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通过酰氯制备异硫氰酸酯,与5-(4-氨基苄基)-2,4-咪唑啉二酮反应合成了含2,4-咪唑啉二酮的N-苯甲酰基-N'-苯基硫脲,然后在三乙胺存在下再与溴丙酮发生碱催化缩合反应以中等以上收率合成了新型含2,4-咪唑啉二酮的4-甲基-3-苯基-2-酰亚胺噻唑啉,它们的化学结构经1H NMR,IR,HR-ESI-MS和化合物3g和4g的X-ray单晶衍射表征,硫脲与溴丙酮的反应机理通过化合物3g和4g的晶体结构得到进一步确证.初步生物活性测定结果表明:部分目标化合物对供试昆虫及菌种显现出良好的抑制活性,如在200 mg/L浓度下化合物3i和4q对小菜蛾的死亡率分别为86%和100%,在50 mg/L浓度下化合物4n对油菜菌核菌的抑制率为82.6%,而它们对油菜和稗草显示出微弱但并不特征的除草活性. 相似文献
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采用高效液相色谱法测定咪唑中2-甲基咪唑和4-甲基咪唑的含量。采用XDB C18色谱柱为分离柱,以pH 3.5的0.05mol·L-1磷酸二氢钾缓冲溶液与甲醇以体积比95比5组成的混合溶液为流动相,流量为1.0mL·min-1,在波长210nm处进行二极管阵列检测。2-甲基咪唑和4-甲基咪唑均在0.10~25.0mg·L-1范围内与其峰面积呈线性关系,检出限(3S/N)分别为20,40mg·kg-1。在1.00,5.00,20.0mg·L-1 3个浓度水平进行加标回收试验,回收率在89.0%~103%之间,测定值的相对标准偏差(n=7)在0.58%~3.0%之间。 相似文献
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用2-硫代-3-正丁基-5-苯基亚甲基4-咪唑啉二酮的-S-烷基化反应合成了2-烷硫基-3-正丁基-5-苯基亚甲基-4H-咪唑啉-4-酮衍生物。探讨了S-烷基化反应的反应条件和所合成化合物的波谱性质。目标产物均为新的化合物,其结构经元素分析,IR,1H NMR和MS确正。 相似文献
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对1,2-二甲基咪唑啉的合成进行了详细研究. 以甲胺水溶液和2-溴乙胺氢溴酸盐(1)为原料进行反应, 在两种原料物质的量之比为5∶1, 缓缓回流12 h的条件下, 得到N-甲基乙二胺(2), N-甲基乙二胺经过乙酸化得到N-甲基-N,N′-二乙酰基乙二胺(3), 然后, N-甲基-N,N′-二乙酰基乙二胺和氧化钙在高温下关环得到1,2-二甲基咪唑啉(4). 并对所得到的产物1,2-二甲基咪唑啉经元素分析, 1H NMR, IR和GC-MS得到了表征. 相似文献
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以1,2:5,6-O-二异丙叉-α-D-呋喃葡萄糖为原料,经过吡啶重铬酸盐(PDC)氧化、NaBH4还原及选择性水解,实现α-D-木糖环向α-D-核糖环的C(3)位羟基构型的转化,然后分别在高碘酸钠氧化作用下得到糖环上C(5)位为醛基的α-D-木糖和α-D-核糖衍生物,它们分别与2,4-咪唑啉二酮-5-膦酸酯及2-硫代-2,4-咪唑啉二酮发生Wittig-Horner反应及Knoevenagel反应,分离得到3对5-核糖或木糖亚甲基-2,4-咪唑啉二酮衍生物顺反异构体,它们的化学结构经1H NMR,IR,MS和X射线单晶衍射确证.初步生物活性测定结果表明:在50μg/mL浓度下,部分目标化合物均对供试菌种显现出一定的抑制活性. 相似文献
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Four new Sm(Ⅲ) ternary complexes with 1-phenyl-2,3-dimethyl-4-acethlpyrazolone-5 (HPDMAP) or 1-phenyl-2,3-dimethyl-4-trichloroacethlpyrazolone-5 (HPDMCP) as the ligand: Sm(PDMAP)3·bipy (A1), Sm(PDMAP)3·phen (A2), Sm(PDMCP)3·bipy(B1) and Sm(PDMCP)3·phen (B2) (Where bipy=2,2′-dipyridyl, phen=1,10-phenanthroline.) were synthesized and identified by elemental analysis. They were characterized by UV and FT-IR spectra analysis. Their luminescence from the solid state were studied. The results show that the fluorescence intensities of B1 and B2 are stronger than those of A1 and A2, but they all have the same order magnitude. As far as A1 and A2, B1 and B2 are concerned, both bipy and phen have affect on the fluorescence intensities of the complexes. 相似文献
