The synthesis, antimicrobial activity and absorption characteristics of some novel heterocyclic disazo dyes
DYES AND PIGMENTS, vol.80, no.1, pp.47-52, 2009 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 80 Issue: 1
- Publication Date: 2009
- Doi Number: 10.1016/j.dyepig.2008.05.001
- Journal Name: DYES AND PIGMENTS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.47-52
- Keywords: 3-Aminocrotononitrile, Malononitrile, Pyrazole, Disazo dyes, Antimicrobial activity, Solvatochromism, MONOAZO DYES, SOLVATOCHROMIC PROPERTIES, AROMATIC SYSTEMS, FACILE SYNTHESES, DERIVATIVES, AZO
- Eskisehir Osmangazi University Affiliated: Yes
Abstract
Aniline derivatives were diazotized and coupled with 3-aminocrotononitrile to give the corresponding 2-arylhydrazono-3-ketiminobutyronitriles. Cyclization of these arylhydrazono derivatives with hydrazine monohydrate afforded 5-amino-4-arylazo-3-methyl-1H-pyrazoles which were subsequently diazotised and coupled with malononitrile to yield a series of pyrazolylhydrazonomalononitriles. These compounds were then reacted with hydrazine monohydrate to provide 10, novel, heterocyclic disazo dyes, which were characterized by elemental analysis and spectral methods. The antimicrobial activity and absorption characteristics of the dyes were also examined in detail. (C) 2008 Elsevier Ltd. All rights reserved.