Synthesis of 2-styrylthiazolo[4,5-b]quinoxaline based fluorescent dyes

A novel efficient synthesis of 2-styrylthiazolo4,5-b]quinoxaline based fluorescent dyes was achieved by the condensation of 2-alkylthiazolo4,5-b]quinoxaline with selected 4-N,N-dialkylamino-substituted aryl-aldehydes or hetarylaldehydes in the presence of piperidine or acid anhydride. The coloristic, fluorophoric and dyeing properties of these dyes were studied.