4-酰基-双(1,3-二苯基-5-吡唑啉酮)铽(Ⅲ)配合物的和成及荧光性质

合成了3种4－酰基－双（1，3－二苯基－5－吡唑啉酮），1，5－双（1′，3′－二苯基－5′－吡唑啉酮－4′－基）－1，5－戊二酮；1，6－双（1′，3′－二苯基－5′－吡唑啉酮－4′－基）－1，6－己二酮和1，10－双（1′，3′－二苯基－5′－吡唑啉酮－4′－基）－1，10－癸二酮，通过元素分析，红外光谱和核磁共振氢谱对产物组成进行了表征，合成了它们的Tb(Ⅲ）二元和三元[1,10-二氮杂菲（Phen)或2，2′－联吡啶（Dipy)]配合物，测定了配合物的荧光光谱，对其荧光性质进行了研究，结果表明，配合物发射Tb(Ⅲ）的特征荧光，4－酰基0双（1，3－二苯基－5－吡唑啉酮）配体的三重态能级与Tb(Ⅲ）的最低激发态（5D4）能级匹配较好，配合物荧光强度随4－酰基－双（1，3－二苯基－5－吡唑啉酮）配体2个吡唑环间碳链的增长而减弱，第2配体Phen和Dipy具有荧光增强作用，且前者优于后者。′     

4-(S)-[2-(N-甲基)吗啉基 ]-5-(R )-(l-薄荷烷氧基 )-丁内酯结构分析

N－甲基吗啉对5－（l－薄荷烷氧基）－2（5H）－呋喃酮的光催化不对称共轭加生成了4－（S）－[2－（N－甲基）吗啉基]－5－（R）－(l－薄荷烷氧基）－丁内酯,在四氢呋喃（THF）对比实验、参比物^13CNMR对照及不同溶剂^13CNMR测定的基础上,该新化合物的结构用高分辨率的子核磁共振谱、碳核磁共振谱、质谱、红外光谱及元素分析、旋光度等数据进行了确证。     

氨基硫脲和D-樟脑磺酸钠手性镧系配合物的合成与表征

报道了6种氨基硫脲和D－樟脑磺酸钠与镧系高氯酸盐形成的光学活性配合物，经元素分析确定其组成为C33H51N9O9S6Ln(其中Ln=La,Pr,Nd,Sm,Eu,Gd;Ln:L=1:3），并通过摩尔电导，磁矩，热分析，X射线光电子能谱，红外光谱及紫外－可见光谱等分析测试手段对配合物进行了结构表征和性质研究。配体通过SNO与金属发生配位，Pr^3 和Sm^3 的电子光谱表明存在特征的f-f跃迁，并计算了成键参数（b^1/2)，共价键参数（δ）和电子云重排效应参数（β^-)，这些数据表明4f轨道在配合物形成过程中存在微弱的参与作用。利用圆二色谱对配合物的光学活性进行了研究。配合物绝对构型为（S）型。金属离子的配位数为9，提出了配合物可能的结合方式，为镧系配合物在生化方面的应用提供了依据。     

两个N,N′-亚乙基双(1-苯基-3-亚氨基-1-丁酮)锰(Ⅲ)配合物的合成、表征和晶体结构

合成了两个N,N′－亚乙基双（1－苯基－3－亚氨基－1－丁酮）（简写为H2bzacen)的锰配合物Mn(bzacen).(NO2)EtOH)(1)和Mn(bzacen)(NO2)MeOH)(2)。晶体结构分析表明：配合物1晶体属正交晶系,空间群Pbca,晶胞参数a=2.8173(6)nm,b=2.1946(4)nm,c=0.7683(6)nm,V=4.750(5)nm^3,Z=8, μ=5.71cm^-1,R=0.0540.配合物2晶体属正交晶系,空间君Pbca晶胞参数a=27641(6)nm,b=2,1832(4)jnm,c=0.7705(2)nm,V=4.650(3)nm^3,Z-8, μ=5.81cm^-1,R=0.0564。在这两个配合物中,Mn( Ⅲ）原子均具有畸变的N2O4八面体配位构型,整个晶体通过分子间氢键作用形成一维的无限链, 红外光谱表明,配体在形成配合物后,VC=N和VC＝O和VC－＝C谱带移向低频,NO^-2以一个O原子与Mn（Ⅲ）配位,电子光谱表明存在d-d^*,π－π^*和d－π的跃迁。     

