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报道了室温超声辐射下, 水相中通过乙酰乙酸甲酯、盐酸羟胺和芳香醛的三组分一锅反应, 合成了一系列3-甲基-4-芳亚甲基-异噁唑-5(4H)-酮衍生物. 在超声波辐射下, 参与反应的醛无论芳环上连有吸电子基或供电子基, 该一锅反应在室温下都能较好地进行; 对于α,β-不饱和醛、杂环芳醛以及二元芳醛与乙酰乙酸甲酯、盐酸羟胺的一锅反应也能在室温下顺利进行, 获得中等以上的收率. 产物的结构通过元素分析, IR, 1H NMR及单晶解析表征. 该方法具有操作简单和环境友好等优点. 相似文献
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The title Schiff base compound (C11H8N4O), a derivative of pyrazole, has been synthesized by the reaction of salicylaldehyde and 3-amino-4-cyanopyrazole in absolute ethanol and characterized by elemental analyses, IR, ^1H NMR and X-ray single-crystal diffraction. The crystal belongs to the monoclinic system, space group P21/n, with a = 7.5594(7), b = 18.3342(19), c = 22.461(2) A^°, β = 98.419(2)°, V = 3079.5(5) A^°3, Mr = 212.21, Z = 12, F(000) = 1320, Dc = 1.373 g/cm^3, T = 298(2) K, 2 = 0.71073 A^°, the final R = 0.0571 and wR = 0.0493. A total of 5412 unique reflections were collected, of which 1612 with I 〉 2σ(I) were observed. The molecular structure adopts a trans configuration about the C=N double bond. The preliminary biological tests show that the compound has high antibacterial activities. 相似文献
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