OXADIAZOLE DERIVATIVE AND ITS PRODUCTION

摘要

PURPOSE:To provide the novel compound having high luminous brightness and stable film formability and useful as an electoluminescent element or fluorescent brightener. CONSTITUTION:The compound of formula I (Ar is alkyl, aryl, heterocyclic aromatic ring). The compound of formula I is obtained by reacting a compound of formula II with a compound of formula: ArCOX (X is halogen) in the presence of a basic catalyst (e.g. triethylamine) in a solvent (e.g. N,N- dimethylformamide) at room temperature to 150 deg.C and subsequently subjecting the produced compound of formula III to a dehydrative ring-closing reaction in the presence of a dehydrating agent (e.g. oxophosphorus chloride). The compound of formula: ArCOX is used in an amount of 2-3 moles per mole of the compound of formula II, and the dehydrating agent is also used in an amount of 0.1-10 moles per mole of the compound of formula III. The compound of formula I can be formed into a thin film e.g. by a vacuum deposition method, a solution-coating method, etc., and nipped with an anode and a cathode to form the element.