Synthesis of dyes derived from 1-aryl-5-amino-4-cyanopyrazoles

• Author(s): Gupta, Sanjay ; Sivasubramanian, Aravind ; Rodrigues, Lígia M. ; Esteves, Ana Paula ; Hrdina, Radim ; Campos, Ana M. F. Oliveira
• Date: 2006
• Persistent ID: http://hdl.handle.net/1822/5259
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Cyanopyrazole; Azo dyes; Diazotisation
• Document Type: Article
• Language: English

Description

Prova tipográfica (In Press) Eight dyes were prepared by diazotisation of substituted amino-cyano pyrazoles and coupling to anilines or 2-naphthol. The dyes were fully characterised by spectroscopic techniques. The cyano group of the pyrazoles was found to be susceptible to hydrolysis during preparation.