基于两个取代四甲基环戊二烯基配体的金属羰基化合物的合成及晶体结构

配体[C₅Me₄HR][R=4-BrPh(1),(MeC₅H₃N)CH₂(2)]分别与Mo(CO)₆,Ru₃(CO)₁₂和Fe(CO)₅在二甲苯中加热回流,得到了6个双核配合物trans-[η⁵-C₅Me₄R]₂Mo₂(CO)₆(3,4),trans-[(η⁵-C₅Me₄R)Ru(CO)(μ-CO)]₂(5,6)和trans-[η⁵-(C₅Me₄R)Fe(CO)(μ-CO)]₂(7,8,).通过元素分析、红外光谱、核磁共振氢谱对配合物的结构进行了表征,并用X-射线单晶衍射法测定了配合物3,5,6和8的结构.     

芳基取代茚基钌羰基化合物的合成及晶体结构

配体C₉H₇R(R=Ph (1),4-tolyl (2),4-chlorophenyl (3),4-methoxyphenyl (4),2-thienyl (5))分别与Ru₃(CO)₁₂在甲苯或二甲苯中加热回流,得到了5个双核配合物[(η⁵-C₉H₆R)Ru(CO)]₂(μ-CO)₂(R=Ph (6),4-tolyl (7),4-chlorophenyl (8),4-methoxyphenyl (9),2-thienyl (10))。通过元素分析、红外光谱、核磁共振氢谱对配合物的结构进行了表征,并用X-射线单晶衍射法测定了配合物6,7和10的结构。     

芳基取代茚基钌羰基化合物的合成及晶体结构

配体C₉H₇R(R=Ph(1),4-tolyl(2),4-chlorophenyl(3),4-methoxyphenyl(1),2-thienyl(5))分别与Ru₃(CO)₁₂在甲苯或二甲苯中加热回流,得到了5个双核配合物[(η⁵-C₉H₆R)Ru(CO)]₂(μ-CO)₂(R=Ph(6),4-tolyl(7),4-chlorophenyl(8),4-methoxyphenyl(9),2-thienyl(10))。通过元素分析、红外光谱、核磁共振氢谱对配合物的结构进行了表征,并用X-射线单晶衍射法测定了配合物6,7和10的结构。     

基于二茂铁羧酸配体的镉配合物的合成及结构研究

以二茂铁甲酸根FcCOO^-(Fc=(η⁵-C₅H₅)Fe(η⁵-C₅H₄))为主要配体，合成了3个新的配合物[Na₂Cd( μ₃-η²-FcCOO^-)₂(μ₂-η²-FcCOO^-)₂(CH₃OH)₂]_n (1)、[Cd(phen)(FcCOO^-)(η²-FcCOO)(H₂O)](phen=邻菲咯啉) (2)、[Cd(Det)(η²-FcCOO^-)(FcCOO^-)](H₂O)₂(Det=二乙撑三胺) (3)。测定了配合物的晶体结构。配合物1为单斜晶系，C2/c空间群，二茂铁甲酸根采用μ₃-η²-FcCOO^-和μ₂-η²-FcCOO^-的配位方式将Cd²⁺和Na⁺连接成一维无限链状结构。配合物2和3均为单核结构，单斜晶系，P2₁/c空间群，二茂铁甲酸根都采用 FcCOO^-和η²-FcCOO^-的方式配位。2中phen以双齿螯合形式配位，水分子参与配位，中心镉离子配位数为6。3中Det以三齿螯合形式配位，中心镉离子配位数也为6，但水分子未参与配位。     

含硅铁键环状化合物[Me2Si-η5-C5H4Fe(CO)(PPh3)][Me2Si-η5-C5H4Fe- (CO)2－n(PPh3)n] (n＝0或1)的合成与结构

鉴于含硅-过渡金属键化合物作为催化剂具有重要的应用价值, 在我们最近发现的化合物(η⁵,η⁵-C₅H₄Me₂SiSi-Me₂C₅H₄)Fe₂(CO)₄ (1)的硅硅键和铁铁键复分解重排反应可以有效地合成含有两个硅铁键的环状化合物[Me₂Si-η⁵-C₅H₄- Fe(CO)₂]₂ (2)的基础上, 对该硅铁键环状化合物的三苯基膦取代衍生物[Me₂Si-η⁵-C₅H₄-Fe(CO)(PPh₃)][Me₂Si-η⁵-C₅H₄Fe(CO)_2－n(PPh₃)_n] (3: n＝0, 5: n＝1)的合成方法进行了研究. 发现化合物1在三苯基膦存在下的复分解重排反应是合成单三苯基膦取代产物3的最好方法; 而双三苯基膦取代化合物5则可通过光照条件下2与三苯基膦发生羰基取代反应而得到, 产物中含有的顺反异构体可利用制备薄层色谱法分离. 利用X射线衍射法测定了化合物3的分子结构, 考察了三苯基膦配体的存在对分子结构的影响以及三苯基膦与铁形成的配位键的稳定性.     

