Novel 2-phenyl-3-{4’-[N-(4”-aminophenyl)carbamoyl]-phenyl}-quinazoline-4(3H)one-6-sulphonic acidbased mono azo reactive dyes

Abstract

A series of new heterocyclic mono azo reactive dyes 7a–m were prepared by diazotization of 2-phenyl-3-{4’-[N-(4”-aminophenyl)carbamoyl]-phenyl}-quinazoline-4(3H)-one-6-sulphonic acid (3) and coupling with various cyanurated coupling components 6a–m and their dyeing performance on silk, wool and cotton fibres was assessed. These dyes were found to give a variety of colour shades with very good depth and levelness on the fibres. All the compounds were identified by conventional method (IR and 1H-NMR) and elemental analyses. The percentage dye bath exhaustion on different fibres was reasonably good and acceptable. The dyed fibre showed moderate to very good fastness to light, washing and rubbing.

Keywords

• quinazoline-4(3H)-one
• mono azo reactive dyes
• dyeing
• fastness properties.