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首先以苯氧乙酰肼和二酰氯为原料反应得到对称双酰肼化合物,再以POCl3合环得到系列对称双-1,3,4-噁二唑化合物。考察了该系列化合物的紫外-可见吸收光谱,其中,间苯双-1,3,4-噁二唑化合物在250nm附近有明显的最大吸收峰,对苯双-1,3,4-噁二唑化合物的最大吸收峰则红移至290nm附近;而脂肪族双-1,3,4-噁二唑化合物没有明显的最大吸收峰,说明没有大的共轭体系,与结构相符合。所有化合物的结构均经元素分析、IR、1H NMR和MS确证。
First, phenoxyacetic hydrazide and diacid chloride were used as starting materials to obtain the symmetrical bis-hydrazide compound, and the series of symmetrical bis-1,3,4-oxadiazole compounds were obtained by cyclization of POCl3. The UV-Vis absorption spectra of the compounds were investigated. Among them, the maximum absorption peak near 250 nm for m-BENZEX-1, 3,4-oxadiazole was observed, The maximum absorption peak of the azole compound red-shifted to near 290nm; however, the aliphatic bis-1,3,4-oxadiazole compound had no obvious maximum absorption peak, indicating that there was no large conjugated system and was in good agreement with the structure. The structures of all compounds were confirmed by elemental analysis, IR, 1H NMR and MS.