SYNTHESIS OF SOME NEW HETEROARYLBISAZO DYES DERIVED FROM p-AMINOAZOBENZENE

Taha A. Ameen, A. A. Fadda

Abstract


Several novel arylbisazopyrazolo[1,5-a]pyrimidines were achieved from diazotization of 4-aminoazobenzene and coupling with malononitrile and then refluxed with hydrazine hydrate to give 3,5-diamino-4-arylbisazo-1H-pyrazole.The later compound was diazotized and coupled with bifunctional reagents to produce novel heteroarylbisazo dyestuffs. Structural characterization of these novel dyes was carried out using IR, 1H NMR, and mass spectroscopy.


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DOI: http://dx.doi.org/10.17628/ecb.2018.7.239-245

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