Dyes of the coumarin series

Abstract

Dyes of the formula: ##STR1## in which Z is unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl, aryl or heteroaryl or a radical of the formula ##STR2## Z.sup.1, Z.sup.2, Z.sup.3 and Z.sup.4 are hydrogen or unsubstituted or substituted alkyl, cycloalkyl, aralkyl or aryl; Z.sup.1 and Z.sup.2 or Z.sup.3 and Z.sup.4 may together with the nitrogen form a heterocyclic ring; Z.sup.1 and Z.sup.2 together with the nitrogen may be a saturated unsubstituted or substituted 5-membered or 6-membered ring condensed on in the ortho-position to the nitrogen; B is unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl, aryl or heteroaryl; and X is imino or oxygen. The dyes give brilliant yellow dyeings having good fastness properties on textile materials, particularly polyester materials, and in plastics.

Dependencies are inferred from the claim text.