[Cu（Dfo）3]2+修饰的Keggin型超分子化合物的合成与晶体结构

利用水热合成方法合成了1个新的Keggin基有机-无机杂化化合物[Cu2(Dfo)6(SiMo12O40)],并通过元素分析、红外光谱和X射线单晶衍射方法确定了该化合物的晶体结构.结构分析表明该化合物属于立方晶系,Pa-3空间群,晶胞参数a=b=c=2.081 82(3)nm,α=β=γ=90°,V=9.022 6(4)nm3,Z=4,R1=0.064 9,ωR2=0.156 1.将目标化合物制成碳糊电极,利用循环伏安法研究了其电化学行为及其对NO2-还原的电催化性能.     

水杨醛缩1-氨基乙内酰脲的晶体结构及其金属配合物的合成与表征

在甲醇与冰醋酸的混合溶剂中通过溶剂蒸发法得到了水杨醛缩1-氨基乙内酰脲的单晶,通过X射线单晶衍射法测定了单晶结构。标题化合物(C48H48N12O20),晶胞参数:a=14.247(12)A,b=7.092(6)A,c=13.302(11)A,α=90.0°,β=108.361(11)°,γ=90.0°,V=1275.6(19)A3,Z=1,R=0.0602,wR=0.1667。该化合物是一种靠分子间氢键形成的立体层状结构的超分子化合物。水杨醛缩1-氨基乙内酰脲中的氧原子及氮原子都具有孤对电子,因而具有与金属离子配位的可能。合成出了4种水杨醛缩1-氨基乙内酰脲的过渡金属配合物,通过元素分析、IR及UV表征了配合物的结构。     

新型苦参碱衍生物的水相合成及其晶体结构（英文）

在水相中,以高收率一步合成了13种苦参碱类似物,并借助~1H NMR、~(13)C NMR和HRMS对化合物进行了结构表征.通过X射线单晶衍射分析得到化合物13-(哌啶-1-基)苦参碱(a)、13-(哌啶-1-基)二硫代甲酸苦参碱酯(k)和13-(吗啉-4-基)二硫代甲酸苦参碱酯(m)的精确结构,单晶衍射分析数据显示,三种化合物的结构中都包含5个手性碳原子,其绝对构型分别为5(S),6(S),7(R),11(R),13(S).化合物a单晶结构中含有三个氢键O(2)—H(21B)…N(2),O(2)—H(21A)…O(1)和C(9)—H(9A)…O(1),这些氢键在单晶的形成过程中起着重要的作用.生物活性测试实验显示,所合成的化合物对抑制人结直肠癌细胞SW480、人非小细胞肺癌细胞A549和人表皮鳞癌细胞A431的增殖有一定作用.在苦参碱13位碳上引入氮或硫原子可以提高化合物的抗肿瘤活性.     

N，N’-二羧甲基-2-甲基苯并咪唑内翁盐的合成及晶体结构

以2-甲基苯并咪唑为原料,合成了一个新型的苯并咪唑二羧酸衍生物,基结构通过IR,1HNMR,元素分析和X-射线单晶衍射法确定.X射线衍射单晶结构分析表明,固态时标题化合物通过分子间氢键形成一维无限链状结构,这些一维无限链状结构又通过链与链间的苯并咪唑环的π-π堆积作用形成二维结构.标题化合物的晶体属单斜晶系,P21/c空间群;Mr568.54,a=19.821(3),b=7,.4501(11),c=20.093 (3)A,β=116.479(3)°,v=2655.8(3)A3,z=4,Dc=1.422 mg· m-3,F(000)=1200,最终偏离因子R=0.0675,wR=0.2187.     

三维超分子化合物(H2bimb)2(SiW12O40)的水热合成与晶体结构

利用水热合成方法合成了1个新的Keggin基质的超分子化合物(H2bimb)2(SiW12O40),并通过元素分析、红外光谱、热重分析和X射线单晶衍射方法确定了该化合物的晶体结构.结构分析表明该化合物属于三斜晶系,P-1空间群,晶胞参数a=1.122 6(5)nm,b=1.563 5(5)nm,c=1.892 7(5)...     

