Synthesis of 5-(3'-amino-4'-arylazo-1H-pyrazol-5'-yl azo) barbituric acid dyes and investigation of spectroscopic properties

In this study, firstly aniline derivatives were diazotized and then these diazotized compounds were reacted with malononitrile for synthesizing the aril-azo malononitrile compounds (1a-1m). secondly, 4-arylazo-3,5- diamino-1h-pyrazole (2a-2m) derivatives were synthesized by effecting hydrazine monohydrate with aril-azo malononitrile compounds (1a-1m). finally, the diazonium salts of these compounds were reacted with barbituric acid and 5-(3'-amino-4'-arylazo-1h-pyrazole-5'-yl-azo) barbituric acid compounds (3a-3m) which target compounds were obtained. the structures of (3a-3m) compounds were characterized with at-ir, 1h-nmr and uv–visible spectroscopy. as a result, it was gained 13 novel disperse disazo dyes to azo dye and textile literature.