Fluorescent diketopyrrolopyrrole analogues

Abstract

The present invention relates to fluorescent diketopyrrolopyrrole analogues of the general formula (I), wherein Aand Aare C–Calkyl, C–Calkenyl, C–Calkynyl, C–Ccycloalkyl, C–Ccycloalkenyl, aryl or heteroaryl, Aand Aare independently of each other C–Calkyl, Ar, —CRR—(CH)—Ar, or Y—R, wherein Rand Rindependently of each other stand for hydrogen or C–Calkyl, or phenyl which can be substituted up to three times with C–Calkyl, Arstands for aryl, in particular phenyl or 1- or 2-naphthyl, C–Ccycloalkyl, in particular cyclohexyl, or heteroaryl, which can be substituted one to three times with C–Calkyl, C–Calkoxy, halogen or phenyl, which can be substituted with C–Calkyl or C–Calkoxy one to three times, and m stands for 0, 1, 2, 3 or 4, Y is C(O)— or SO— and Ris C–Calkyl, Ar, or aralkyl and Acan additionally be hydrogen, C–Calkyloxycarbonyl, such as tertbutoxycarbonyl, or aralkyloxycarbonyl, such as benzyloxycarbonyl, a process for their preparation and their use for the preparation of inks, colourants, pigmented plastics for coatings, non-impact printing material, colour filters, cosmetics, polymeric ink particles, toners, dye lasers and electroluminescent devices, or as fluorescent markers for immunoassays and fluorescent tracers for leak detection of fluids. The diketopyrrolopyrrole analogues of the general formula I show a high solid state fluorescence