| abstract |
Dyestuffs of the formula <IMAGE> wherein R, R1, and R2 represent optionally substituted alkyl groups that can be interrupted by heteroatoms, and also represent cycloalkyl, aralkyl, aryl, or heterocyclic radicals, R and R1 can also be hydrogen atoms, R1 and R2, together with the nitrogen atom, are able to form a 5-membered or 6-membered ring, R and R2 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. |