Ultraviolette Strahlung absorbierende optische Aufheller

摘要

1,189,008. Substituted thiazoles. KODAK Ltd. 26 June, 1968 [27 June, 1967], No. 29656/67. Heading C2C. [Also in Divisions C3, D1 and G2] The invention relates to substituted thiazoles of the general formula in which each of the groups Z1, Z2 and Z3 represents a hydrogen atom, alkyl group, aryl or substituted aryl group, oxazole-2-yl group, benzoxazol-2-yl or substituted benzoxazol-2-yl or substituted benzoxazol-2-yl group or naphthoxazole-2-yl or substituted naphthoxazole-2-yl group and at least two of the groups Z1, Z2 and Z3 are benzoxazole-2-yl or substituted benzoxazol-2-yl groups. Compounds claimed per se are 4 - methyl - 2,5 - di - (5,7 - di - tert - pentyl benzoxazol - 2 - yl)thiazole; 4 - phenyl - 2,5 - di- (5,7 - di - tert - pentyl benzoxazol - 2 - yl) thiazole; 2,5 - di - (5,7 - di - tert - pentyl benzoxazol - 2 - yl) thiazole; 2,4,5 - tri - (5,7 - ditert - pentyl benzoxazol - 2 - yl)thiazole; 2- methyl - 4,5 - di - (5,7 - di - tert - pentyl benzoxazol - 2 - yl)thiazole; 2 - phenyl - 4,5 - di-(5,7- di - tert - pentyl benzoxazol - 2 - yl)thiazole; 4 - phenyl - 2,5 - di - (5 - t - butyl benzoxazole-2- yl)thiazole. In an example, 2-amino-4,6-di-tpentylphenol and calcium oxide were added to 0-diohlorobenzene to which 4-methylthiazole- 2,5-dicarbonylchloride was added and the rapidly stirred mixture refluxed for three hours and 4 - methyl - 2,5 - di - (5,7 - di - t - pentylbenzoxazol- 2-yl)thiazole separated.