| 摘要 |
Beta-benzimidazole- or benzoxazole-1-(vic-triazol-2-yl)-styrene Optical brightener for cotton, paper, wool, synthetic fibres etc. - (where R1, R2 = H, halogen, opt. substd. (pref. 1-4C) alkyl, alkoxy, cycloalkyl, aryl, aryloxy, alkoxycarbonyl, carbamoyl, CN or CO2H or together form a opt. aromatic ring; R3 = H, halogen, lower alkyl, SO3H; R4 as R1 or R2; R5 = H, opt. substd. (pref. 1-4C) alkyl or aryl or R4, R5 form part of a non-aromatic carbocyclic ring; X = O or NR6, where R6 = H, opt. substd. (cyclo)-alkyl, aryl, carbamoyl, acyl, alkoxycarbonyl, alkyl or arylsulphonyl). |
