4,5-咪唑双酰腙的合成与表征

以酒石酸为原料，经成环制酸、酯化、肼解、与芳香醛缩合，制备了7个4，5－咪唑双酰腙，并用元素分析，IR，^1H NMR,^13C NMR对它们的结构进行了表征。实验结果表明，酰肼与芳香醛在冰醋酸中进行缩合酰腙化一步，具有反应快速、产率高、条件温和、操作简便等优点。     

对苯双酰腙类化合物的合成与表征

以对苯二甲酸为起始原料,设计合成了5个新型的对苯双酰腙类化合物,其结构经1H NMR,MS和元素分析表征。     

含1,2,4-三唑酰腙类化合物的合成、结构表征及生物活性

以取代羧酸为起始原料,经多步反应,设计合成12个中间体及16个2-(3-取代-4-氨基-1,2,4-三唑-5-硫基)乙酰腙类化合物,中间体2a~2d,3a~3d及目标产物4a~4p均为新化合物.借助IR,NMR,元素分析等方法对所合成的中间体和目标产物结构进行了表征;目标产物存在trans/cis异构体,室温下以trans异构体形式为主.生长素活性测试结果表明,目标化合物对小麦芽鞘有着不同程度的生长调节作用;同样,目标化合物对供试细菌也具有抑制作用,且对金黄色葡萄球菌的抑制作用明显优于对大肠杆菌的抑制作用,其中化合物4h的抑菌活性最好,对金黄色葡萄球菌的最低抑菌浓度(MIC)达到3.13μg/mL,与对比药物氯霉素接近.     

偶苯酰双缩吡啶酰腙的合成及其结构表征

合成了Schiff碱化合物偶苯酰双缩吡啶酰腙;利用元素分析、红外光谱、紫外光谱和X射线单晶衍射等手段对其结构进行了表征.结果表明,标题化合物属于单斜晶系,P21/n空间群;晶胞参数为:a=0.8481(2)nm,b=0.5934(1)nm,c=2.1912(3)nm,β=94.331(3)°,V=1.0996(3)nm3,Z=2,Dc=1.355g/cm3,μ=0.090mm?1,F(000)=468,R1=0.0381,wR2=0.0628.分子内氢键N-H…N作用有利于稳定化合物的分子结构,而晶体堆积过程中通过分子间π-π作用和C-H…π作用形成三维超分子结构.     

香草醛—N—酰腙类化合物的合成与表征

Ｓｃｈｉｆｆ碱类化合物和酰腙类化合物大多具有除草,杀菌等生物活性,已有一些报道［１,２］,对该类化合物的深入研究是当今农药界热点之一,表明此类化合物具有广阔的开发前景。据文献报道［１］,香草醛与芳胺反应生成的Ｓｃｈｉｆｆ碱类化合物具有优异的促进植物生根性。为寻求新的具有生物活性的物质,我们采用香草醛与酰肼反应,合成了３种未见报道的酰腙类化合物。其结构经ＩＲ,１ＨＮＭＲ和元素分析证实。合成反应如下：３—ＣＨ３Ｏ—４—ＨＯＣ６Ｈ３ＣＨＯ＋Ｈ２ＮＮＨＣＯ—Ｒ３—ＣＨ３Ｏ—４—ＨＯＣ６Ｈ３ＣＨＮＮＨＣＯ…     

3,4,5-三甲氧基苯甲酰腙类化合物的合成与表征

以没食子酸为原料。经烷基化、肼解得3,4,5-三甲氧基苯甲酰肼(2),2与芳香醛进行缩合反应合成了9个新的酰腙化合物。其结构经元素分析。IR,1H NMR和MS表征。     

新型蒎酸基双酰腙类化合物的合成及其除草活性

以α-蒎烯为原料,经氧化和溴仿反应制得蒎酸(3)。在HATU作用下,3和Boc肼发生N-酰化反应得含Boc保护基的蒎酸基双酰肼(4);4脱除Boc保住基得蒎酸基双酰肼(5);5与取代苯甲醛经缩合反应合成了6个新型的蒎酸基双酰腙类化合物(6a~6f),其结构经1H NMR,13C NMR,IR,ESI-MS和元素分析表征。初步的除草活性测试表明,6a~6f在用药量为100μg·mL-1时对油菜胚根生长具有一定的抑制作用,其中蒎酸基双苯酰腙(6b)和蒎酸基双对氟苯酰腙(6d)的抑制率分别为70.1%和73.2%。     

