Dyestuffs

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C - Chemistry, Metallurgy

09

B

8/1, 260/251, 26

C09B 23/00 (2006.01) C09B 23/01 (2006.01) D06P 1/00 (2006.01) D06P 1/16 (2006.01)

Patent

CA 1050024

ABSTRACT OF THE DISCLOSURE The present invention relates to com- pounds of formula I, Image I in which R1 signifies a divalent, mono- or bi- nuclear aromatic radical of the carbo- cyclic or heterocyclic series, R2 signifies a hydrogen atom or an un- substituted or substituted (C1-4)alkyl, phenyl, naphthyl or mono-or fused binuclear heterocyclic radical which is bound through a carbon atom, and each of the R4's in- dependently, sigifies a mono- or binuclear aromatic radical of the carbocyclic or heterocyclic series, or mixtures of such compounds, which compounds and mixtures are useful as colourants.

214819

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