Mono:azo dyes from di:nitro-aniline diazo component - useful for dyeing and printing polyester

摘要

Monoazo dyes of formula (I) are new. In (I), K is the residue of a coupler; R is phenylthio or phenylsulphonyl opt. substd. by Cl, Br, CH3, CH3O, C2H5O, NO2 or SO3H; X = H, CL, Br or Cn. Pref. K has formula (II) In (II), R1 = h, CH3, CH3O or C2H5O. R2 is H, Cl, CH3, CH3O or 1-4C alkanoylamino. R3 = H, opt. substd. 1-4C alkyl, allyl, benzyl, phenethyl, cyclohexyl, phenyl or propargyl. R4 = opt. substd. 1-4C alkyl, allyl or propargyl. (I) are made by coupling a diazotised 2,4-dinitroaniline to HK. Used for dyeing or printing textiles, esp. polyester when no water-solubilising gps. are present.