5-溴水杨醛硫代双酰腙及其Cu(Ⅱ)配合物的合成、表征及抑菌活性

5-溴水杨醛硫代双酰腙及其Cu(Ⅱ)配合物的合成、表征及抑菌活性     

4种含羧基酰腙化合物的合成、表征和抑菌活性

4种含羧基酰腙化合物的合成、表征和抑菌活性;酰腙;合成;表征;抑菌活性     

5-溴水杨醛硫代双酰腙及其Cu(Ⅱ)配合物的合成、表征及抑菌活性

5-溴水杨醛硫代双酰腙及其Cu(Ⅱ)配合物的合成、表征及抑菌活性     

1-甲基-1-乙基-3-丁烯基环戊二烯基稀土二氯化物的 合成与表征

报道了1-甲基-1-乙基-3-丁烯基环戊二烯基稀土二氯化物的合成。用元素分析、质谱、红外光谱和核磁共振表征了这类配合物的组成为[C~5H~4C(CH~3)(C~2H~5)CH~2CH＝CH~2]LnCl~2·MgCl~2·THF[Ln=La(1),Nd(2),Sm(3),Gd(4)]。     

2,5-二酮哌嗪衍生物的一锅法合成及其细胞毒活性

以DMF为溶剂,Cs₂CO₃为碱, N,N-二乙酰基-2,5-二酮哌嗪,芳醛和卤代烷经一锅法合成了１10个2,5-二酮哌嗪类衍生物（4a~4j,其中4c, 4f和4i为新化合物）,收率54.2％～75.7％,其结构经¹H NMR, ¹³C NMR和ESI-MS确证。生物活性研究结果表明：（Z）-1-乙酰基-3-（1-亚甲基萘）-4-烯丙基-2,5-二酮哌嗪（4c）对U937, Hela和Du145等细胞具有一定的细胞毒活性。     

萘并呋喃类化合物的染料化光氧化及其杂环衍生物的合成与表征

萘并呋喃类化合物1、7在四苯基卟啉存在与氧低温反应给出相应的二氧杂环丁烷类产物2、8，室温下分别全部分解成乙酰基乙酰氧基化合物4、9。2和盐酸作用可给出呋喃3-位甲基及所在萘半环β位的二氯代产物6。4与盐酸反应通过失去萘α位的酰基，形成羟基呋喃化合物3，1在三溴化硼酸解下亦可得同一产物。4在醋酸钠/酸酐中环构生成3-乙酰基吡喃酮(5)。     

聚2,5-呋喃二甲酸乙二醇酯的合成与表征

以2,5-呋喃二甲酸和乙二醇为原料,草酸亚锡为催化剂,通过直接酯化法合成了线性高分子量聚2,5-呋喃二甲酸乙二醇酯(PEF).运用红外光谱(FTIR)和核磁共振氢谱(1H-NMR)表征了该聚酯的结构;由乌氏黏度计法和凝胶渗透色谱(GPC)建立了该聚酯在一种混合溶剂体系中特性黏数和重均分子量的关系:[η]=2.82×10-6Mw0.99dL/g,25℃,苯酚-四氯乙烷(1∶1,W/W);示差扫描量热法(DSC)和热失重分析(TGA)测定了该聚酯的热转变性能,结果表明该聚酯玻璃化转变温度为84℃,熔点为211℃,起始热分解温度高于370℃,具有良好的热稳定性;运用旋转流变仪研究了PEF的流变性能,结果表明,PEF熔体属于假塑性流体,随相对分子量的减小和温度升高,其非牛顿指数增大,在高于PEF熔点20～40℃,剪切速率为2.17×10-2～1.14×102s-1时,PEF的非牛顿指数为0.85左右.     

