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Antipyrine derivatives I (Z = O, S; Z1 = CH2, CH2OCH2; n = 0, 1, 2, 3) were prepared as open-chain crown ether analogs. Thus, refluxing diethylene glycol ditosylate with 4-hydroxyantipyrine and K2CO3 in acetone for 15 h gave I (Z = O, Z1 = CH2OCH2). The activities of I as phase-transfer catalyst for iodination of 1-bromoctane with NaI, or KI were reported. 相似文献
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本文合成了11种以4-氧安替比林为端基的含氮开链冠醚类似物,通过元素分析和波谱鉴定了它们的结构.报道了4-羟基安替比林O-烷基化的新方法.相转移催化性能研究表明,它们可以作为液-液相或固-液相转移的良好催化剂。 相似文献
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几种新的4-酰基吡唑酮类螯合剂的合成 总被引:37,自引:1,他引:36
Eight new 1-phenyl-3-methyl-4-acyl-pyrazolones (1a-f, 2a, b) have been synthesized in good yield by reacting the corresponding acid halide with 1-phenyl-3-methyl-pyrazolone in dioxane in the presence of suspended Ca(OH)2 or Ba(OH)2, the products were identified by elemental analyses, IR, UV and 1H NMR spectra. Preliminary experiments indicate that all of their extraction efficiency for (UO2)2+ in chloroform-water are better than that of PMBP. The relative efficiency is found to be of the following order: 1b, 1d, 1f>1a, 1e>1c, 2a>2b>PMBP. 相似文献
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几种新的4-酰基吡唑啉酮类螯合剂的合成 总被引:41,自引:0,他引:41
4-酰基吡唑啉酮是一类新型的β-双酮型螯合剂.近廿年来,国内外就这类化合物,特别对1-苯基-3-甲基-4-苯甲酰基吡唑啉酮(PMBP)进行了大量的研究工作.PMBP是镧系、锕系和碱土金属元素的优良萃取剂之一,但对一些配位数较高的金属离子,常由于水分子参与配位,萃取效果不佳.例如,PMBP萃取铀酰离子时,由于生成的螯合物中含有两个水分子,具有较大的亲水性,因而分配系数较低.目前对不同取代基的吡唑啉酮的研究还比较少,以1,3-二取代吡唑啉酮为端基的双酰代吡唑啉酮类的合成与 相似文献
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