双(2-取代-3-羟基-4-吡喃酮)合铜(II)配合物的合成和降血糖作用

合成了双(2-取代-3-羟基-4-吡喃酮)合铜(II)配合物,采用元素分析、质谱、红外光谱、电子光谱、电子自旋共振谱表征了它们为平面正方型配合物,中心离子和配体的物质的量比为1∶2.在STZ-糖尿病小鼠模型上,其中双(2-乙基-3-羟基-4-吡喃酮)合铜(II)在10mg/kg的剂量下灌胃给药,能增加血清胰岛素的合成和分泌、降低糖尿病小鼠的血糖水平,显示出良好的抗糖尿病的作用.该配合物毒性低,对正常小鼠灌胃给药的半数致死量LD50是855.9mg/kg.     

N,N′-双(2-羟基-4-甲氧基二苯酮)乙二亚胺合铜(Ⅱ)、镍(Ⅱ)、钴(Ⅱ)配合物的合成

固液合成;N;N′-双(2-羟基-4-甲氧基二苯酮)乙二亚胺合铜(Ⅱ)、镍(Ⅱ)、钴(Ⅱ)配合物的合成     

(±)-5,3’-二羟基-7,8-(2,2-二甲基吡喃)-4’-甲氧基黄烷酮的首次全合成

以廉价的异香草醛和2,4,6-三羟基苯乙酮为起始原料,经过C-异戊烯基化、环化、选择性的保护酚羟基、羟醛缩合、催化环化等步骤,脱保护基,以6.7%的总收率首次完成了天然吡喃型黄烷酮(±)-5,3’-二羟基-7,8-(2,2-二甲基吡喃)-4’-甲氧基黄烷酮的全合成.所有新化合物的结构都经过IR,1H NMR,MS,HRMS确认.     

一类新的手性β-二酮铜(Ⅱ)配合物合成及性质——Ⅰ. (+)双［1-对烷氧基苯基-3-对-(2′-甲基丁氧基)苯基-1，3-丙二酮］合铜(Ⅱ)

本文合成了一类新的含手性基团的β-二酮铜(Ⅱ)配合物，双［1-对烷氧基苯基-3-对-(2′甲基丁氧基)苯基-1，3-丙二酮］合铜(Ⅱ)，经元素分析、红外光谱及比旋光度测定确定了结构。通过偏光显微镜下相变观察及DSC图谱，证实这些配合物没有液晶性，其原因可能在于分子的对称性不好。     

大空间位阻的2,9-双噻吩-1,10-菲咯啉-5,6-二酮铜(Ⅱ)配合物的研究

基于1,10-菲咯啉-5,6-二酮2,9位双噻吩的扩展策略,设计合成了2个化合物1和2.有趣的是,在大位阻双齿螯合配体2的配位化学研究中发现,只有铜(Ⅱ)离子生成了稳定的配合物3·H₂O.此外,对2,2·CHCl₃和3·H₂O的X-射线单晶结构研究表明,为了克服空间位阻以满足中心铜(Ⅱ)离子的配位构型要求,1,10-菲咯啉-5,6-二酮及其2,9位取代的2个噻吩环之间的二面角分别从自由配体中的1.9(2)°、5.2(6)°和25.3(3)°、34.9(3)°增加到了铜(Ⅱ)配合物中的5.6(2)°、6.5(6)°和27.2(3)°、38.2(3)°.     

双-[一氰乙基化β-二酮基]合铜Ⅱ的合成及其性质

本文通过一氰乙基化β-二酮与醋酸铜作用合成了五个双-[一氰乙基化β-二酮基]合铜(Ⅱ)配合物,并进行了元素定量分析,红外光谱分析、紫外光谱分析,这些配合物是未知的新的配合物。     

二茂铁基β-二酮及其Cu(Ⅱ)、Ni(Ⅱ)配合物的燃速催化性质

合成了含有苯基的二茂铁β-二酮,并对其结构进行了表征.在核磁共振氢谱中,苯环上含有拉电子的硝基时,β-二酮烯醇式含量几乎是100%,而含有给电子的甲氧基时,其烯醇异构体含量下降到84%.当将其与Cu(II)或Ni(II)配位后,在紫外吸收光谱中,300 nm以下归属于Fe(d)-π*和芳基π-π*的跃迁向长波方向移动5~17 nm.热重-差示扫描量热法(TG-DSC)实验表明,添加二茂铁基β-二酮或它们的Cu(II)或Ni(II)配合物于高氯酸铵(AP)中,不仅在一定程度上抑制了AP高温热降解阶段的升华,而且可使AP的热降解温度提前,以Cu(II)配合物提前得更为显著,含有甲氧基的Cu(II)配合物可使AP的热降解温度提前87℃.因此相对于二茂铁β-二酮配体及Ni(II)配合物,Cu(II)配合物是更好的燃速催化剂.     

乙二醛缩双(邻氨基苯酚)合锰(II)配合物的合成及其催化行为研究

合成了乙二醛缩双(邻氨基苯酚)合锰(II)配合物, 讨论了其在DMF中的载氧行为、氧合动力学; 设计正交试验考察了以分子氧为氧源, 该配合物催化氧化醋酸去氢表雄酮生成7-酮基醋酸去氢表雄酮的性能, 最高收率达78.4%.     

双〔取代苯乙酮基β-二酮基〕合铜(Ⅱ)的合成及表征

用取代苯乙酮基β-二酮与醋酸铜作用合成了双[取代苯乙酮基β-二酮基]合铜(Ⅱ)配合物1—3。后者与氨基脲作用,得到相应的缩氨脲4—6。     

(2-(2’-吡啶)苯并咪唑)(L-丙氨酸根)铜(Ⅱ)配合物结构、抗菌活性及DNA断裂作用

设计合成了新的(2-(2’-吡啶)苯并咪唑)(L-丙氨酸根)铜(II)配合物:[Cu(HPB)(L-Ala)(ClO4)(H2O)]2 H2O[HPB=2-(2’-吡啶)苯并咪唑,L-Ala=L-丙氨酸根].应用元素分析、红外光谱、紫外可见光谱、摩尔电导率、电喷雾质谱及X射线单晶衍射等方法对配合物的组成及结构进行了表征.该配合物晶体属单斜晶系,P21空间群,晶胞参数:a=1.1900(2)nm,b=0.80500(16)nm,c=1.9700(4)nm,β=94.78(3)°,Z=2,Dc=1.672 g cm-3,F(000)=968,残差因子R1=0.0427,wR2=0.1106[I>2σ(I)],S=0.999.在配合物分子中,2-(2’-吡啶)苯并咪唑和L-丙氨酸根以双齿配位方式在分子平面上与中心铜(II)离子配位,而水分子及高氯酸根单齿弱配位于分子轴向上,构成了一拉长的八面体结构.利用二倍试管稀释法测定了配合物的抗菌活性,并且研究了配合物对pBR 322 DNA的断裂作用.结果表明,该配合物对枯草杆菌(B.subtilis,G+),金黄色葡萄球菌(S.aureus,G+),大肠杆菌(E.coil,G-)和沙门氏杆菌(Salmonella,G-)具有良好的抑制活性,最小抑菌浓度为50～80μg mL-1,在维生素C存在下能够通过羟基自由基OH氧化断裂pBR 322 DNA双螺旋结构.     

N-substituted salicylaldimine complexes of rhodium(III) and related rhodium(III) organometallic derivatives

A series of new Rh^III complexes with N-substituted salicylaldimines have been prepared of the form [RhSBPy₂]PF₆ where SB is a tetradentate N,N′-substituted bis(salicylaldimine) or represents two molecules of a corresponding bidentate derivative. Several of these complexes have been reduced with 0.5% sodium amalgam and the products reacted with CH₃I to yield the organometallic derivatives CH₃RhSBPy.     

Self-Assembly by Tridentate or Bidentate Ligand: Synthesis and Vapor Adsorption Properties of Cu(II), Zn(II), Hg(II) and Cd(II) Complexes Derived from a Bis(pyridylhydrazone) Compound

Four complexes, [Cu₄L₂(OCH₃)₂(CH₃OH)₂]·2H₂O (1), [Zn₂L₂Cl₄]·2H₂O·2CH₃OH (2), [Hg₂L₂Br₄]·4CH₃OH (3), and {[CdL₂Cl₂]·4H₂O·4CH₃OH}_n (4), have been synthesized and characterized from a bis(pyridylhydrazone) ligand (L) with copper(II), zinc(II), mercury(II) or cadmium(II), respectively. Complex 1 exists as a centrosymmetric tetranuclear dimer with L as deprotonated tridentate ligand. Complexes 2 and 3 exist as centrosymmetric metallamacrocycles with L as bidentate ligand. Complex 4 exists as a 1D looped-chain coordination polymer. The thermal stabilities and vapor adsorption properties of the four complexes were investigated as well.     

Synthesis of new mixed ligand complexes of copper(II) dithiocarbamates

New mixed ligand complexes of copper(II) dithiocarbamates of the general formula, [CuCl(R₂dtc)L] or [CuCi(R′ dtc)L] (RCH₃ or C₂H₅, R′ = (CH₂)₅, dtc =-NCSS^? and L = Pyridine, 3-picoline or 4-picoline), have been prepared by the reaction of bis(dithiocarbamato)di-μ-chloro-dicopper(II) complexes with pyridine or picolines. The complexes are found to be non-electrolytes in nitrobenzene. Magnetic susceptibilities, i.r. and electronic spectra of the complexes are reported. A psuedo-tetrahedral structure is suggested for these complexes.     

Two new oximate‐bridged square‐planar dinuclear nickel(II) complexes

The synthesis and characterization of two new dinuclear nickel(II) complexes, namely bis{μ‐3‐[2‐(dimethylamino)ethylimino]butan‐2‐one oximato}dinickel(II) bis(perchlorate) acetonitrile solvate, [Ni₂(C₈H₁₆N₃O)₂](ClO₄)₂·CH₃CN, (I), and bis{μ‐3‐[2‐(dimethylamino)ethylimino]‐3‐phenylpropan‐2‐one oximato}dinickel(II) bis(perchlorate), [Ni₂(C₁₃H₁₈N₃O)₂](ClO₄)₂, (II), are reported. Single‐crystal X‐ray analyses of the complexes reveal that the nickel(II) ions are in square‐planar N₃O environments and form six‐membered (NiNO)₂ metallacycles. The cation in (II) possesses crystallographically imposed inversion symmetry.     

Synthesis,characterization, and antimicrobial activities of two mononuclear metal(II) complexes with (Z)-3-hydroxy-4-(3-hydroxy-3-phenylacryloyl)phenyl benzoate

Two mononuclear complexes with a β-diketone ligand (Z)-3-hydroxy-4-(3-hydroxy-3-phenylacryloyl)phenyl benzoate (L), [CoL₂(CH₃CH₂OH)₂] (1), and [MnL₂(CH₃CH₂OH)₂] (2) were prepared. Both complexes were characterized by X-ray crystallography, confirming that the central metal(II) are coordinated by four oxygens from two L and two oxygens from two ethanols. Both complexes were assayed for in vitro antibacterial (Bacillus subtilis, Staphylococcus aureus, Streptococcus faecalis, Pseudomonas aeruginosa, Escherichia coli, and Enterobacter cloacae) activities and showed better antimicrobial activity against Gram positive strains than Gram negative strains.     

Synthesis,Characterization and Structure of Bis‐ and Tetrakis‐Aziridine‐Nickel(II) and Copper(II) Complexes

The synthesis and characterization of mononuclear tetrakis‐aziridine nickel(II ) and copper(II ) complexes as well as of a dinuclear bis‐aziridine copper(II ) complex are described. The reactions of anhydrous MCl₂ (M = Ni^II, Cu^II) with aziridine (= az = C₂H₄NH, C₂H₃MeNH, CH₂CMe₂NH) in CH₂Cl₂ at room temperature in a 1:5 and 1:2 molar ratio, respectively, afforded the tetrakis‐aziridine complexes [M(az)₄Cl₂] (M = Ni, Cu) or the dimeric bis‐aziridine complex [Cu(az)₂Cl₂]₂. After purification, all of the complexes were fully characterized. The single crystal structure analysis revealed two different coordination modes. Whereas both nickel(II ) complexes can be classified as showing an elongated octahedral structure, copper(II ) complexes show either an elongated octahedral or a square pyramidal arrangement forming dimers with chlorido bridges in axial positions. Furthermore, the results of magnetic measurements of the nickel(II ) and copper(II ) compounds are presented.     

Synthesis and characterization of copper(II), cobalt(II), nickel(II), and iron(III) complexes with two diamine Schiff bases and catalytic reactivity of a chiral diamine cobalt(II) complex

New transition metal complexes of Co(II), Cu(II), Ni(II), and Fe(III) of the ligands 6,6′-(1E,1′E)-(4,5-dimethyl-1,2-phenylene)bis(azan-1-yl-1-ylidene)bis(methan-1-yl-1-ylidene)bis(7-hydroxy-5-methoxy-2-methyl-4H-chromen-4-one) H₂L¹ and 6,6’-(1E,1′E)-cyclohexane-1,2-diylbis(azan-1-yl-1-ylidene)bis(methan-1-yl-1-ylidene)bis(7-hydroxy-5-methoxy-2-methyl-4H-chromen-4-one) H₂L² have been prepared and characterized using physio-chemical and spectroscopic methods. The results obtained for the complexes indicated that the geometries of the metal centres are either square planar or octahedral. Cyclopropanation reactions of unactivated olefins by ethyldiazoacetate (EDA) in the presence of [L¹Cu]·H₂O, [L²Cu]·2H₂O and [L²*Co]·2H₂O as catalysts were examined. The results showed that only [L²*Co]·2H₂O can act as a catalyst for the cyclopropanation reaction of unactivated olefins with very high selectivity (up to 99% based on EDA).     

Synthesis and characterization of ruthenium(ii) complexes of 5-hydroxyflavones

Bis(dimethyl sulfoxide)bis(flavonato)ruthenium(II) complexes, RuL₂(DMSO)₂, were synthesized by the reaction of dichlorotetrakis(dimethyl sulfoxide)ruthenium(II) with the sodium salts of 5-hydroxyflavone, 5-hydroxy-4′-methoxyflavone and 5-hydroxy-3′,4′,5′,7-tetramethoxyflavone, ( L ). The complexation was followed by ¹H nmr spectroscopy. The 1:1 kinetically favoured tris(dimethyl sulfoxide)chloroflavonatoruthenium(II) complexes, RuLCl(DMSO)₃, were initially formed and then transformed into the thermodynamically more stable ones. Each one of these complexes, by reacting with another equivalent of lig-and L, also gave rise to a mixture of 1:2 kinetic species, from which the 1:2 thermodynamically more stable bis(dimethyl sulfoxide)bis(flavonato)ruthenium(II) complexes, RuL₂(DMSO)₂, were formed. The complexes were characterized by extensive studies involving ¹H, ¹³C nuclear magnetic resonance, infrared and ultraviolet-visible spectroscopy, mass spectrometry, cyclic voltammetry and elemental analysis. Such 1:2 complexes exhibited properties of two nonequivalent flavonate ligands and also of two non-equivalent dimethyl sulfoxide ligands; one of these dimethyl sulfoxide ligands is considered to be S-bonded and the other O-bonded. Also two quasireversible one-electron redox steps were observed at 0.53 to 0.57 and 0.44 to 0.41 V (vs Saturated Calomel Electrode). The spectroscopic results obtained allow for the discussion of stereochemistry of each bis(dimethyl sulfoxide)bis(flavonato)ruthenium(II) complex and to postulate its possible structure as one corresponding to the more anisochronous species.     

Synthesis,structural characterization and catalytic activities of dicopper(II) complexes derived from tridentate pyrazole‐based N2O ligands

A group of a diverse family of dinuclear copper(II) complexes derived from pyrazole‐containing tridentate N₂O ligands, 1,3‐bis(3,5‐dimethylpyrazol‐1‐yl)propan‐2‐ol (Hdmpzpo), 1,3‐bis(3‐phenyl‐5‐methyl pyrazol‐1‐yl)propan‐2‐ol (Hpmpzpo) and 1,3‐bis(3‐cumyl‐5‐methylpyrazol‐1‐yl)propan‐2‐ol (Hcmpzpo), were synthesized and characterized by elemental analysis, IR spectroscopy and three of them also by single‐crystal X‐ray diffraction. Three complexes, [Cu₂(pmpzpo)₂](NO₃)₂·2CH₃OH ( 3 ·2CH₃OH), [Cu₂(pmpzpo)₂](ClO₄)₂ ( 4 ) and [Cu₂(cmpzpo)₂](ClO₄)₂·2DMF ( 7 ·2DMF), each exhibits a dimeric structure with a inversion center being located between the two copper atoms. The metal ion is coordinated in a distorted square planar environment by two pyrazole nitrogen atoms and two bridging alkoxo oxygen atoms. Both complexes 1 ·CH₃OH·H₂O and 3 ·2CH₃OH were investigated in anaerobic conditions for the catalytic oxidation of 3,5‐di‐tert‐butylcatechol (3,5‐DTBC) to the corresponding quinone (3,5‐DTBQ), for modeling the functional properties of catechol oxidase. Copyright © 2007 John Wiley & Sons, Ltd.     

Synthese,spektroskopische Charakterisierung und bakterizide Wirksamkeit neuer Organylbis(thiophenolato)bismut(III)-Komplexe

New Organobis(thiophenolate)bismuth(III) derivatives C₆H₅Bi(SC₆H₄Cl-p)₂ (I), Ch₃Bi(SC₆H₄NH₂-p)₂ (II) and CH₃AS(SC₆H₄NH₂-p)₂ (III) can be prepared by the reaction of phenyldibromobismuth(III), methyldibromobismuth(III) and -arsenic(III), respectively, with stoichiometric amounts of lithium-p-chlorothiophenolate (for I), and lithium-p-aminothiophenolate. II reacts with an excess of iodomethane to form the bis(mercaptoanilinium) complex [CH₃Bi(SC₆H₄NH₂CH₃-p₂]²⁺ (I⁻)₂ (IV). Treating IV with adequate amounts of AgNO₃ or TINO₃ yields the analogous nitrate derivative [CH₃Bi(SC₆H₄NH₂CH₃-p)₂]²⁺ (NO₃⁻)₂ (V). The new compounds were characterized by elemental analysis, ¹H NMR, IR and mass spectroscopy and some of the compounds were also characterized by vapour pressure molecular weight osmometry too.The microbiological effect of the organometallic arsenic(III)- and bismuth(III)-bis(thiolates) I-IV was studied, the bismuth compounds generally inhibited bacterial growth more than the arsenic derivative. The aminothiophenolate complexes II and IV in particular were not inferior to the well-known organothiolatomercury(II) complexes with regard to their inhibition of bacterial growth. The hydrophilic mercaptoanilinium derivative IV has potential as a novel bactericide.