除草剂中间体R-(+)-2-(4-羟基苯氧基)丙酸酯的不对称合成

报道了一种合成苯氧丙酸类除草剂重要中间体R－（＋）－2－（4－羟基苯氧基）丙酸乙酯（即R－（＋）－HPE）的方法，以L－乳酸为起始原料，先经酯化合成L－乳酸乙酯，再与对甲苯磺酰氯反应制备L－对甲苯磺酰乳酸乙酯，再与对苯二酚综合获得R－（＋）－2－HPE，产品的总收率为72.1%。通过元素分析和红外光谱测定，确定了所合成的R－（＋）－HPE的化学结构和纯度；由旋光度的测定，确定了所合成的R－（＋）－HPE的光学纯度为95.7%。     

2-巯基苯并噻唑稀土金属有机配合物的合成及表征

用2－巯基苯并噻唑和三环戊二烯基稀土化合物或三（甲基－环戊二基）稀土化合物反应,合成了未见文献报道的5种稀土金属有机配合物,其结构经元素分析,IR和MS鉴定,推测它们是配体以S,N与Ln(Ln=La,Eu,Tb,Y,Yb)二齿配位的配合物,并且以二倍体形式存在。     

α-[(1H-1,2,4-三唑-1-基)甲基]-β-芳基-β-芳硫基取代苯丙醇的合成及生物活性研究

利用1，3－二芳基－2－[（1H－1，2，4－三唑－1－基）甲基]－2－丙烯－1－酮7与取代硫酚进行1，4－亲核加成，经重排得到化合物4，将化合物4用NaBH4还原，得到目标化合物5，其结构经元素分析、^1H NMR和红外光谱所确证，并测试化合物5对小麦锈病的活性，结果发现大部分化合物的杀菌活性均较低。     

3-芳基-6-(6-/8-取代-4-氯喹啉-3-基)1,2,4-三唑-[3,4-b]-1,3,4-噻二唑类化合物的合成

研究了3－芳基－4－氨基－5－巯基－1，2，4－三唑与6－／8－取代－4－羟基喹啉－3－酸在三氯氧磷催化下的反应，制得16个的3-芳基－6－（6－／8－取代－4－氯喹啉－3－基）1，2－4，－三唑[3,4-b)-1,3,4-噻二唑，新化合物的结构通过元素分析，IR,^1H NMR和MS确定，讨论了其波谱性质。     

2-(1H-唑基)-1-(2,3,4-三甲氧基)苯乙酮衍生物的合成与结构表征

首先以2－溴－1－（2，3，4－三甲氧基）苯乙酮，四丁基铵－1H－1，2，4－三唑或咪唑为原料，分别合成了2－（1H－1，2，4－三唑－1－基）－1－（2，3，4－三甲氧基）苯乙酮（Ia)和2－（1H－咪唑0－1－基）－1－（2，3，4－三甲氧基）苯乙酮（Ib)与盐酸羟胺反应生成2－（1H－1，2，4－三唑－1－基）－1－（2，3，4－三甲氧基）苯乙酮肟和1－（1H－咪唑－1－基）－1－（2，3，4三甲氧基）苯乙酮肟，产率为63％－72％，并经元素分析，IR和1H NMR进行了表征。     

稀土金属有机配合物的红外和拉曼光谱研究

利用新合成的配体N,N,N′,N′－四正丁基己二酰胺Bu2NCO(CH2)4OCNBu2(TBAA)(Bu=正丁基）与一系列稀土金属硝酸盐反应,得到了一系列配合物Ln2(TBAA)3(NO3)6(Ln=La,Nd,Sm,Eu,Gd,Tb,Dy,Tm,Lu)。研究表明,该系列配合物具有相似的红外和拉曼光谱特性,有机配体以羰基中的氧通过双龄和桥连方式与Ln^3 配位,每个Ln^3 的配位数为9。     

反式-5,1O,15-三芳基-5,1O,15-三羟基-1-氢-三苯并[a,f,k]三茚的合成与从头算结构分析

合成了两个具有三个羟基的新型主体分子反式－5,10,15－三芳烃－5,10,15－三羟基－1－氢－三苯并[a,f,k]三茚（芳基分别为苯基和－萘基）,并通过从头算对其及其异构体的结构进行了分析,结果发现当芳基为苯基时,其顺式异构体分子印环中所有原子不完全处于共平面,而其反式异构体和1－萘基的顺反异构体均处于共平面。     

Synthesis and characterization of bis-[1]rotaxanes via salen-bridged bis-pillar[5]arenes

