Synthesis and Application of Some Azo and Azomethine Dyes Containing Pyrazolone Moiety

Autor:	Mohamed A. El-Borai, Hatem F. El-Sayed, G. B. El-Hefnawy, Hala F. Rizk
Rok vydání:	2009
Předmět:	Pyrazolone General Chemistry Free amino Disperse dye Polyester chemistry.chemical_compound chemistry Elemental analysis Polymer chemistry medicine Organic chemistry Moiety Phenols Derivative (chemistry) medicine.drug
Zdroj:	Chinese Journal of Chemistry. 27:1359-1364
ISSN:	1614-7065 1001-604X
DOI:	10.1002/cjoc.200990227
Popis:	3-Amino-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (1) was used as starting material for the synthesis of a number of azo compounds 3a–3c and azomethine derivative 4. The deblocking of 3a–3c and 4 gave rise to 5a–5c and 6 in which a free amino was revealed. The diazonium salts of 5a–5c and 6 were coupled with several phenols to produce a number of bis azo compounds 7a–7c and 8a–8c with azomethine in position 4 and azoic group in position 3. The prepared dyes were structurally confirmed by elemental analysis, spectral methods and applied to different fibers (wool, polyester and blend of wool/polyester) as disperse dyes and their fastness properties were measured.
Databáze:	OpenAIRE
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