Syntheses and Crystal Structure of Six－coordinated Diorgnotin Complexes with 2,5－Dimercapto－4－phenyl－1,3,4－thiodiazole

The reactions of diorganotin dichloride [Ph_2SnCl_2, (PhCH_2)_2-SnCl_2 or (n-Bu)_2SnCl_2] with potassium salt of 2,5-dimercapto-4-phenyl-1, 3, 4-thiodiazole gave complexes R_2Sn (S_3N_2C_8H_5)_2(4: R=Ph; 5: R=PhCH_2 and 6: R=n-Bu), respectively.Characterizations were carried out for all complexes by IR, ~1HNMR spectra and X-ray crystallography analysis. Including theSn…N interaction, the three complexes all have six-coordinateddistorted octahedral geometry. Based on the requence of stereo-chemical constraint sequence, phenyl≈benzyl>n-butyl, the lessthe effect of the stereochemical constraint of R groups, the     

Syntheses,Structures and Magnetic Properties of Two Co(II) Coordination Polymers with 2,5-Pyridine Dicarboxylic Acid

1 INTRODUCTION Studies on the system comprising ions with un-quenched orbital angular moment have been ofinterest for many years in the design of new mole-cular magnetic materials[1～5], among which thecompounds of cobalt (II) ions are especially attrac…     

Syntheses and characterizations of heteroatom-containing open-framework aluminophosphates

Two heteroatom-containing open-framework aluminophosphates, (C(3)H(4)N(2))(2)FeAl(3)P(4)O(16) and (C(3)H(4)N(2))(2)CrAl(3)P(4)O(16) (denoted as MAPO-CJ50, M = Fe, Cr), have been synthesized by using imidazole as the template under solvothermal conditions. The structure of FeAPO-CJ50 is determined by single-crystal X-ray diffraction, and its analogous structure CrAPO-CJ50 is identified by powder X-ray diffraction. The 3-dimensional framework of MAPO-CJ50, constructed by MO(4)N(2) octahedra, AlO(4) tetrahedra, and PO(4) tetrahedra, contains interconnecting 10- and 8-ring channels. Imidazole molecules are coordinated with framework M(3+) ions and interact with each other through π-π stacking interactions in the channels. These two compounds show photoluminescent properties due to ligand-to-metal charge transfer. Magnetic measurements reveal that there are antiferromagnetic interactions between M(3+) ions in the frameworks of FeAPO-CJ50 and CrAPO-CJ50.     

Syntheses and characterizations of transition metal-doped ZnO

The transition metal-doped zinc oxides, Zn_1?xM_xO (M = Cu, Mn and Fe) were synthesized by using solid-state reaction method and co-precipitation method. Samples prepared by co-precipitation method showed exactly same structure and properties compared to those made by solid-state reaction method. XRD, XRF and mapping analyses showed that Zn was successfully substituted with Cu, Mn and Fe by co-precipitation method. Zn_1?xM_xO samples exhibited new absorption shoulder in visible light region so that they showed photocatalytic activity in the visible light region. The highest photocatalytic activity under visible light was found in the Mn-substituted zinc oxide.     

Syntheses and characterizations of a novel 1,2,3,4-tetrahydroquinazoline and a Co(III) complex

The 2-furan-2-yl-1,2,3,4-tetrahydroquinazoline-2-carbaldehyde oxime (HL) and complex of tridentate ligand containing oxime, imine, and amine donors resulting from reactions with cobalt(II) salt have been synthesized and characterized by spectral methods (FT-IR, NMR, UV-Vis, mass), elemental analysis, magnetic susceptibility, molar conductivity, and thermal analysis (TG, DTA) techniques. The molecular structure of HL was elucidated from single-crystal X-ray diffraction. X-ray crystallographic analysis shows that the molecule crystallizes in the monoclinic system, space group C2/c. In the complex, chloride was not coordinated as confirmed by conductivity measurements. The metal is coordinated to the oxime, imine, and amine nitrogen atoms and decomposes with loss of the organic ligand and halogen to leave metal oxide. The metal to ligand ratio was 1?:?2 by elemental analysis and mass spectrum.     

Syntheses and properties of donor-acceptor-type 2,5-diarylthiophene and 2,5-diarylthiazole

[structure: see text] Syntheses of differently substituted 2,5-diarylthiophenes and 2,5-diarylthiazoles are carried out with the palladium-catalyzed C-H substitution reaction using AgF as an activator. Remarkably strong photoluminescence is observed in 2,5-diarylthiophene. Differences between the physical properties of liquid crystalline characteristics and cyclic voltammograms of thiophene and thiazole are also studied.