The series of salen-bridged bis-pillar[1]arenes were conveniently prepared by condensation reaction of5,5'-methylenebis(2-hydroxybenzalde hyde)or 5,5'-(propane-2,2-diyl)bis(2-hydroxybenzaldehyde)with mono-amido-functionalized pillar[5]arenes containing different terminal aminoalkyl groups in refluxing ethanol.The^1H NMR and 2D-NOESY spectra indicated that the salen-bridged bis-pillar[5]arenes with longer allcylene linker(n=3,4,6)formed the fascinating bis-[1]rotaxanes,while the salenbridged bis-pillar[5]arenes with short hydrazine and ethylenediamino linker(n=0,2)predominately existed in free form.The single crystal structure of the bis-pillar[5]are ne ambiguously indicated that two propylenediamino linker inserted in to two cavities of pillar[5]arene to form a novel bis-[1]rotaxanes.     

Synthesis and Crystal Structure of 1-（4-Fluorophenyl）-2-hexylthiobenzo[4,5]-furo[3,2-d]-1,2,4-triazolo[1,5-a]pyrimidin-5（1H）-one

The crystal structure of the title compound 1-(4-fluorophenyl) -2-hexylthio-benzo [4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a]pyrimidin-5(1H) -one(C23H21FN4O2S,Mr = 436.5) has been prepared and determined by single-crystal X-ray diffraction. The crystal is of monoclinic,space group P21/n with a = 13.9854(3) ,b = 17.2678(4) ,c = 18.1828(5) ,β = 99.364(2) °,V = 4332.58(18) 3,Z = 4,Dc = 1.338,F(000) =1824,μ = 0.185 mm-1,MoKa radiation(λ = 0.71073) ,R = 0.0538 and wR = 0.1162 for 4728 observed reflections with I > 2σ(I) . X-ray diffraction analysis reveals the fused rings of benzo[4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a] pyrimidin-5(1H) -one system are nearly coplanar. The crystal packing is mainly stabilized by weak intermolecular C-H···O hydrogen bond and π-π interactions.     

BENZOQUINOLINES II. SYNTHESIS OF SOME NEW BENZO[h] PYRIMIDO [4′,5′:4,5]THIENO[2,3-b]QUINOLINE DERIVATIVES AND RELATED FUSED HEXACYCLIC SYSTEMS

Abstract

Reaction of 8-amino-7-(2 furyl)-5,6-dihydrobenzo[h]thieno[2,3-b]quinoline-9-carbonitrile (3a) with phenyl isothiocyanate, triethyl orthoformate, ethylenediamine and/or sodium azide afforded benzo[h]thieno[2,3-b]quinolines 4,7,20 and 25 respectively. Cyclization of thiourea derivative 4 furnished thioxopyrimidine derivative 5. The dithioxopyrimidine 6 was prepared by reaction of 3a with carbon disulfide. On treatment of 7 with hydrazine hydrate, 10-amino-7-(2-furyl)-11-imino-5,6,10,11-tetrahydrobenzo[h]pyrimido[4′,5′:4,5]thieno [2,3-b]quinoline (8) was obtained. Compounds 8,20 and 25 were used as key intermediates in the synthesis of the fused hexacyclic compounds 9–19, 21–24 and 26–28 respectively. 8-Amino-7-(2-furyl)-5,6-dihydrobenzo[h]thieno[2,3-b]quinoline-9-carboxamide (3b) was reacted with some reagents, namely triethyl orthoformate, benzaldehyde, carbon disulfide, phenyl isothiocyanate, and/or acetic anhydride to give the corresponding benzo[h]pyrimido [4′,5′: 4,5]thieno[2,3-b]quinolines 29, 30, 31, 32 and 34. Compound 29 underwent some sequence reactions to give 37–42. Some of the prepared compounds were tested in vitro for their antibacterial and antifungal activities.     

Axle length- and solvent-controlled construction of (pseudo)[1]rotaxanes from mono-thiourea-functionalised pillar[5]arene derivatives

A series of thiourea-functionalised pillar[5]arene derivatives 3ⁿm were constructed from a series of mono-amide-functionalised pillar[5]arenes 2ⁿ. The formation of their free forms or (pseudo)[1]rotaxane structures were controlled by their axle lengths or solvents, which were investigated by ¹H NMR spectroscopy. Some of (pseudo)[1]rotaxane structures were also supported by their single-crystal structures.     