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Investigations of 2,4-dimethyl-1,3-pentadiene by variable temperature FTIR spectra have concluded that the compound is a mixture of two kinds of single bond isomer,i.e.,s-traiis and s-cis conformers.The changes of IR band intensities have been recorded at research temperature range.The values of △H° and △S° between two stable conformers have been deduced to be 4.37 kJ/mol and 2.48 J/mol K respectively. 相似文献
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染料敏化纳米薄膜太阳电池中DMPII浓度的优化 总被引:5,自引:0,他引:5
利用超微铂电极和循环伏安法及电化学阻抗谱研究了在1,2-二甲基-3-丙基咪唑碘(DMPII)的3-甲氧基丙腈(MePN)溶液中I3-和I-的氧化还原行为,并对比了由不同浓度的I2和DMPII组成的电解质溶液,其染料敏化纳米薄膜太阳电池(DSCs)的光伏性能. 发现以MePN为溶剂,含1.0 mol•dm-3 DMPII、0.12 mol•dm-3 I2、0.10 mol•dm-3 LiI和0.50 mol•dm-3 4-叔丁基吡啶的电解质溶液,其DSCs的短路光电流密度为16.67 mA•cm-3、开路电压为0.69 V、填充因子为0.70、光电转换效率达8.08%. 相似文献
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A novel benzimidazole derivative, 1,3-dimethyl-2-ferrocenylmethylbenzimidazolium iodide (1) was synthesized and characterized by elemental analysis, MS, IH NMR and IR spectra. Its crystal structure was determined by X-ray single crystal diffraction, and the title compound belongs to monoclinic system with space group P2(1)/c. According to the crystal structure, the quantum chemistry calculation was performed by Gaussian 03 program, and full geometry optimizations of the title compound were carried out with DFT method at B3LYP/6-31G level. Its structure, stability, frontier molecular orbital components and net charge distribution were discussed. 相似文献
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SUN Feng-Mei TIAN Meng-Kui YANG Jing-Hua LIAN Zhao-Xun 《结构化学》2008,27(7):789-792
The title compound trans-4-[(5-(2,4-dichlorophenoxy)-3-methyl- 1-phenyl-1H-pyrazol-4-yl)methyleneamino]- 1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one 3 (C28H23Cl2N5O2, Mr = 532.41) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction analysis. It crystallizes in triclinic, space group P1- with a = 8.9438(4), b = 11.6065(5), c = 14.2215(6)A, α = 112.566(1), β = 92.324(2), γ = 102.91(1)°, V= 1315.65(10) A^3, Z = 2, Dc = 1.344 g/cm^3,μ(MoKa) = 0.282 mm^-1, λ = 0.71073 A, F(000) = 552, the final R = 0.0587 and wR = 0.1578 for 5071 observed reflections (I 〉 2σ(I)). X-ray analysis reveals that the product is a thermodynamically stable trans isomer. Intra- and intermolecular C( 12)-H(12)…O(1) and C(28)-H(28)...O(1)# 1 hydrogen bonds were observed in the title compound. 相似文献