2,4-dioxopyrimidine-based mesoionic pigments
AssigneeClariant Produkte (Deutschland) GmbH
InventorsThomas Metz, Carsten Plueg
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Abstract
The invention relates to the dimeric compound of formula (II) wherein the two monomer-units are linked with each other either via R3 or via R4; the ring A is a five-or six-membered heteroaromatic ring, one of the groups R3 or R4 is an unsubstituted or substituted phenylene radical, the remaining group R3 or R4 is a C1-C4 alkyl, C5-C6 cycloalkyl, an unsubstituted or substituted phenyl, benzyl, benzanilide or naphthyl; or wherein the group NR4 together with the ring A constitutes a five-or six membered heterocycle that can be annelated with a benzene ring, and R3 is an unsubstituted or substituted phenylene radical. The inventive compounds can be used for pigmenting high-molecular organic materials.
Claims10
A compound of formula (II)
- where the two monomeric units are linked either via R3 or via R4;
- the ring A is a six-membered heteroaromatic ring of structure A1
- where the ring A1 is unsubstituted, C1-C4-alkyl or phenyl substituted fused with a benzene ring or a combination thereof,
- one of R3 and R4 is an unsubstituted phenylene radical or a phenylene radical substituted by one or more of alkyl-, alkoxy- or halogen-substitutions,
- the other one of R3 and R4 is C1-C4-alkyl, C5-C6cycloalkyl, an unsubstituted phenyl, a phenyl substituted by one or more of alkyl-, alkoxy-, nitro-, phenyl-, alkoxycarbonyl-, dialkylamino-, dialkylaminocarbonyl-, alkylaminocarbonyl-, aminocarbonyl- or halogen-substitutions, benzyl, benzanilide, C5-C6-cycloalky or naphthyl;
- or where the NR4 group combines with the A ring to form a 6-membered heterocycle optionally fused with a benzene ring, and R3 is an unsubstituted phenylene or a phenylene substituted by one or more of alkyl-, alkoxy- or halogen-substitutions;
- and R is C1-C4-alkyl or phenyl.
Dependencies are inferred from the claim text.