| abstract |
Compounds of the formula <IMAGE> wherein Me denotes Zn, Cu, Co (II) or Ni; R1 denotes hydrogen, optionally substituted aryl or optionally substituted hetaryl; R2 denotes hydrogen, optionally substituted alkyl, cycloalkyl, aralkyl, aryl or hetaryl; R3 denotes a substituent; n denotes 0-4; and R4 denotes hydrogen or methyl; are suitable for pigmenting macromolecular substances and give very fast pigmentation. |