Fluoreszierende Farbstoffe

摘要

1386330 Fluorescent dyes BADISCHE ANILIN- & SODA-FABRIK AG 14 June 1972 [15 June 1971] 27793/72 Heading C4P The invention comprises fluorescent dyes of the general formula wherein R is H, C 1 -C 4 alkyl optionally substituted by C 1 -C 4 alkoxy, Cl, Br, COOH, carbalkoxy having up to 4 carbon atoms in the alkoxy group, carbamoyl or acetoxy, or is a cyclohexyl, benzyl or phenylethyl group, R1 is H or C 1 -C 4 alkyl which may be substituted by C 1 -C 4 alkoxy, Cl, Br, COOH, carbalkoxy having up to 4 carbon atoms in 'the alkoxy group, carbamoyl or acetoxy or R and R1 together with the N atom denote a 5- or 6-membered heterooyclic ring, X is -O-, -S-, or -CH=CH-, and Y is H; Cl, Br, CN, NO 2 , carbalkoxy having a total of 2 to 9 carbon atoms, or carbamoyl or sulphamoyl which groups may be mono- or di-substituted and contain up to nine carbon atoms. They are prepared by reacting an optionally N-mono- or N,N-di-substituted 4-aminosalicylaldehyde with a compound of the general formula wherein X and Y are as above, preferably in a solvent at 0-150‹ C. in presence of an inorganic or organic basic condensing agent. The dyes give yellow shades on polyacrylonitrile, polyester and di- and tri-acetate fibres and melamine formaldehyde resins.