Synthesis of Monoazo Reactive Dyes Based on 2-(3'-Chlorostyryl)-6-Amino-4-Oxoquinazoline System and Their Application

Abstract

2-( 1´-Hydroxy naphthyl-3´-monosulphonic acid-6´-yl-amino)-4-

(2"-meta-chloro-styryl-4"-oxoquinazoline-6"-yl-amino )-6-chloro-S-

triazine used as coupling component was synthesised by treatment

of 2-( l´-hydroxy naphthyl-3´-monosulphonic acid-6´ -yl-amino)-4,6-

dichloro-S-triazine with 2-(3´-chloro-styryl)-6-amino-4-oxoquinazoline

was coupled with diazo solutions of various amines to

give 2-(1´-hydroxy-2´-azo-naphthyl-3´monosulphonic acid-6´-yl-amino

)-4-(2" -meta-chloro-styryl-4"-oxoquinazoline-6"-yl-amino)

-6-chloro-S-triazine. Coupling component was prepared by dissolving

a mixture of J-acid and cyanuric chloride. Dyeing properties of

these dyes on cotton, wool and silk were assessed. A study of the

fastness of dyed patterns showed that dyes had good light fastness,

good to excellent fastness to washing and rubbing and very good

to excellent exhaustion.