spectral data. Additionally, these series of the synthesized dyes were applied as disperse dyes for dyeing polyester fabrics and their fastness properties were...

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.