化学通报(网络版)
化學通報(網絡版)
화학통보(망락판)
Chemistry Online
2015年
1期
1-5
,共5页
1,3,4-噁二唑%合成%表征
1,3,4-噁二唑%閤成%錶徵
1,3,4-오이서%합성%표정
1%3%4-Oxadiazole%Synthesis%Characterization
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250 nm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290 nm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。
首先以苯氧乙酰肼和二酰氯為原料反應得到對稱雙酰肼化閤物,再以 POCl3閤環得到繫列對稱雙-1,3,4-噁二唑化閤物。攷察瞭該繫列化閤物的紫外-可見吸收光譜,其中,間苯雙-1,3,4-噁二唑化閤物在250 nm附近有明顯的最大吸收峰,對苯雙-1,3,4-噁二唑化閤物的最大吸收峰則紅移至290 nm附近;而脂肪族雙-1,3,4-噁二唑化閤物沒有明顯的最大吸收峰,說明沒有大的共軛體繫,與結構相符閤。所有化閤物的結構均經元素分析、IR、1H NMR和MS確證。
수선이분양을선정화이선록위원료반응득도대칭쌍선정화합물,재이 POCl3합배득도계렬대칭쌍-1,3,4-오이서화합물。고찰료해계렬화합물적자외-가견흡수광보,기중,간분쌍-1,3,4-오이서화합물재250 nm부근유명현적최대흡수봉,대분쌍-1,3,4-오이서화합물적최대흡수봉칙홍이지290 nm부근;이지방족쌍-1,3,4-오이서화합물몰유명현적최대흡수봉,설명몰유대적공액체계,여결구상부합。소유화합물적결구균경원소분석、IR、1H NMR화MS학증。
First of all, phenoxyacetic acid hydrazide and di-acyl chloride are used to synthesize dihydrazide compounds, then a series of symmetric bis-1,3,4-oxadiazoles were synthesized by cyclization with phosphorus oxychloride, and their UV-Vis absorption were studied. UV-Vis maximum absorption peak of m-benzene bis-1,3,4-oxadiazole is located at about 250nm, that of p-benzene bis-1,3,4-oxadiazole shows an obvious red shift, located at about 290nm. Alkanoic bis-1,3,4-oxadiazole did not appear any maximum absorption peak, showing there is no conjugated system in molecule, which is consistent with the its molecular structure. The structure of these compounds were confirmed by elemental analysis, IR, 1H NMR and MS.