C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
8/3, 400/7074, 2
C09B 29/00 (2006.01) C09B 29/32 (2006.01) C09B 31/02 (2006.01) C09B 31/10 (2006.01) C09B 33/02 (2006.01) C09B 35/035 (2006.01)
Patent
CA 1041091
Abstract of the Disclosure The present invention relates to compounds of formula I, Image in which R1 signifies a group of formula -NN2, -NH-R4 or -O-R4, in which R4 signifies a (C1-8)alkyl ra- dical, a (C5-8)cycloalkyl ra- dical or an unsubstituted or substituted phenyl, naphthyl or heterocyclic radical, each of R2 and R3, which may be the same or diffe- rent, signifies a hydrogen atom, a hydroxyl, (C1-8)alkoxy, amino, (C1-8)cycloalkylamino, (C1-8) alkylamino, (C1-8)dialkylamino, phenyl- or naphthylamino or N- phenyl-N-(C1-8)alkylamino group, A signifies a nitrogen atom or a group of formula ?C-R6, in which R6 signifies a hydrogen or halogen atom or a (C1-8)alkyl radical, either n is 1 and D signifies the radical of a diazo component, or n is 2 and D signifies the radical of a tetraazo component which compounds are useful as colouring materials, espe- cially as pigments.
210791
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