三核钌簇合物[PyCH=C(Ph)O]2Ru3(CO)8的合成、结构及反应性

配体PyCH₂COPh与Ru₃（CO）₁₂在甲苯中加热回流,得到了标题簇合物[PyCH=C（Ph）O]₂Ru₃（CO）₈（1）。通过红外光谱、核磁共振氢谱和碳谱对1的结构进行了表征,用X射线单晶衍射法测定了1的结构。结果表明：3个钌原子呈等腰三角形分布,其中Ru（2）-Ru（1）和Ru（2）-Ru（1）ⁱ的键长均为0.280 nm,Ru（1）-Ru（1）ⁱ的键长为0.307 nm。同时研究了簇合物1与环戊二烯及茚的反应,分别得到双核钌羰基配合物[（η⁵-C₅H₅）Ru（CO）]₂（μ-CO）₂（2）和[（η⁵-C₉H₇）Ru（CO）]₂（μ-CO）₂（3）。     

镍螺旋化合物及其杂银配位聚合物的设计合成与结构

采用两个易扭转异构的双三齿有机配体，双吡啶二甲基-6,6′-二酰肼-2,2′-连吡啶(H₂L¹)和双吡啶二乙基-6,6′-二酰肼-2,2′-连吡啶(H₂L²)，和金属镍离子组装得到2个金属螺旋体(helicate)，Ni₂(HL¹)₂(PF₆)(BF₄)(CH₃OH)(H₂O)₂ (1)和Ni₂(HL²)(H₂L²)(ClO₄)₃(C₂H₅OH)(CH₃OH)H₂O)₃ (2),并测定了它们的晶体结构。同时由配体H₂L³出发,通过逐级组装的方法,得到一个镍-银杂金属的配位聚合物Ni₂Ag₂(HL³)₂(ClO₄)₂(CH₃CN)₃ (3)。单晶结构表明，配位聚合物3中配体H₂L³首先与镍离子组装成分子盒化合物(molecular box)，该结构单元进一步通过Ag离子与分子盒外围N原子配位，使分子盒互相串连成一维配位聚合物3，分子盒聚集体沿c方向伸展成一维链结构，链与链之间相互平行，进一步堆积成二维孔道结构。     

膦配体取代的乙基乙撑双铁配合物的合成、晶体结构及电化学催化性能

以母体配合物[Fe₂(CO)₆(μ-SCH₂CH(CH₂CH₃)S)](1)分别与三(2-呋喃基)膦、二苯基丙基膦、双(二苯基膦)乙炔、1,2-双(二苯基膦基)苯和脱羰试剂Me₃NO·2H₂O反应,制备了单取代配合物[Fe₂(CO)₅(L)(μ-SCH₂CH(CH₂CH₃)S)](L=P(2-C₄H₃O)₃,2;Ph₂PCH₂CH₂CH₃,3)、桥联配合物{[Fe₂(CO)₅(μ-SCH₂CH(CH₂CH₃)S)]2(Ph₂PC≡CPPh₂)}(4)和螯合配合物[Fe₂(CO)₄(κ²-(Ph₂P)₂(1,2-C₆H₄))(μ-SCH₂CH(CH₂CH₃)S)](5)。配合物2~5经元素分析、红外光谱、核磁共振氢谱和磷谱表征,并进一步得到单晶X射线衍射的确证。电化学研究表明,在弱酸HOAc作为质子源存在的情况下,这些配合物可以实现催化质子还原产生氢气的功能。     

有机锡联苯乙酸酯的合成、结构表征和体外抗癌活性

合成了4个新的有机锡联苯乙酸酯{[(n-C₄H₉)₄Sn(O₂CCH₂C₆H₄C₆H₅-4)]₂O}₂ (1)和R₃SnO₂CCH₂C₆H₄C₆H₅-4(R=C₄H₅，2；c-C₆H₁₁，3；C₆H₅C(CH₃)₂CH₂，4)，利用元素分析、IR、 ¹H和 ¹³C NMR表征了其结构。通过X-射线单晶衍射测定了1和4的晶体结构。化合物1和化合物4均属三斜晶系，空间群P1。化合物1为具有Sn₂O₂四元环的中心对称二聚体结构，4为畸变的四面体结构。生物活性测试结果表明，化合物1和4对3种人癌细胞HeLa、CoLo205和MCF-7具有较好的体外抑制活性。     

二烃基锡萘氧乙酸酯的合成、表征和{[(n-C4H9)2Sn(OOCCH2OC10H7)]2O}2的晶体结构

利用二烃基氧化锡和α-萘氧乙酸按1∶1反应，合成了8种新的有机锡化合物,{[(n-C₄H₉)₂Sn(OOCCH₂OC₁₀H₇)]₂O}₂(R= ⁿBu 1，2-ClC₆H₄CH₂ 2，3-ClC₆H₄CH₂ 3，4-ClC₆H₄CH₂ 4，2-FC₆H₄CH₂ 5，3-FC₆H₄CH₂ 6, 4-FC₆H₄CH₂ 7, 4-NCC₆H₄CH₂ 8)。用元素分析、IR、 ¹H NMR对其结构进行了表征,并测定了化合物{[(n-C₄H₉)₂Sn(OOCCH₂OC₁₀H₇)]₂O}₂ (1)的晶体结构。该化合物晶体属三斜晶系,空间群P1,a=11.974(7) nm，b=1.360 5(9) nm，c=1.386 5(9) nm，α=103.940(9)°，β=104.876(8)°，γ=99.807(9)°，Z=1，V=2.053(2) nm³，D_c=1.431 Mg·m^-3，μ=1.261 mm^-1，F(000)=900，S=1.004，R₁=0.061 0，wR₂=0.151 9。结果表明，化合物1是以Sn₂O₂为中心的中心对称二聚体结构，内环锡和外环锡原子均为五配位的畸变三角双锥构型。     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Cu0-catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N-cyclic azomethine imines to ynones

A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu⁰ as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than Cu^I in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT).     

Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates

(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C₆₀, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine.