新型手性Schiff碱的合成及其在硫醚不对称氧化反应中的应用

从(R)-BINOL出发,经4步反应合成了一种新型手性Schiff碱配体--(R)-1-(2-羟基萘-1-基)-3-{[(R)-1-苯基乙亚胺]甲基}萘-2-酚(4),其结构经1H NMR,13C NMR,IR和MS表征.以CCl4为溶剂,4/Ti(O-i-Pr)4/异丙基过氧化氢(2.0 eq)为催化体系,于0 ℃反应9 h的最佳反应条件下,产物甲基苯基亚砜的收率77%,66%ee.     

邻氨基苯酚Schiff碱多核配合物的合成与表征

合成了3-羧基水杨醛缩邻氨基苯酚Sch iff碱及其三核铜,三核镍配合物.用质谱分析,核磁共振,红外光谱,元素分析对配体和配合物的结构进行了表征.磁性研究表明,这两种配合物的金属离子间均存在着较强的反铁磁性自旋交换相互作用.     

手性席夫碱及其金属配合物作为手性催化剂的某些应用

简要介绍和评述了近15年来手性Schiff碱及其金属配合物作为手性催化剂, 在不对称氢化、不对称氢转移、不对称氢硅化、不对称硅氰化和不对称氢氰化等反应中的应用研究进展.     

Chiral Ruthenium-Oxo Complexes for Enantioselective Epoxidation of trans-Stilbene

Two oxoruthenium(IV) complexes containing C₂ symmetric 1,1′-biisoquinoline (biqn) and (R,R)-3,3′-(1,2-dimethylethylenedioxy)-2,2′-bipyridine (diopy*) were prepared, and both are active oxidants for alkene epoxidations. The oxidation of styrene and cis- and trans-β-methylstyrenes by [(Cn)(diopy*)-Ru^IV(O)](ClO₄)₂ did not proceed enantioselectively, but the same oxidant can attain a moderate enantioselectivity of 33%ee for the trans-stilbene oxidation to trans-stilbene oxide. A head-on approach model, where the C=C is directed from the top to the O=Ru moiety, is proposed to account for the facial differentiation of the trans-stilbene oxidation.     

异烟酰肼缩水杨醛Schiff碱配合物的合成与表征

采用直接合成法用异烟酰肼、水杨醛合成了异烟酰肼缩水杨醛Schiff碱,并以此为配体合成了Zn（Ⅱ）、Co（Ⅲ）、Ni（Ⅱ）的配合物．对配合物进行了元素分析,红外光谱,紫外光谱,差热-热重分析及摩尔电导的测试等表征,推测配合物的组成分别为[Zn（H2O）L],[Co（H2O）2（HL）2]NO3-H2O,[Ni（H2O）2HL]NO3,其中L=C13 H9O2N3．     

新型双核锌席夫碱配合物的合成及其结构表征

新型双核锌席夫碱配合物的合成及其结构表征;席夫碱; 双核锌配合物; 合成; 谱学表征; 构象分析     

杂环苄基锡氨基硫脲席夫碱配合物的合成与表征

二苄基二氯化锡和三苄基氯化锡分别与水杨醛缩氨基硫脲,含羟基芳香醛(酮)缩氨基硫脲的席夫碱钠盐反应,合成了10种新的有机锡配合物,其结构经1H NMR,119Sn NMR,IR和元素分析表征。结果表明,中心锡原子均为五配位杂单环结构。     

Synthesis of New Chiral Palladium Complexes with Multidentate Camphor Schiff Bases

New enantiomerically pure Schiff bases have been synthesized starting from (–)-3-bromocamphor and ethylenediamine, and their palladium chelates have been obtained.     

席夫碱冠醚及其稀土硝酸盐配合物的合成与表征

席夫碱冠醚及其稀土硝酸盐配合物的合成与表征;结构     

Synthesis,Spectral Characterization,Antitumor, Antioxidant,and Antimicrobial Studies of New Potential ONS Schiff Base Complexes

Novel Co(II), Ni(II), Cu(II), and Zn(II) complexes derived from 2‐aminopyridine‐3‐thiol and 4‐oxo‐4H‐chromene‐3‐carbaldehyde were synthesized and characterized by spectroscopic (IR, ¹H NMR, UV–vis, ESR, and MS) and other analytical methods. Molar conductance data and magnetic susceptibility measurements provide evidence for the monomeric and monobasic nature of the complexes. The molar conductance measurement of the complexes in DMSO corresponds to their non‐electrolytic nature. All the complexes are of high‐spin type. On the basis of the different spectral studies, the six‐coordinated geometry may be assigned for all the complexes. IR spectral studies indicate the binding sites of the ligand with the metal ion. The Schiff base acts as tridentate ligand coordinated through deprotonated thiolic (SH) sulfur, azomethine (─CH═N─) nitrogen, and carbonyl (−C═O) oxygen atoms. The ligand field parameters were calculated for Co(II) and Ni(II) complexes and their values were found to be in the range reported for an octahedral structure. The data show that the complexes have an ML₂‐type composition. The activation thermodynamic parameters are calculated using the Coast–Redfern, Horowitz–Metzger (HM), Piloyan–Novikova (PN), and Broido equations. The X‐ray diffraction data suggest a triclinic system for all compounds. Different surface morphologies were identified from SEM micrographs. Human tumor cell lines A427 (lung cancer cell line), LCLC‐103H (large cell lung cancer), SISO (uterine adenocarcinoma), and 5637(human bladder carcinoma) grown in RPMI‐1640 medium were elevated. The biological screening data show that the complexes show growth inhibitory activity against various microorganisms. The octahedral geometry of the complexes is confirmed using density functional theory (DFT) from DMOL³ calculations, electronic and magnetic moment measurements, ESR, and ligand field parameters.     

新型联邻甲苯胺类Schiff碱及其金属配合物的合成与表征

用固液相法合成了新型联邻甲苯胺双缩水杨醛和单缩水杨醛Schiff碱配体(L<,1>和L<,2>).L<,1>分别与金属离子[M=Cu(Ⅱ),Ni(Ⅱ),Co(Ⅱ)]配合,合成了三个新型的Schiff碱配合物ML<,1>.L和ML<,1>的结构经<'1>H NMR,IR及元素分析表征.用UV-Vis研究了L和ML<,1>...     

Schiff碱铁配合物催化环己烯环氧化

合成了一种吡啶甲醛类Schiff碱铁配合物[Fe(PA2OPd)C12]Cl,并考察了配合物对环己烯绿色环氧化反应的催化活性及反应条件,结果表明:吡啶甲醛类Schiff碱铁配合物对环己烯的环氧化反应有比较高的催化活性及选择性.以过氧化氢为氧源、[Fe(PA2OPd)C12]Cl为催化剂、在pH=5.0左右的乙酸乙酯溶液中25℃反应6.0 h,环己烯转化率可达90.5%,环氧环己烷选择性可达97.2%.     

新型手性Schiff碱的合成

从手性联萘酚出发,经四步反应合成了一种水杨醛类衍生物(4); 4与(1S,2R)-(+)-2-氨基-1,2-二苯基乙醇反应合成了一种新型手性Schiff碱(6); 6经NaBH4还原制得其类似物.其结构经1H NMR和IR表征.     

混合二烃基二氯化锡与水杨醛缩苯胺类Schiff碱配合物的合成和表征

由混合二烃基二氯化锡与水杨醛缩苯胺类Schiff碱反应,合成了24种新的有机锡配合物。经元素分析、NMR、TG-DSC测定和X射线粉末衍射分析,确定有14种是有机锡与Schiff碱的1:1配合物,10种是1:2配合物。配体是以酚羟基氧原子与锡原子配位,摩尔电导率测定表明这些配合物均为非电解质。     

大环Schiff碱化合物的合成、表征及其荧光活性研究

含乙酰丙酮类大环Schiff碱化合物一般都具有良好的荧光活性．采用模板合成法,用对苯二胺与乙酰丙酮反应合成得到的Schiff碱配体（H2L）与烷基二胺（即1,2-乙二胺,1,3-丙二胺,1,4-丁二胺）反应合成了3种新型大环Schiff碱化合物,通过元素分析,^1H NMR,IR,MS,UV,摩尔电导等手段对合成得到的化合物进行了组成和结构表征,同时在DMF溶液中对大环Schiff碱锌（Ⅱ）配合物的荧光活性进行了初步研究．     

2-氨基吡啶缩水杨醛及稀土金属配合物的合成及表征

制备了2-氨基吡啶缩水杨醛Schiff碱及其稀土金属(La,Ce)配合物,经元素分析、红外光谱、紫外光谱、电导率、热分析和荧光性等表征,确定了配合物的组成分别为[La2(H2O)2L4](NO3)2,[Ce2(H2O)2L4](NO3)2,其中HL=C12H10ON2。配体和配合物都具有一定的荧光性能,其中以配体的荧光性好于配合物的荧光性。     

Synthesis and Characterization of Lanthanide Metal Ion Complexes of New Polydentate Hydrazone Schiff Base Ligand

The new homodinuclear complexes of the general formula [Ln₂L₃(NO₃)₃] (where HL is newly synthesized 2-((2-(benzoxazol-2-yl)-2-methylhydrazono)methyl)phenol and Ln = Sm³⁺ (1), Eu³⁺ (2), Tb³⁺ (3a, 3b), Dy³⁺ (4), Ho³⁺ (5), Er³⁺ (6), Tm³⁺ (7), Yb³⁺ (8)), have been synthesized from the lanthanide(III) nitrates with the polydentate hydrazone Schiff base ligand. The flexibility of this unsymmetrical Schiff base ligand containing N₂O binding moiety, attractive for lanthanide metal ions, allowed for a self-assembly of these complexes. The compounds were characterized by spectroscopic data (ESI-MS, IR, UV/Vis, luminescence) and by the X-ray structure determination of the single crystals, all of which appeared to be different solvents. The analytical data suggested 2:3 metal:ligand stoichiometry in these complexes, and this was further confirmed by the structural results. The metal cations are nine-coordinated, by nitrogen and oxygen donor atoms. The complexes are two-centered, with three oxygen atoms in bridging positions. There are two types of structures, differing by the sources of terminal (non-bridging) coordination centers (group A: two ligands, one nitro anion/one ligand, two nitro anions, group B: three ligands, three anions).     

一个具有铁电性质的手性西佛碱

1,1,1,5,5,5-六氟戊烷-2,4-二酮和(1S,2S)-(--)-1,2-环己二胺反应可得到一个手性西佛碱 (1Z,4Z)-2,4-二（三氟甲基)-5a,6,7,8,9,9a-六氢-3H-benzo[b][1,4]diazepine (1).荧光分析表明当激发光波长为437 nm时,化合物发射波长在488 nm。晶体学分析该化合物属于具有铁电行为的非中心空间群C2,实验得到的铁电电滞回线证实了这个西佛碱具有典型的铁电性,剩余极化强度为0.01 μC/cm2,矫顽场强为0.27 kV/cm。     

西佛碱型大环多胺过渡金属配合物的合成与表征

西佛碱型大环多胺过渡金属配合物的合成与表征