| abstract |
Bis-oxadiazolyl-naphthalenes of the general formula <IMAGE> in which X and X1, which may be the same or different, denote the radicals <IMAGE>, where R is hydrogen, alkyl, alkenyl, haloalkyl, hydroxyalkyl, alkoxyalkyl, aryloxyalkyl, alkylmer captoalkyl , Arylmercaptoalkyl, lower dialkylaminoalkyl, trialkylammoniumalkyl, cycloalkyl or phenyl, which can be substituted by further radicals, the α- or β-naphthyl radical, the benzyl or phenethyl radical or a hetaryl radical and the naphthalene nucleus can also carry further non-coloring radicals. These connections narrow as optical brighteners. |