二维双层蜂窝状锌配合物的合成、晶体结构及性质研究

利用水热反应合成了一种新的二维双层蜂窝状锌配合物{[Zn2(atz)3(N3)].H2O}n(1)(atz=5-氨基四氮唑),并用元素分析,红外光谱和X-射线单晶衍射对其结构进行了表征,该配合物属单斜晶系,C2/m空间群,晶胞参数为:a=1.0397(2)nm,b=1.7927(4)nm,c=1.109 2(2)nm,V=1.887 0(7)nm3,Z=4。该锌配合物是由N3-和原位合成的5-氨基四氮唑阴离子构成,拓扑分析表明该化合物显示出独特的4-连接六边形的蜂窝双层结构。同时还测定了该化合物的热稳定性及荧光性质。     

三维超分子Ni(Ⅱ)Schiff碱配合物的合成与晶体结构

合成了新的三维超分子化合物[NiL2]·H2O(HL为3-醛基水杨酸单缩乙二胺),并借助红外光谱、元素分析、热重分析和X射线单晶衍射等测试手段对其结构进行了表征.单晶结构解析结果表明,标题化合物属于单斜晶系,C2/c空间群,晶胞参数为:a=1.144 5(11)nm,b=1.914 4(19)nm,c=0.978 3(...     

类杯[6]芳烃修饰的多酸基超分子化合物的合成与晶体结构

利用水热合成方法合成了1个新型类杯芳烃修饰的Keggin型超分子化合物Ag6L6(PMo12O40)2(1)(L=5-甲基四氮唑),其中6个5-甲基四氮唑配体和6个银配位形成了类杯[6]芳烃的多核银配合物.通过红外光谱、元素分析和X射线单晶衍射方法确定了该化合物的晶体结构.单晶结构分析表明化合物1属于六方晶系,R-3空间群,晶胞参数a=1.779 0 8(8)nm,b=1.779 0 8(8)nm,c=2.408 8 5(19)nm,α=90°,β=90°,γ=120°,V=6.602 8(7)nm3,Z=3.     

一种新型高氮含能化合物5-((5-硝基-2H-四唑-2-基)甲基)-1H-四唑-1-醇的合成与表征

以5-氨基四唑为起始原料,经重氮化-硝化、烷基化、肟化、重氮化-氯化、叠氮化和环合等单元反应以19%的总产率合成了一种新型含能化合物5-[(5-硝基-2H-四唑-2-基)甲基]-1H-四唑-1-醇.利用NMR,IR,MS及元素分析等进行了结构表征;利用X射线单晶衍射法测试了该化合物的晶型结构,该化合物属于单斜晶系,空间群P2(1)/c,晶胞参数:a=3.3619(11),b=9.3910(19),c=8.2060(16),β=101.44(3)°,Z=2,Dc=1.748 g·cm-3,μ=0.153 mm-1,F(000)=216;利用差示扫描量热法(DSC)和热重(TG)分析研究了该化合物的热性能,分解温度为202.25℃,热重变化范围130~320℃,总失重78.6%;利用Kamlet-Jacobs公式估算了该化合物的爆轰性能,理论爆速和爆压分别为8500 m·s-1和31.53 GPa.     

一维链状超分子化合物[Cu(dafo)_2(H_2O)_2](OPA)_2的合成和晶体结构

用4,5-二氮芴-9-酮(dafo)、邻苯二甲酸和硝酸铜合成了二价铜的一维链状超 分子化合物[Cu(dafo)_2(H_2O)_2]-(OPA)_2(OPA=邻苯二甲酸一价阴离子),其结构 通过单晶X射线衍射法确定。该化合物是单斜晶系,空间群为P2(1)/c。晶胞参数： a = 0.71093(16)nm, b = 1.5724(4)nm, c = 1.5357(3)nm, α=90.000(5) °, β =102.220(4) °,γ=90.000(5) °, V = 1.6778(6)nm~3, Z = 2, F(000) = 814, M_r = 794.17, D_c = 1.527 g/cm~3, μ = 0.727 mm~(-1), R_1 = 0.0406, wR_2 = 0.0930.单晶结构分析表明该化合物具有一维链状结构,该结构是通过氢 键这种弱相互作用形成的。     

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.