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本文讨论了 2 ( 2 取代苯基丙烯基 )苯并唑类化合物的合成方法以及取代基对产率的影响 ,并用IR ,NMR ,MS ,FL等光谱方法对它们进行了结构表征。初步探讨了取代基对各种光谱的影响。结果表明 ,取代基对苯并唑环的特征红外吸收有影响但没有明显的线性规律 ,吸电子取代基对分子中丙烯氢和甲基的化学位移影响明显 ,取代的标题化合物的质谱易出现较强的双正离子碎片。同时讨论了有关紫外光谱和荧光光谱的一些实验现象。
In this paper, the synthesis of 2 (2-substituted phenylpropenyl) benzoxazoles as well as their influence on the yield were discussed. Their structures were characterized by IR, NMR, MS, FL and other spectroscopic methods. The effects of substituents on various spectra were discussed preliminarily. The results showed that the substituent had no effect on the characteristic infrared absorption of the benzoxazole ring, but there was no obvious linear rule. The electron-withdrawing substituent had obvious influence on the chemical shift of propylene and methyl in the molecule, and the mass spectrum of the substituted title compound appeared easily Strong bismuth fragments. At the same time, some experimental phenomena about UV spectrum and fluorescence spectrum were discussed.