1,5-双(1'-苯基-3'-甲基-5'-吡唑啉酮-4')-戊二酮-[1,5]和十六烷基吡啶盐的稀土配合物的合成及表征

合成了13种1,5-双(1′-苯基-3′-甲基-5′-吡唑啉酮-4′)-戊二酮-[1,5](BPMPPD)和溴化十六烷基吡啶盐(CPB)的稀土配合物.研究了配合物的红外光谱、紫外可见光谱、差热-热重谱、荧光光谱、核磁共振谱及摩尔电导等性质,发现配合物属离子型缔合物CP⁺[Ln(BPMPPD)₂]^-.Pr、Nd、Ho、Er、Tm配合物发生超灵敏跃迁.配合物的热分解温度具有"四分组"效应,Sm、Eu、Tb、Oy为线性荧光。     

Synthesis and characterization of a new pillar[5]arene-based [1]rotaxane

In this study, we reported the synthesis of three kinds of mono-functional pillar[5]arene derivatives PRI, PRII and R and their structures were studied by 1D and 2D NMR spectra and mass spectra. The 2D NMR spectra including ¹H-¹³C HSQC, ¹H-¹H COSY and NOESY spectra indicated that PRI and PRII are both stable self-included pseudo[1]rotaxanes in CDCl₃. These original structures are promising compounds for the design of pillar[5]-based [1]rotaxane. And the results showed that R could exist stable in CDCl₃ and DMSO because of the coordination of N-H?O hydrogen bonding interaction and C-H?π interaction.     

The photochemical synthesis of 6-acyl-5H-benzo[a]phenoxazin-5-ones

6-Acyl-5H-benzo[a]phenoxazin-5-ones were prepared by the photochemical reaction of 5H-benzo[a]phenoxazin-5-one with aldehydes.

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Die photochemische Synthese von 6-Acyl-5H-benzo[a]phenoxazin-5-one (Kurze Mitteilung)

Zusammenfassung Die Titelverbindungen wurden mittels photochemischer Reaktion von 5H-Benzo[a]phenoxazin-5-onen mit Aldehyden hergestellt.

     

Use of the macrocyclic ligand cucurbit[6]uril for isolation of tetranuclear lanthanide aquahydroxo-carboxylate complexes from aqueous solutions

The tetranuclear lanthanide complexes {[Ln₄(μ₃-OH)₄(μ₂-OH)₂(C₅NH₄COO)₂ (H₂O)₄-(C₃₆H₃₆N₂₄O₁₂)₂][Ln(H₂O)₈]_1.5[Ln(H₂O)₆(NO₃)₂]_0.5} (NO₃)₉·nH₂O (Ln = Ho, Gd, or Er) were prepared by heating (130 °C) aqueous solutions of lanthanide nitrates, cucurbit[6]uril (C₃₆H₃₆N₂₄O₁₂), and 4-cyanopyridine. The tetradentate coordination of the macrocyclic cucurbit[6]uril ligands through the portals leads to the formation of sandwich compounds, in which the tetranuclear hydroxo complex is located between two macrocyclic molecules. The polynuclear complexes are additionally stabilized by the chelating effect of the isonicotinate ligands generated by hydrolysis of 4-cyanopyridine. In the complexes, the aromatic moiety of the isonicotinate ion is encapsulated into the hydrophobic inner cavity of cucurbit[6]uril. In the absence of cucurbit[6]uril, the reaction with 4-cyanopyridine produces only the polymeric complexes [Nd(C₅NH₄COO)₃(H₂O)₂] and [Ln(C₅NH₄COO)₂(H₂O)₄]NO₃ (Ln = Pr, Sm, or Gd), whose structures were established by X-ray diffraction. In water and aqueous solutions of nonionic and cationic surfactants, irreversible changes of the tetranuclear fragment of the complex (Ln = Gd) were observed after storage for two days, whereas the anionic surfactant stabilizes the complexes. Dedicated to Academician O. M. Nefedov on the occasion of his 75th birthday. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1885–1894, November, 2006.     

Synthesis of Several 2-Azafluorenones and 5H[1]Benzopyrano[3,4-c]Py Riding-Ones

Convenient syntheses of 2-azafluorenones 5a-f and 5H[1]benzopyrano[3,4-c]pyridin-5-ones 6a-b were performed by using intramolecular cyclization of 4-arylnicotinic acids 4a-F. 4a-f were obtained via permanganate oxidation from the corresponding of 4-arylpyridines 3a-f in good yields.