Coumarine dyestuffs of the dispersion series
AssigneeCiba-Geigy Corporation
InventorsSiegfried Dengler, Peter Loew, Christian Zickendraht, Hansrudolf Schwander
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Abstract
Dyestuffs of the formula ##STR1## wherein R, R.sub.1, and R.sub.2 represent optionally substituted alkyl groups that can be interrupted by heteroatoms, and also represent cycloalkyl, aralkyl, aryl, or heterocyclic radicals, R and R.sub.1 can also be hydrogen atoms, R.sub.1 and R.sub.2, together with the nitrogen atom, are able to form a 5-membered or 6-membered ring, R and R.sub.2 are able to combine to form a nitrogen-containing heterocycle, B is =O or =NH, and A represents a heterocycle. The new dyestuffs dye synthetic fibers, especially polyester fibers, in greenish yellow shades.
Claims3
A dyestuff of the formula ##STR40## wherein R, R.sub.1 and R.sub.2 are individually alkyl of 1 to 4 carbon atoms, unsubstituted or substituted by chloro, hydroxy, cyano, methoxy, acetoxy, butyryloxy, methoxycarbonyl, ethoxycarbonyl or phenyl;
- or are phenyl or phenyl substituted by methyl, ethyl, propyl, methoxy, ethoxy, cyano, chloro, bromo, nitro or acetylamino;
- and
- R and R.sub.1 additionally represents hydrogen, or R.sub.1 and R.sub.2 together additionally represent, together with the nitrogen to which they are attached, the piperidine ring;
- and the benzene ring A is unsubstituted or substituted by chloro;
- bromo;
- lower alkyl;
- lower alkoxy;
- acetyl;
- lower alkylsulphonyl;
- nitro or thiocyano.
Dependencies are inferred from the claim text.